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## #1 2010-01-11 20:04:14

GURL
Member
From: Grenoble
Registered: 2005-12-06
Posts: 3501

### PapySpheric: a Python program to build templates for panospheres

#### Code:

# Version 0.0.1 - mercredi 13 janvier 2010
##########----------##########----------##########----------##########----------
# my camera: 23 x 15.5 mm
# Olypus: 13 x 17.3 mm
# Nikon APS-C: 23.6 x 15.8 mm
# Pentax K20D 23.4 x 15.6 mm

#####################  THE  9  PARAMETERS  YOU  MUST  SET  ARE  THERE
#  ##################################################
f= 18               # mm, for example 50 mm
Vside= 23.4         # mm, for example 36 mm  \  portrait / landscape
Hside= 15.6         # mm, for example 24 mm  /  orientation found there
phiMin= -90         # degrees, from -90 (nadir) toward 90
phiMax= 90          # degrees, up to 90 (zenith) toward -90
Hoverlap= 0.2       # horizontal overlap, coef from 0 to 0.5 (0% to 50 %)
Voverlap= 0.2       # vertical overlap, coef from 0 up to more than 0.5
#
panoheadPhiMin= -90 # degrees, from -90 (nadir)  \ avoids the camera or lens
panoheadPhiMax= 90  # degrees, up to 90 (zenith) / hitting the pano head !
#
#####################

from math import *

assert f > 1 and f < 1001, "f: improper focal length"
assert Vside > 1 and Vside < 100, "Vside: improper size"
assert Hside > 1 and Hside < 100, "Vside: improper size"
assert phiMin >= -90 and phiMin < 85, "phiMin not between -90 and +85"
assert phiMax <= 90 and phiMax > -85, "phiMax not between -85 and +90"
assert phiMin != phiMax, "phiMin, phiMax: min and max are equal"
assert phiMin < phiMax, "phiMin, phiMax: min and max are inverted"
assert Hoverlap >= 0, "Hoverlap: minimum possible value is 0"
assert Hoverlap < 0.96, "Hoverlap: maximum possible value is 0.95"
assert Voverlap >= 0, "Voverlap: minimum value is 0"
assert Voverlap < 0.96, "Voverlap: maximum value is 0.95"
assert panoheadPhiMin >= -90, "panoheadPhiMin: extreme value is -90"
assert panoheadPhiMax <= 90, "panoheadPhiMax: maximum value is 90"
+ "Pano-head extreme top & bottom positions are stupid!"

trueVside=  Vside
trueHside=  Hside
trueVfov=   degrees(2 * atan (trueVside / 2 / f))
trueHfov=   degrees(2 * atan (trueHside / 2 / f))

if phiMax - trueVfov / 2 > panoheadPhiMax :
print("\nCAUTION! ...panorama phiMax incompatible",
"with pano-head phiMax has been reduced!\n")
phiMax= panoheadPhiMax - trueVfov / 2

if phiMin + trueVfov / 2 < panoheadPhiMin :
phiMin= panoheadPhiMin + trueVfov / 2
print("\nCAUTION! ...panorama phiMin incompatible",

truePhiMin= phiMin
truePhiMax= phiMax

##########----------##########----------##########----------##########----------

print("Camera:")
print("    Sensor size         ", repr(trueHside)[0:4] + " x " + repr(trueVside),"mm")
print("    Focal length        ", repr(f)[0:5], "mm")
print("    Lens vertical FOV   ", round(degrees(2 * atan (trueVside / 2 / f))), "deg")
print("    Lens horizontal FOV ", round(degrees(2 * atan (trueHside / 2 / f))), "deg")

print("\nPanorama:")
print("    Top at              ", repr(phiMax)[0:5], "deg")
print("    Bottom at           ", repr(phiMin)[0:5], "deg")
print("    vertical FOV        ", repr(phiMax - phiMin)[0:5], "deg")
print("    Vertical overlap    ", repr(int(100 * Voverlap))+" %")
print("    Horizontal overlap  ", repr(int(100 * Hoverlap))+" %")

if panoheadPhiMin != -90 or panoheadPhiMax != 90 :
if panoheadPhiMin != -90  :
print("    downward limit", int(panoheadPhiMin), " deg")
if panoheadPhiMax != 90 :
print("    upward limit", int(panoheadPhiMax), " deg")

print(" ")

