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APP/APG v2.0 Application Settings

This dialog will allow you to set all the software preferences as well as the default settings for many tools. You can open the dialog using one of the following depending on your operating system:

  • Icon-windows-32.png : Edit Menu, Settings
  • Icon-apple-32.png : Autopano Pro Menu, Settings

This dialog is divided into 6 tabs.


General Tab
  • Temporary Folder: here you can choose a path to a folder used by Autopano to store its temporary files. If you have multiple physical drives on your computer then choose the one you purchased last as it is probably the fastest drive on your system and the one with the largest amount of free space. The choice you make here can be very important if you are stitching very large panoramas (even more if you use the PSD/PSB multi-layer format).
  • Memory Used: used to set some parameters influencing the use of the system memory
    • Cache size: this parameter enables you to adjust the amount of RAM used to speed-up the panorama display either in the panorama editor either during the rendering process. The correct value depends on the specifications of your computer but as a rule of thumb using a value of 15% of the total RAM is a good starting point. If the hardware has low RAM ( 1GB or 2GB ) and you want to create big panoramas, it's highly advised to change this setting to a low value ( 50 MB max ).
    • During rendering: this setting changes the rendering engine configuration by allowing it to use different amounts of system memory.
  • Language: this setting is used to force a different interface language than the OS language in the software.
  • Number of CPU: the Autopano Pro rendering engine is compatible with modern multi-core and multiprocessors systems. By default the software will choose to use the maximum computing power of the host machine (example: 2 CPUs for a dual core system).
  • GPU processing:
    • Enable : enable this option to use GPU hardware acceleration and benefit from real time editing in the panorama editor.
    • Check: use this button to check if your video card is compatible with Autopano Pro and/or Autopano Giga. Both images in the "Render" tab should be identical.
Info tab
Onglet Render tab


Images tab

This set of options is related to the images EXIF data. Note the EXIF data of the original images will not be altered by the modifications you can make here.

Two options are offered:

  • Use the following value if no Exif data is found: The focal length value and the lens type set here will be applied to images that not have EXIF data available.
  • Always force the following Exif value: The focal length value and the lens type set here will be applied to all images no matter what (with or without Exif).


Detection tab

The settings in this dialog influence the way the source images are stitched together.

  • Detection Quality
    • Low is a good compromise between control points quality and detection speed.
    • Standard (default) increases control points density but slows down detection speed. In the case of a set of images presenting a small overlapping ratio this option can enhance the detection quality on the overall panorama. It is also used with panoramas presenting a lot a bracketing.
    • High very slow, mostly reserved to desperate cases (… worth a try before giving up).
  • Control Points / Image Pair : This is the number of control points used per image pair. Influences the number of control points exported to PanoTools as well as the overall detection quality.
  • Links Layout:
    • Free (default): This setting applies no shooting constraint (several rows and columns) to the detection process. Autopano is looking for all possible links between all images. It is possible that when using this mode the software will come up with “real false” links meaning that some images are indeed linked because they are very similar but in fact are not located beside one another (Example: a courtyard can present a lot of similarities because of its architectural symmetry). It will then be necessary to correct those wrong links using the Control Points Editor.
    • Single Row or Column: This only applies when the source images were shot consecutively. For example from left to right; in a row. Using this mode avoids the occurrence of “real false” links resulting from image similarities.
    • List all Models : Works with the Extended Save As.... This makes possible to use the links found between the images in a previous detection as a template for a new detection (assuming the source images were shot in the same pattern) in order to avoid ending up with real “false” links.
  • Force every image to be in one panorama: This option is useful when, as it happens with some panoramas, one or several source images are left out. This does not per say enhance the detection quality but instead will force the software to include this or these ignored image(s) in the panorama even if they do not present any links with the other images.
  • Detect links in:
    • One stack level (default): The software will look for all possible links between all images belonging to the same stack.
    • All stack levels: Autopano will look for all possible links between all images.
  • Project: You can here change the target folder along with the syntax used to name the project files.
    • Folder: the target folder where the project files will be saved when using the Save and close auto mode
    • Use relative path for image location in project:
    • Filename: the name of the .pano project file is generated using a special syntax template entered here.
  • Automate: Autopano can, by itself and a in a fully automated way, produce large quantities of panoramas. This set of options let you choose the software default behavior.
    • Auto crop: the panorama is automatically cropped to leave no empty area inside the resulting image boundaries.
    • Auto color correction (default): automatically compensate for color variations between source images.
    • Auto color histogram: apply an auto color level filter.
    • Auto render: automatically launch the final rendering process once the panorama detection task is completed.
    • Auto save: automatically save the panorama once the detection task is completed.
    • Auto close: automatically close the panorama once the detection task is completed. This option is often combined with Auto save.


