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

[brendan-duncan]

Probably a 16-bit image. You can convert it to an 8-bit image first. Image u8 = image.convert(format: Format.uint8);

[cuishijie1991]

Probably a 16-bit image. You can convert it to an 8-bit image first. Image u8 = image.convert(format: Format.uint8);

Thank u, it works for me !