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How multiband blending and color correction work



Introduction


The role of the blending is to define how the pixels of each image will be merged. Multiband blending allows blending the overall color of the images and mitigate the differences in the scale and/or the exposure existing between the juxtaposed images to remove sharp differences in the exposure between pictures and get a panorama as homogeneous as possible.



Example to show how it works


  • Here is a panorama composed of 6 pictures with exaggerated green, red and blue colors


Original pictures

Sample panorama

There is no color correction nor multiband blending.


  • Color correction is being applied without blending. See how Autopano merge colors


Click to animate
Color correction without blending


Original pictures before/after color correction is applied in the editor

Color correction without blending



  • Multiband blending is being applied without color correction. See how the multiband blending merge and mitigate colors and exposure


Click to animate
Multiband blending without color correction




  • Multiband blending and color correction are being applied (same settings as described below)


Click to animate
Multiband blending and color correction applied




Once rendered (using the pictures with exaggerated colors)

  • Settings used:
    • Color Correction (Auto): Exposure, color, gradient
    • Blending: Multiband level 0 (this level number corresponds to the total width of the image Autopano uses to do the blending, so the blending is maximum). The default value is "-2" which corresponds to 1/4 of the real size of the image Autopano will use to do the blending


Rendered panorama


Further details about blending is available here







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