Onglet Optimization

This set of parameters determines how the panorama will be optimized. It is during the optimization step that each image position is computed based on the control points it holds. By default only the optimization profiles are displayed in the dialog. The Advanced Options are only displayed if you click on the "Show Advanced Options" button.

Four (4) optimization profiles are available:

  • Quick: this will perform a very fast optimization that can possibly fail if some bad image links exist in the panorama.
  • Strong: (default) suited for most stitching projects. This profiles leaves room for intervention in case some bad links exist but, as a trade-off, is slower.
  • Gigapixel: select this profile for all projects over 200 images.
  • Fisheye: select this profile for any project using fisheye images.

These profiles are presets for the several optimization steps.

  • Options
    • Use grid position: this option will only be available after an import from a panoramic shooting head that will provide the images coordinates (typically Papywizard or Clauss). This option will then be active and will let the optimization engine know if it needs (or not) to take the images coordinates in account during the optimization process.
    • Assume row/column shooting: was the shooting performed in a row/column pattern or not? This option is activated for panoramas issued from a Gigapan shooting head. We suggest using this option only in that particular case because this mode needs enhanced accuracy during the shooting process (n row, p column). It is best not to use this option if you find yourself with an extra source image in one row or in one column, or if the spacing between two consecutive rows varies too much.
  • Optimizer stages
    • 1) Local approach: this is a very fast algorithm that allow for a local pre-location of the images.
    • 2) First optimization: this is the main optimizer, taking all links into account in a global way.
    • 3) Clean up control points or links:
      • Keep only control points below this error (RMS): useful when only quality matters.
      • Keep only the N best control points: useful when only the number of control points per image matters.
      • Remove links over this error (RMS): useful when only links quality matters.
    • 4) Final optimization: the same main optimizer used in stage 2 is called upon (if it hasn't been yet) or recalled upon (to take into account de deletions performed in stage 3).
    • 5) Adjust lens distortion: this option allows for lens distortion correction (very useful on short and medium focal length). It is better to uncheck this option if you are stitching a gigapixel panorama as it will slow down the detection process.
      • Advanced distortion: allow for better distortion correction on fisheye lenses


Panorama tab

These options influence the panorama’s creation once the detection process is completed. They act on the panorama appearance and define the default color correction settings.

Panorama layout

  • Preferred Projection:
    let you choose the default projection type:
    • Automatic: the software automatically chooses the most suitable projection type among Spherical, Cylindrical and Planar. The choice is determined by the panorama’s FOV.
      • If the horizontal FOV is smaller than 120° and the vertical FOV is smaller than 90° then the Planar projection will be chosen.
      • If the horizontal FOV is greater than 120° and the vertical FOV is smaller than 90° then the Cylindrical projection will be chosen.
      • In all other cases the Spherical projection will be the preferred choice.

You can force a projection type to be the software’s default. Be careful however, as if your panorama is 360° and you choose a Planar projection, only a small part of the panorama will be displayed.

  • Preferred Extend: allow to choose the default panorama size.
    • Clamp to panorama content:
      the final size of the panorama will be the full area containing no empty pixels.
      Clamp to panorama content
    • Maximum projection range:
      the size of the panorama will be the full projection mode surface.
      The projection area for a Spherical projection is 360°x180°, for a Cylindrical projection 360° x 162° maximum, and 162° x 162° maximum for a Planar projection.
      This setting is useful if you always want to generate 360°x180° panoramas even with partial panoramas that do not cover the whole projection area (360°x91.03°).
      Maximum projection range

Color Correction

This setting allows you to choose the default color correction mode when the Auto color correction is activated.


Render tab

At first this tab seems to duplicate the Render Panorama dialog. In reality this tab enables you to set the default values that will populate the Render Panorama dialog when clicking on the Render button. Therefore, we will find in this tab almost the same parameters as in the Render Panorama dialog:

  • The size expressed in percentage (percentage in regard of the size of the panorama if the source images are neither shrunk nor enlarged).
  • Interpolation mode choice.
  • Blending mode choice
  • Output file format for the rendered panorama.

To get a detailed description of these parameters please check the Render Settings page.

  • Output: these two boxes allow you to choose where the output file will be saved and how it twill be named.
    • Folder: here you can specify the target folder where you want the final image saved.
    • Filename: default syntax used to name the output file (click on the "?" icon to obtain the syntax explanation).
  • Render Done Sound: easy enough to understand, this allow you have your computer play a sound (or not) when the rendering process is completed. Sound files in .wav format are supported.