##########----------##########----------##########----------##########----------

totalImgNb= int(0)

if trueVfov > trueHfov :
optimalZenith= 90 - ((trueVfov - trueHfov) / 2)
optimalNadir= -90 + ((trueVfov - trueHfov) / 2)
else :
optimalZenith = 90
optimalNadir = -90               # overlap between zenith disc and top row
#########################################
if panoheadPhiMax >= optimalZenith \
and truePhiMax > 90 - (trueHfov / 2 * (1 - max(Voverlap, Hoverlap))) :
zenith= "yes"
phiMax= phiMax - (min(trueHfov, trueVfov) / 2 * (1 - max(Voverlap, Hoverlap)))
totalImgNb= totalImgNb + 1
else :
zenith= "no"                        # no overlap with zenith hole is wanted
phiMax= phiMax - (trueVfov * Voverlap / 2)
print("# phiMax moved downward by", repr(trueVfov * Voverlap / 2)[0:5],
"deg -----------------------> 0 % overlap with zenith hole")

and abs(truePhiMin) > 90 - (trueVfov / 2 * (1 - max(Voverlap, Hoverlap))) :
phiMin= phiMin + (min(trueHfov, trueVfov) / 2 * (1 - max(Voverlap, Hoverlap)))
totalImgNb= totalImgNb + 1
else :
nadir= "no"                          # no overlap with nadir hole is wanted
phiMin= phiMin + (trueVfov * Voverlap / 2)
print("# phiMin moved upward by", repr(trueVfov * Voverlap / 2)[0:5],
"deg -------------------------> 0 % overlap with nadir hole")

Vfov=   trueVfov  * (1 - Voverlap)
Hfov=   trueHfov  * (1 - Hoverlap)
Vside=  2 * f * tan(radians(Vfov / 2))
Hside=  2 * f * tan(radians(Hfov / 2))

linV=   1 - Vside / trueVside # Out of disc part of zenith and/or nadir
linH=   1 - Hside / trueHside # not taken into account tough it should be!
if int(linV) != int(linH) :
print("# Linear vertical overlap   --> ", repr(100 * (linV))[0:5],
"% of source pixels")
print("# Linear horizontal overlap --> ", repr(100 * (linH))[0:5],
"% of source pixels")
else :
print("# Linear overlap --> ", repr(100 * (linV))[0:5],
"% of source pixels")

anglV=  1 - Vfov / trueVfov # idem about out of disc part of zenith, nadir
anglH=  1 - Hfov / trueHfov
if int(100 * (anglV + anglH)) != int(100 * (linV + linH)) :
if int(anglV) != int(anglH) :
print("# Angular vertical overlap   --> ", repr(100 * anglV)[0:5], "%")
print("# Angular horizontal overlap --> ", repr(100 * anglH)[0:5], "%")
else :
print("# Angular overlap --> ", repr(100 * anglV)[0:5], "%")

rowNb= (phiMax - phiMin) // Vfov
if rowNb * Vfov < phiMax - phiMin :
rowNb= rowNb + 1
dPitch= (phiMax - phiMin) / rowNb

sigmaPhi= rowNb * trueVfov
if nadir == "yes" :
sigmaPhi= sigmaPhi + (trueVfov + trueHfov )/ 2 / 2 # sic!
if zenith == "yes" :
sigmaPhi= sigmaPhi +  + (trueVfov + trueHfov )/ 2 / 2  # sic!
VangularExcess= (sigmaPhi - (truePhiMax - truePhiMin)) / sigmaPhi

##########----------##########----------##########----------##########----------

toPrint= "\n" + "Number of rows: " + repr(int(rowNb))
if zenith == "yes" :
toPrint= toPrint + " + zenith"
if nadir == "yes" :
toPrint= toPrint + " + nadir"
print (toPrint + "\n")

print("# Lens vertical angles :    ",
repr(trueVfov * Voverlap / 2)[0:4], "+", repr(Vfov)[0:4], "+",
repr(trueVfov * Voverlap / 2)[0:4], "=",repr(trueVfov)[0:4] + " deg")
print("# Lens horizontal angles :  ",
repr(trueHfov * Hoverlap / 2)[0:4], "+", repr(Hfov)[0:4], "+",
repr(trueHfov * Hoverlap / 2)[0:4], "=", repr(trueHfov)[0:4] + " deg")
if zenith == "yes" or nadir == "yes" :
if Hfov < Vfov :
print("# Zenith and Nadir angles:  ", repr(Hfov / 2)[0:4], "+",
repr(trueHfov * Hoverlap / 2)[0:4], "=",
repr(trueHfov / 2)[0:4] + "deg")
else :
print("# Zenith and Nadir angles:  ", repr(Vfov / 2)[0:4], "+",
repr(trueVfov * Voverlap / 2)[0:4], "=",
repr(trueVfov / 2)[0:4] + " deg")

print("# Modified phiMax = " + repr(phiMax)[0:4] + " deg")
print("# Modified phiMin = " + repr(phiMin)[0:5] + " deg")
print("# Row to row delta Pitch = " +
repr(dPitch)[0:4] + " deg -----------------------> " +
repr(int(100 * VangularExcess)) +
" % vertical angular excess (total angle: " +
repr(int(sigmaPhi)) + " deg)")
print("#############################")

##########----------##########----------##########----------##########----------

if nadir== "yes" :
if trueVfov > trueHfov :
print("\nNadir shoot at " + repr(optimalNadir)[0:5] + " deg\n")
else :
print("\nNadir shoot at -90 deg\n")
pitchList=  [repr(optimalNadir)[0:5]]           ## 1 ##
imgNbList=  [int(1)]                            ## 2 ##
imgYawList= ["0.0"]                             ## 3 ##
else :
pitchList=  []                                  ## 1 ##
imgNbList=  []                                  ## 2 ##
imgYawList= []                                  ## 3 ##

if rowNb != 1 :
prevTop= phiMin
else :
prevTop= (phiMin + phiMax) / 2 - Vfov / 2
i= 0

while i < rowNb :                              # begin rows loop <-----------------------------
bottom= prevTop
top= prevTop + dPitch
pitch= (bottom + top) / 2

if pitch < 0 :
pitchList= pitchList + [repr(pitch)[0:5]]    ## 1 ##
else :
pitchList= pitchList + [repr(pitch)[0:4]]    ## 1 ##

if abs(bottom) < abs(top) :        # the smaller the distance
largeCirclePitch= abs(bottom)  # between a circle and the equator
smallCirclePitch= abs(top)     # ... the larger this circle is
else:
largeCirclePitch= abs(top)
smallCirclePitch= abs(bottom)

largePitch=  largeCirclePitch
midlePitch=  (largeCirclePitch + smallCirclePitch) / 2
smallPitch=  smallCirclePitch

# midlePitch (degrees, unsigned) points to the circle where images
# sides must be adjacent

MoHSD= f / cos(radians(dPitch / 2)) # MoHSD: Middle of Horizontal Sides
# Distance from sphere center

# angle under which is seen an image (decreased for overlap) in the:
unadjdYaw= degrees(2 * (atan(Hside / 2 / circleRadius)))   # middle circle horizontal plane
largedYaw= degrees(2 * (atan(trueHside / 2 / largeRadius)))# largest circle horizontal plane
smalldYaw= degrees(2 * (atan(trueHside / 2 / smallRadius)))# smallest circle horizontal plane

imgNb= 360 // unadjdYaw
if imgNb * unadjdYaw < 360 :
imgNb = imgNb + 1
dYaw = 360 / imgNb
if largedYaw < dYaw :
imgNb= 360 // largedYaw
if imgNb * largedYaw < 360 :
imgNb = imgNb + 1
dYaw = 360 / imgNb
selected= "# based on LARGE circle, dYaw: " + repr(dYaw)[0:5] + " deg"
else :
selected= "# based on MIDLE circle, dYaw: " + repr(dYaw)[0:5] + " deg"

imgNbList= imgNbList + [int(imgNb)]                ## 2 ##
HexcessContiguous= (imgNb * unadjdYaw - 360) / 360

toPrint = "\nrow " + repr(i + 1).ljust(2) + " of " + repr(int(rowNb)) \
+ ", pitch: " + repr(int(pitch)) \
+ " deg      # top overlap at " + repr(int(round(top))) \
+ " deg, bottom overlap at " + repr(int(round(bottom))) + " deg"
print (toPrint)
print("                                " + selected)

if abs(round(top)) == abs(round(bottom)) :
toPrint= "                                # large circle is any -----> "
elif largeCirclePitch == abs(bottom) :
toPrint= "                                # large circle at bottom --> "
else:
toPrint= "                                # large circle at top -----> "

HexcessLarge= (largedYaw - dYaw) / largedYaw
toPrint= toPrint + repr(int(100 * HexcessLarge)) + " % overlap"
print (toPrint)

toPrint=     "             deg                # small circle ------------> "
HexcessSmall= (smalldYaw - dYaw) / smalldYaw
toPrint= toPrint + repr(int(100 * HexcessSmall)) + " % overlap"
print (toPrint)

dYaw = 360 / imgNb
j= 0                                  # begin images loop <-----------------
while j < imgNb :
imgYawList= imgYawList + [repr(j * dYaw)[0:5]]  ## 3 ##
totalImgNb= totalImgNb + 1

print ("    ", repr(j + 1).ljust(2), "yaw:", int(j * dYaw))

j= j + 1                          # end   images loop <-----------------
i= i + 1
prevTop= top                          # end   rows loop <-------------------

##########----------##########----------##########----------##########----------

if zenith == "yes" :
if trueVfov > trueHfov :
print("\nZenith shoot at " + repr(optimalZenith)[0:4] + " deg")
else :
print("\nZenith shoot at 90 deg")
pitchList= pitchList +  [repr(optimalZenith)[0:4]]   ## 1 ##
imgNbList= imgNbList + [int(1)]                      ## 2 ##
imgYawList= imgYawList + ["0.0"]                     ## 3 ##

print("\nTotal number of images: " + repr(totalImgNb) + "\n")

##########----------##########----------##########----------##########----------

print("#############################\n")

k= 0
for i in range(len(pitchList)) :
pitchString= 'pitch="' + pitchList[i] + '" yaw="'
if pitchString[7] == '-' and pitchString[9] == '.' :
pitchString= pitchString[0:10]+pitchString[11:]
for j in range(imgNbList[i]) :
yawString= imgYawList[k] + '"'; k= k + 1;
print(pitchString + yawString)
print("")

print("#############################")
#print("the following is buggy...")
#totalArea= totalImgNb * trueVside * trueHside
#imgDiag = sqrt((trueVside)**2 + (trueHside)**2)
#r = sqrt(f**2 + (imgDiag / 2)**2)
#wrapingCylinderHeight = r * (  sin(radians(abs(truePhiMax)))
#wrapingCylinderArea= 2 * pi * r * wrapingCylinderHeight
######################

Last edited by GURL (2010-01-13 16:32:19)

Georges

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## #2 2010-01-11 20:42:21

GURL
Member
From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

The aim of this Python 3.1 program is to compute good pitch and yaw values to be used when shooting spherical 360 degrees panos, so that It will not work for usual "regular", "rectangular", "rows x columns", "non-360" panos...

This is the 0.0.0 pre-release, pre-candidate version.

For this reason, there is no GUI interface or, to be honest, no interface at all: one must modify the parameters values in the source program using a text editor like the Window notepad...

PARAMETERS

f ...................... lens focal lens in millimeters
Vside ................ sensor vertical sides size in millimeters
Hside ................ sensor horizontal sides size in millimeters
phiMin ............... bottom angle of the pano (like in Autopano Editor window, bottom right corner)
phiMax .............. top angle of the pano (like in Autopano Editor window, bottom right corner)
Hoverlap ............ horizontal overlap, between 0 (0 %) and 1 (100%)
Voverlap ............ vertical overlap, between 0 (0 %) and 1 (100%)
panoheadPhiMin  .. maximum angle of the pano head toward nadir
panoheadPhiMax .. maximum angle of the pano head toward zenith

#### Code:

######################### <--  T H E    9    P A R A M E T E R S   Y O U    M U S T   S E T   A R E   T H E R E
#     #################################################################################
f= 9                    #     mm, for example 50 mm
Vside= 17.3             #     mm, for example 36 mm  _  portrait / landscape source images orientation is found there
Hside= 13               #     mm, for example 24 mm  /
phiMin= -70             #     degrees, from -90 (nadir) toward 90
phiMax= 90              #     degrees, up to 90 (zenith) toward -90
Hoverlap= 0.15          #     horizontal overlap, coef from 0 (= none) up to more than 0.5 (= 50 %)
Voverlap= 0.15          #     vertical overlap, coef from 0 up to more than 0.5
#
panoheadPhiMin= -70     #     degrees, from -90 (nadir)  _ that's to avoid the camera codides with the pano head !
panoheadPhiMax= 90      #     degrees, up to 90 (zenith) /
#
#########################

OVERLAP

There is a vertical overlap parameter plus a horizontal overlap parameter because ...why not?
You must be warned that I hope the final overlap will be alway greater than the parameter values, but I'm not sure yet!
On a spherical surface there is no clear and well known definition of overlap: overlap varies from one row to the next and an 'angular overlap' apparently makes more sense than a 'linear overlap' (which, BTW, would be very difficult to compute.)

Georges

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## #3 2010-01-11 20:45:50

GURL
Member
From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

IMPROVEMENTS:

Though my own list includes many possible refinements, I'm completely open to any idea...

Georges

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## #4 2010-01-11 23:48:52

JohnM
Member
Registered: 2006-10-31
Posts: 268

### Re: PapySpheric: a Python program to build templates for panospheres

Thats cool. I dont have a head yet, but this script is a timesaver when shooting sphericals with wide lenses and might be my reason to get a PapyWizard setup for tricky places like under a bridge, on top of masts etc.

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## #5 2010-01-12 18:55:49

GURL
Member
From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

Here is an example for an APS-C camera and a 18 mm 'kit' lens:

#### PapySpheric  wrote:

Camera:
Sensor size          15.6 x 23.4 mm
Focal length         18 mm
Lens vertical FOV    66 deg
Lens horizontal FOV  47 deg

Panorama:
Top at               90 deg
Bottom at           -90 deg
vertical FOV         180 deg
Vertical overlap     20 %
Horizontal overlap   20 %

downward limit -75  deg

Number of rows: 3 + zenith

row 1  of 3, pitch: -57 deg

deg
1  yaw: 0
2  yaw: 45
3  yaw: 90
4  yaw: 135
5  yaw: 180
6  yaw: 225
7  yaw: 270
8  yaw: 315

row 2  of 3, pitch: -6 deg

deg
1  yaw: 0
2  yaw: 36
3  yaw: 72
4  yaw: 108
5  yaw: 144
6  yaw: 180
7  yaw: 216
8  yaw: 252
9  yaw: 288
10 yaw: 324

row 3  of 3, pitch: 45 deg

deg
1  yaw: 0
2  yaw: 45
3  yaw: 90
4  yaw: 135
5  yaw: 180
6  yaw: 225
7  yaw: 270
8  yaw: 315

Zenith shoot at 80.4 deg

Total number of images: 27

Georges

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## #6 2010-01-13 14:05:54

gkaefer
Member
From: Salzburg
Registered: 2009-06-09
Posts: 2674
Website

### Re: PapySpheric: a Python program to build templates for panospheres

I cant start it...

what I did:
installed python 2.6.4 for windows from:
http://www.python.org/ftp/python/2.6.4/python-2.6.4.msi
I saved your sourccode as papysperic.py under C:\Python26 (default phyton dir on win)
I opened phyton gui
opened papyspheric.py
I do a "run module"

"There's an error in your program: unexpedted ident"

it than goes to line 164:
imgNb= 360 // unadjDeltaYaw

sorry... no linux available ;-(

Liebe Gruesse,
Georg

Last edited by gkaefer (2010-01-13 14:06:45)

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## #7 2010-01-13 16:00:29

Paul
Member
From: Bonn, Germany
Registered: 2008-08-30
Posts: 846

### Re: PapySpheric: a Python program to build templates for panospheres

YES you can too ..

I can start it...

what I did:

I deleted the linefeed before the word "cercle" and bingo ...
# angle sous lequel on voit le côté entier dans le plan du plus petit cercle

and I did it with portable python

Paul

close, but no cigar ... ... ...

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## #8 2010-01-13 16:42:14

gkaefer
Member
From: Salzburg
Registered: 2009-06-09
Posts: 2674
Website

### Re: PapySpheric: a Python program to build templates for panospheres

#### Paul wrote:

YES you can too ..

I can start it...

what I did:

I deleted the linefeed before the word "cercle" and bingo ...
# angle sous lequel on voit le côté entier dans le plan du plus petit cercle

and I did it with portable python

;-) ok bingo...

the today updated sourcecode from above works also with my python version now fluently

Liebe Gruesse,
Georg

Online

## #9 2010-01-13 16:54:05

claudevh
Moderator
From: Mont-Saint-André (Belgium)
Registered: 2007-11-25
Posts: 1389
Website

### Re: PapySpheric: a Python program to build templates for panospheres

Hello Gurl,

With the correction of Paul, it work fine !
This "calculator" is only for "Wide Angle" , could we have the same for "Fish eyes" or may be a additional parameter for the choice between the 2 ?

Claude
Merlin + Papywizard on Windows 7 & Nokia 770 § N810 & Acer (Netbook) + PanoramaApp Androïd + Deltawave PapyMerlin BT + Autopano
Spherical Pano (180 x 360) with Canon 40D + Canon EF-S 10-22mm f/3.5-4.5 Zoom & Pôle Pano with Canon 5D MK2 and shaved Tokina 10-17 3.5-4.5 AF DX Fisheye
Gigapixel photography with Nikon D200 + Sigma 70-200 F 2.8 EX DG APO HSM

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## #10 2010-01-13 16:57:51

GURL
Member
From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

I replaced the previous 0.0.0 by the 0.0.1 version in the above post

- Bug: the lines are shorter, so that no more folded line errors should occur.
- Bugs: many were removed but probably some were added...
- Added: pitch="pp.p" yaw="yy.y" for each images in the results.
- Added: input parameters are now verified.
- Improved: vertical overlap computations.

The most difficult part is to compute the actual overlap. I'm not satisfied with the present approximations but the truth is that there is no obvious definition of overlap on a sphere... Angular overlap seems more useful than linear overlap but average overlap is not enough as each image must have enough overlap with the adjoining ones.

Georges

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## #11 2010-01-13 17:13:15

360pano
Member
From: Germany
Registered: 2009-09-22
Posts: 39
Website

### Re: PapySpheric: a Python program to build templates for panospheres

#### GURL wrote:

- Added: pitch="pp.p" yaw="yy.y" for each images in the results.

You will insert <pict and /> ?

<pict pitch="pp.p" yaw="yy.y" />

*edit*

I found it, change this lines:

#### Code:

print("#############################\n")

k= 0
for i in range(len(pitchList)) :
pitchString= '<pict pitch="' + pitchList[i] + '" yaw="'
if pitchString[7] == '-' and pitchString[9] == '.' :
pitchString= pitchString[0:10]+pitchString[11:]
for j in range(imgNbList[i]) :
yawString= imgYawList[k] + '" />'; k= k + 1;
print(pitchString + yawString)
print("")

Last edited by 360pano (2010-01-13 17:21:22)

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## #12 2010-01-13 17:52:43

claudevh
Moderator
From: Mont-Saint-André (Belgium)
Registered: 2007-11-25
Posts: 1389
Website

### Re: PapySpheric: a Python program to build templates for panospheres

Addition of 360pano ...

Very fine !

A little more step and you generate the complete PPW XML file with "preset name" and "Tooltip" ... this will be perfect really !

Claude
Merlin + Papywizard on Windows 7 & Nokia 770 § N810 & Acer (Netbook) + PanoramaApp Androïd + Deltawave PapyMerlin BT + Autopano
Spherical Pano (180 x 360) with Canon 40D + Canon EF-S 10-22mm f/3.5-4.5 Zoom & Pôle Pano with Canon 5D MK2 and shaved Tokina 10-17 3.5-4.5 AF DX Fisheye
Gigapixel photography with Nikon D200 + Sigma 70-200 F 2.8 EX DG APO HSM

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## #13 2010-01-13 18:03:14

GURL
Member
From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

#### claudevh wrote:

This "calculator" is only for "Wide Angle" , could we have the same for "Fish eyes" or may be a additional parameter for the choice between the 2 ?

Wide angle? actually the longer the lens the more useful it is because it avoids useless shoots next to zenith and nadir...

For fisheyes the easiest way is to make another version of the program. Actually, if taking into account the horizontal and vertical FOV only is OK (this is equivalent to ignore the fisheye images corners) this should be quite easy.

The resulting program (papyfish?) would be useless for circular image fisheyes. Whether it would be useful for the "rectangular image, 180 degrees diagonal fisheyes" remains to be seen. My guess is that it would be useful for the Tokina 10-17 mm zoom fisheye when used at a larger than 10 mm focal length...

Last edited by GURL (2010-01-13 18:05:14)

Georges

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## #14 2010-01-13 20:53:34

mediavets
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From: Isleham, Cambridgeshire, UK.
Registered: 2007-11-14
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### Re: PapySpheric: a Python program to build templates for panospheres

#### claudevh wrote:

A little more step and you generate the complete PPW XML file with "preset name" and "Tooltip" ... this will be perfect really !

Especially if it was a Web-based on-line tool.

Andrew Stephens
Nikon D40, Nikkor 10.5mm fisheye, Sigma 8mm f3.5 fisheye, Nikkor 18-55/50/35mm lenses, Nodal Ninja 5 Lite, Nodal Ninja 4 with R-D16, Agno's MrotatorTCS short.
Nikon P5100, CP5000, CP995, FC-E8, WC-E63,WC-E68, TC-E2, Kaidan Kiwi 995, Bophoto pano bracket, Agno's MrotatorA.
Merlin/Orion robotic pano head + Papywizard on Nokia 770/N800/N810 and Windows 8/XP/2K.

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## #15 2010-01-13 22:41:03

gkaefer
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From: Salzburg
Registered: 2009-06-09
Posts: 2674
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### Re: PapySpheric: a Python program to build templates for panospheres

#### GURL wrote:

I replaced the previous 0.0.0 by the 0.0.1 version in the above post

The most difficult part is to compute the actual overlap. I'm not satisfied with the present approximations but the truth is that there is no obvious definition of overlap on a sphere... Angular overlap seems more useful than linear overlap but average overlap is not enough as each image must have enough overlap with the adjoining ones.

if I let review my last 360 panos I made, I notice following point: How many percent overlap are finally good for an proper stitching depends in many cases on the object I do fotograph. Sky in general I can have 10% overlap - because in most cases I have to place the image manually (no difference to 20% and 25% overlap) or if papywizzard and merlin is involved placement is supported by xml paywizard logfile. In case of crowded sceens with a lot of moving people its easier for AP to erase ghosts if overlap is 25-30%. So some sort of mechanism to define different percentage of overlap for different parts of the pano would be worth considering.

Liebe Gruesse,
Georg

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## #16 2010-01-13 22:48:11

fma38
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From: Grenoble, France
Registered: 2005-12-07
Posts: 6174
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### Re: PapySpheric: a Python program to build templates for panospheres

#### gkaefer wrote:

So some sort of mechanism to define different percentage of overlap for different parts of the pano would be worth considering.

I think you will spend more time to tell which overlap you want in different areas rather than shooting 2 o 3 useless pictures

Frédéric

Canon 20D + 17-40/f4 L USM + 70-200/f4 L USM + 50/f1.4 USM
Merlin/Orion panohead + Papywizard on Nokia N800 and HP TC-1100

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## #17 2010-01-14 17:56:32

GURL
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From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

#### fma38 wrote:

I think you will spend more time to tell which overlap you want in different areas rather than shooting 2 o 3 useless pictures

Having a larger overlap next to the horizon because this is where most events happen could be an option...

In a very distant future adjacent views will be analyzed by Papywizard which will decide whether some more shots are needed to avoid ghosts (this is no a joke as a very fast camera could take a series of views to detect large moving objects crossing the images boundaries.)

