Pixel RGB value is larger than 255 with iOS screenShot Image

[cuishijie1991]

Hello, I am using image v4.2.0 to binarize images. But when testing iOS app, I encountered a headache: when I selected a screenshot from the album, I tried to use pixel to get the r, g, b value, but found that its value was not 0-255, which made it impossible for me to binarize it. If it is not an iOS screenshot picture, the rgb value obtained is correct. In addition, I sent this picture to my android 14 phone, and it also had a similar problem. This problem did not occur when using image v3, and after testing, the same iOS screenshot, v3 can correctly obtain r, g, b values ​​between 0-255. I don't know what v4 does, but I hope you can help check this problem, or tell me how to use v4's api correctly, thank you very much! In addition, I am using flutter v3.16.9, image v4.2.0, and the iOS test machine is iphoneX (16.1.2)

for (int y = 0; y < image.height; y++) { for (int x = 0; x < image.width; x++) { imgLib.Pixel pixel = image.getPixel(x, y); if (x == 0 && y == 0) { print("@@@${pixel.r},${pixel.g},${pixel.b}"); } } }

log=> flutter: @@@54434,42598,20770