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On trying to extract the alphachannel from a image with a blackbackground,XNconvert doesn't convert black to alpha.
Is there any other way to achieve this?

Also are there any other softwares which allow batch conversion to alpha channel?

Output has no transparency - Black Background Black Texture

XNconvert Output XNconvert

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  • I'm not sure what exactly you are trying to do here. What is the desired end result? I'm not familiar with XNconvert, but it seems you ask the program to extract the alpha channel (if any). That should result in a grayscale image with no transparency. Are you trying to make all black transparent, so you end up with an image of the white shape with transparent background?
    – Wolff
    Jul 11, 2021 at 9:52

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If I understand you correctly, you seem to want to make an image of the white shape, where the black parts are transparent.

I don't normally use XnConvert. I just downloaded it, and was able to find this solution:

First add a Levels action. Pull the white slider all the way to the left to make the image completely white.

Then add a Add mask action. Use the image as the mask.

The problem is, that this of course can't easily be batched because you need to choose the image for the mask for each image.


I would normally use Photoshop for something like this, but if you don't have access to that, I'm sure the free ImageMagick could be used to achieve what you want.

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  • Yeah,this works great,barring for the batch export.... I am trying to achieve this with ImageMagick but the greyscale opacity is rendered as Opaque Black.
    – srt111
    Jul 11, 2021 at 11:27
  • @starzar, I don't really know ImageMagick or how you are trying to use it, but basically what you want to do is: move/map for example the red channel to the alpha channel and then make both the red, green and blue channel all white.
    – Wolff
    Jul 11, 2021 at 11:58
  • Just a sec.. I will post it as a question .
    – srt111
    Jul 11, 2021 at 12:25

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