Georges

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## #18 2010-01-14 18:21:59

GURL
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From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

Here is a tooltip proposal:

#### Future version wrote:

<tooltip>
Camera:
Sensor size      15.5 x 23 mm
Focal length     80 mm
Panorama:
vertical FOV     176.7 deg
images number    384
Minimum overlap  V: 20 %, H: 20 %
downward limit   -85  deg
upward limit     85  deg
</tooltip>

Suggested name: Rect80mmSpheric-90to90

The name corresponds to : rectilinear 80mm lens - Spherical pano - Pitch from -90 deg to +90 deg

I don't know which tags are useful in the followin list:

#### documentation  wrote:

<shooting mode="preset">
<cameraOrientation>portrait, landscape</cameraOrientation>
</shooting>
<camera>
<sensor coef="[float]" ratio="[ratio]"/>
</camera>
<lens type=rectilinear>
<focal>[float]</focal>
</lens>
<preset name="[str]" />

<shoot>
<pict id="[int]">
<position pitch="[float]" yaw="[float]" roll="[float]"/>
</pict>
...
</shoot>

Georges

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## #19 2010-01-15 07:49:30

fma38
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From: Grenoble, France
Registered: 2005-12-07
Posts: 6174
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### Re: PapySpheric: a Python program to build templates for panospheres

USefull for APP, you mean? I don't know what tags are really used... Only Alexandre can tell...

BTW, Georges, you should use the xml.dom.minidom module to generate your xml file; this is much easier. Have a look in http://www.papywizard.org/browser/trunk … el/data.py for a example.

Frédéric

Canon 20D + 17-40/f4 L USM + 70-200/f4 L USM + 50/f1.4 USM
Merlin/Orion panohead + Papywizard on Nokia N800 and HP TC-1100

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## #20 2010-01-15 16:21:20

GURL
Member
From: Grenoble
Registered: 2005-12-06
Posts: 3501

### Re: PapySpheric: a Python program to build templates for panospheres

#### fma38 wrote:

Useful for APP, you mean? I don't know what tags are really used... Only Alexandre can tell...

No, I mean useful for Papywizard... actually, I don't even know how the preset content is fed into Papywyzard  (but hope long presets are not to be entered manually!)

#### fma38 wrote:

BTW, Georges, you should use the xml.dom.minidom module to generate your xml file; this is much easier. Have a look in http://www.papywizard.org/browser/trunk … el/data.py for a example.

Ah ben si c'est simple ça m'encourage pas. En fait je suis un complet débutant Python: je ne sais ni lire ni écrire un fichier et encore moins intéragir avec l'extérieur à travers une interface (les seuls outils dans le genre que je connaisse c'est Javascript (qui ne peut pas écrire de fichier) et Visual Basic qui... (bon, qui ne fait pas l'affaire!)

Georges

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## #21 2010-01-15 16:35:49

fma38
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From: Grenoble, France
Registered: 2005-12-07
Posts: 6174
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### Re: PapySpheric: a Python program to build templates for panospheres

Pour ce qui est de lire/écrire des fichiers, c'est vraiment trivial :

#### Code:

# lire toutes les lignes d'un fichier
f = file("titi.txt")
for line in f:
print line

# écrire un fichier
f = file("titi.txt", "w")
f.write("ligne 1\n")
f.write("ligne 2\n")
f.close()

Pour générer du xml, tu construis ton arbre en mémoire (noeuds, sous-noeuds), puis tu le sérializes sous forme de chaine, ou directement sur disque.

Par contre, pour ce qui est d'interagir avec l'utilisateur, c'est toujours la partie chiante. Python dispose en standard d'un toolkit graphique, Tkinter, basé sur Tk. Ce n'est certes pas le mieux, mais pour débuter, c'est bien pratique. Et surtout, pour distribuer ton code, tu n'as pas à te casser la tête à packager un toolkit externe (si tout le monde utilisait linux, ça ne poserait pas de problème, puisque la plupart des distributions intègrent tous les principaux toolkit et permettent de les installer en 3 clicks, mais il y a Windows et MacOS, où c'est la croix et la bannière pour faire le moindre truc).

Plus d'infos sur Tkinter :

http://www.pythonware.com/library/tkinter/introduction

Et n'hésite pas à me contacter en privé pour des renseignements plus précis, sur Tkinter ou xml...

Frédéric

Canon 20D + 17-40/f4 L USM + 70-200/f4 L USM + 50/f1.4 USM
Merlin/Orion panohead + Papywizard on Nokia N800 and HP TC-1100

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## #22 2010-02-01 13:42:24

mediavets
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From: Isleham, Cambridgeshire, UK.
Registered: 2007-11-14
Posts: 9711
Website

### Re: PapySpheric: a Python program to build templates for panospheres

#### fma38 wrote:

I think you will spend more time to tell which overlap you want in different areas rather than shooting 2 o 3 useless pictures

Having a larger overlap next to the horizon because this is where most events happen could be an option...

