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I have a lot of .png images, and I want to replace a color to another color..
Is there a batch program to do that? I'm on Windows 7

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You need to update your question and make it clearer with more detail about your issue. Are you changing colours in a palette, in Microsoft/Mac/Linux OS itself or in a specific program? –  Dave Aug 13 '12 at 7:56
    
@DaveRook I updated the question –  TTem Aug 13 '12 at 8:03
    
Do you want to programmatically change one colour for another, in a series of PNG images? –  user3463 Aug 13 '12 at 8:04

1 Answer 1

I think the same answer I gave you here can be applied to this question as well.

It depends on what graphical programs you have, but Photoshop Elements is fairly cheap and you can batch process.

The issue is it really depends on how complex your .png images are - for example, if your images are just black and white then this should be be quite an easy task with accurate results - however, if your image is a picture with various hues and shades of colours this task becomes more complicated and batch processing may not be possible. For example, you want to replace green with red. Well, what shade of green? Some green's have yellow in and where some may describe a colour as 'yellowy green' others may describe it as a 'greeny yellow'... This obviously makes direct colour chnage over a range of colours more difficult to define. Therefore, it may even require part batch and part manual.

This is of course assuming you know how to use these type of programs.

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