Quick question about Flare and Stitching  

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jonvillaamrita
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Quick question about Flare and Stitching

by jonvillaamrita » Fri Jan 24, 2014 4:57 am

I have a question. I am new to this pano and virtual tour industry. Take a look at this pano http://www.infiniteaerial.com/panorama/ ... index.html

do you see the "chandelier" (main light above in the living room there), it tends to "flare" even though I do bracketing. What is the technique to reduce that? Would you use a hood or a filter? What will reduce that?

also, can you tell me in your experience, very generally speaking, how many errors or 'stitch problems' do you think are acceptable in your 'normal' pano (before processing)? Is it 2 or 5 or 6? can you put a number on it? Or does it vary with the subject? We can find that some panos stitch virtually perfectly, while others have 2 tiny "problems" or some have 5 or 6. Do you have any wisdom to share? I want to get a feel for whether I am "in the ball park" in terms of stitch quality.

as you probably know, its a bit like groping around in the dark at the beginning here. so i really appreciate any feedback at all!

thanks

Jon

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Destiny
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Re: Quick question about Flare and Stitching

by Destiny » Fri Jan 24, 2014 5:13 am

Hi... What are your EVs.. How many shots are you capturing... What software are you using to fuse....

To me your images are not taking advantage of Exposure Fusion... Or you EVs are too low..

If your stitching is developing errors, you need to look at your Nodal Point to ensure its set correctly..
There are heaps of webs sites on how to set it.. You need to use a methods that works for you....

Destiny...
Last edited by Destiny on Fri Jan 24, 2014 7:03 am, edited 1 time in total.

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Destiny
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Re: Quick question about Flare and Stitching

by Destiny » Fri Jan 24, 2014 7:01 am

.. This will help to understand what the Nodal Point is.. There are many graphics and video to assist in setting it correctly..

http://www.red-door.co.uk/pages/product ... point.html

Destiny...

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mediavets
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Re: Quick question about Flare and Stitching

by mediavets » Fri Jan 24, 2014 8:19 am

jonvillaamrita wrote:also, can you tell me in your experience, very generally speaking, how many errors or 'stitch problems' do you think are acceptable in your 'normal' pano (before processing)? Is it 2 or 5 or 6? can you put a number on it? Or does it vary with the subject? We can find that some panos stitch virtually perfectly, while others have 2 tiny "problems" or some have 5 or 6. Do you have any wisdom to share? I want to get a feel for whether I am "in the ball park" in terms of stitch quality.


What camera and lens and pano head are you using?

What is your shooting pattern?

If you use exposure bracketing how many shots and what exposure range?

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jonvillaamrita
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Re: Quick question about Flare and Stitching

by jonvillaamrita » Fri Jan 24, 2014 2:00 pm

Thanks or your reply! Yes, the video on Red Door I have watched. It was very useful.

My EVs are EV1 ( EV -1 | EV 0 | EV +1 ), wherein I produced 3 image with different exposure.

Question :
- EV not enough yet? What are the correct EVs to get perfect exposure on 360 VR? Maybe go more to EV3?

Question : How many shots are you capturing?
On that sample Im using, Canon 40D with Canon lens 20mm, I got 37 shoots | 37 x 3 (EV1) = 111 shots

Also I'm using,
Canon 5D MK2 with Canon lens 20mm, I got 16 shoots | 16 x 3 (EV1) = 48 shots

I have a question for you. Mostly, how many shots do you capture for one pano scene?

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Destiny
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Re: Quick question about Flare and Stitching

by Destiny » Fri Jan 24, 2014 2:52 pm

The flare is understandable with only 3 shots and +/-1 EV.. .. I do a minim of 5... often 7 to 9... depending on the light.. If even light, not too many bright or dark spots, then I would go 5 bracketed shots.. If however, there was a chance of blowout of light I would go 7 to 9.. EVs would also vary.. If your camera cannot coup there is software to hook up to a Laptop or a Promote Control will do the job, apparently. I use a VR Drive with HDR software which has huge options so I do not need one.. http://www.promotesystems.com/products/ ... ntrol.html

Destiny..

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mediavets
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Re: Quick question about Flare and Stitching

by mediavets » Fri Jan 24, 2014 3:40 pm

jonvillaamrita wrote:
I have a question for you. Mostly, how many shots do you capture for one pano scene?

I mostly use fisheye lenses so max. of 8 x no.of exposure brackets.

I have a Promote Control so that offers very flexible bracketing options, far in excess of any AEB built in to any DSLR.

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Re: Quick question about Flare and Stitching

by gkaefer » Fri Jan 24, 2014 4:36 pm

mediavets wrote:
jonvillaamrita wrote:
I have a question for you. Mostly, how many shots do you capture for one pano scene?

I mostly use fisheye lenses so max. of 8 x no.of exposure brackets.

I have a Promote Control so that offers very flexible bracketing options, far in excess of any AEB built in to any DSLR.


best Investment ever I made: http://www.hdrlabs.com/book/
the one and only - holy grale and whichever Superlative is available ;-))
only take the second Edition and only use the english language Version of the printed book edition!

maybe your cam is included: http://hdr-photography.com/aeb.html
Andrews referenced it already, if you use Canon or Nikon, than this is very recommended also from my side: http://www.promotesystems.com/

EV-Values Table: http://www.night-ray.com/PhotoCheatSheet.pdf

Georg


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