In a very distant future adjacent views will be analyzed by Papywizard which will decide whether some more shots are needed to avoid ghosts (this is no a joke as a very fast camera could take a series of views to detect large moving objects crossing the images boundaries.)

Georges,

I don't begin to understand how to use your program. I was hoping it might be an on-line tool by now that, from appropriate input data, could/would generate a Papywizard preset file, but I think not yet?

Howver it sounds to be just what I need to configure preset for use with my Nikon D40 (1.5x crop) and 50mm and 35mm rectilinear lenses so I canc experiment shooting some higher res. spherical panos on the Merlin.

Could you calculate the shooting position values for me?

...........

BTW you are not alone in creating a program with such a goal:
http://panorama-factory.ch/_English/e_M … rview.html

Something like his version for the Rodeon Modular, but for Papywizard+Merlin, would be interesting:
http://panorama-factory.ch/_English/e_M … dular.html

Andrew Stephens
Nikon D40, Nikkor 10.5mm fisheye, Sigma 8mm f3.5 fisheye, Nikkor 18-55/50/35mm lenses, Nodal Ninja 5 Lite, Nodal Ninja 4 with R-D16, Agno's MrotatorTCS short.
Nikon P5100, CP5000, CP995, FC-E8, WC-E63,WC-E68, TC-E2, Kaidan Kiwi 995, Bophoto pano bracket, Agno's MrotatorA.
Merlin/Orion robotic pano head + Papywizard on Nokia 770/N800/N810 and Windows 8/XP/2K.

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## #23 2010-02-07 22:56:20

solock
Member
From: lehigh valley pa
Registered: 2009-04-14
Posts: 64
Website

### Re: PapySpheric: a Python program to build templates for panospheres

This is looking very useful, just must be missing something.

Python installed, copied the code and saved as a .py file

module runs, makes the output, but...

what to do with the output to make it be loadable as a preset on papy??

Does it need some further conversion?

Sorry for being dense here...

Thanks,

Steve

Canon 50D, 20D, 1D MKII
Tok 10-17FishEye,Canon 10-22, 24-70 2.8, 50 1.4, 70-200 2.8IS, 300 2.8,1.4x,2.0x
303SPH, Panosaurus, Merlin+Parallax Bluetooth+USB to PC and Nokia N810

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## #24 2010-02-07 23:20:51

mediavets
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From: Isleham, Cambridgeshire, UK.
Registered: 2007-11-14
Posts: 9711
Website

### Re: PapySpheric: a Python program to build templates for panospheres

#### solock wrote:

This is looking very useful, just must be missing something.

Python installed, copied the code and saved as a .py file

module runs, makes the output, but...

what to do with the output to make it be loadable as a preset on papy??

Does it need some further conversion?

Sorry for being dense here...

Thanks,

Steve

Look here to see what the format of a custom preset looks like:
http://www.papywizard.org/wiki/UserGuid … tompresets

You should be able to use the output to create one.

Ignore the stuff about having to place the preset file in a particular location - that's only if you wish your new preset to appear in the default set.

Otherwise the custom preset file(s) can be named anything-you-like.xml and placed anywhere in the file system Then use the Papywizard File/Load preset to load custom preset file(s) on a per session basis.

Does this help?

Last edited by mediavets (2010-02-07 23:22:11)

Andrew Stephens
Nikon D40, Nikkor 10.5mm fisheye, Sigma 8mm f3.5 fisheye, Nikkor 18-55/50/35mm lenses, Nodal Ninja 5 Lite, Nodal Ninja 4 with R-D16, Agno's MrotatorTCS short.
Nikon P5100, CP5000, CP995, FC-E8, WC-E63,WC-E68, TC-E2, Kaidan Kiwi 995, Bophoto pano bracket, Agno's MrotatorA.
Merlin/Orion robotic pano head + Papywizard on Nokia 770/N800/N810 and Windows 8/XP/2K.

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## #25 2010-02-07 23:56:18

solock
Member
From: lehigh valley pa
Registered: 2009-04-14
Posts: 64
Website

### Re: PapySpheric: a Python program to build templates for panospheres

got it, thanks ..

so make a master xml, as per the standard

run this python app

cut and paste the tooltip for description into new xml

cut and paste the pitch & yaw portion into new xml

save as new preset & import

than helps alot...

Now to make a master preset set for my anticipated shoots...

Again, thanks for all the help...

Canon 50D, 20D, 1D MKII
Tok 10-17FishEye,Canon 10-22, 24-70 2.8, 50 1.4, 70-200 2.8IS, 300 2.8,1.4x,2.0x
303SPH, Panosaurus, Merlin+Parallax Bluetooth+USB to PC and Nokia N810

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