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General / Primary channel and masks at the orthomosaic stage
« on: November 08, 2021, 12:13:58 PM »
I am processing multicamera system and some images are overexposed. There is certain chance such areas are not overexposed in neighbouring images. My idea is to apply masks to overexposed areas so that they won't be used in orthomosaic.
The question arise: does MS use EACH channel masks at orthomosaic stage or it only uses PRIMARY CHANNEL masks to all the channels?

As I can suppose from seamlines, MS only uses primary channel masks.
Is there any option to independently apply masks to separate channels at the orthomosaic stage?  Masks are generated for each image, separate channels are stored in separate images.

I have a backup plan - to generate 5 single-channel orthos (with different primary channels) and then merge outside MS but I think it is an interesting issue to discuss here.

I've just noticed that Raster Calculator delivers incorrect result in case there is at least one floating point multiplier in the transform formula.

For example, let's compare the following:
1. 1.5*B1 vs (3/2)*B1   
(1.5*B1 results the same as B1 )

2. 2.99*B1 vs 3*B1   -  I can see that 2.99*B1 results the same as 2*B1

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