AP - Weird histogram pixel count

[bures]

I have image with two colors (black and white). I try to count quantity pixels of each color. But the numbers are weird, bigger than sum of image pixels (1446 + 864 vs. 770). See the picture. Could someone explain to me what the numbers means?

flg_cz-2.bmp

[MEB]

This is a 1 bit image (which we don't support). Affinity is reading it as an RGB image which means the white/black is represented by three colours/channels (red, green and blue). If you divide the values you are getting by 3 (864:3 for white = 288 and 1446:3 for black = 482) and sum both results you get the 770 pixels the histogram is reporting as the total.

[bures]

Thanks for explanation. It makes sense. Sadly the program behaviour is confusing because there are two "pixels" values under the histogram. Pixels at 4th row tells good value (770 image pixels) but second row not.

When I create new Gray/8 (Greyscale D50) image with white background I do not see any white pixels in histogram. The same situation is with RGB/8 image.

[MEB]

Is the "white" coming from the canvas itself? if so there's no actual data there - it's just an empty canvas. Go to Document > Transparent Background to see what I mean. If you fill it with white using the Flood Fill Tool the histogram should reflect it.

[bures]

Thanks for reply to my second paragraph.

Can you tell me your opinion about this:

Quote

Sadly the program behaviour is confusing because there are two "pixels" values under the histogram. Pixels at 4th row tells "good" value (770 image pixels) but second row not.