Reading a 32 bit image

[rolfk]

I would not even bother with external tools. It's trivial enough to detect the 32 bit depth of an image when using the Read PNG File.vi and then removing the Alpha channel, effectively creating a 24 bit image. You probably will want to use the extracted alpha channel to mask out the color pixels appropriately.

[zou · Accepted solution]

If you take a close look of this image, all 3 channels (R, G, B) are just 0.  Which is a black image.

All the information is in the alpha channel.

So forget about the 0s, just use the alpha channel, you can get the 24bit image like this: