Dear All, I have a tif images, its type is float32, shape is (128*128) (a grayscale image). All the pixel values are of range [0.0, 1.0] I am trying to read it using skimage and show it on screen using matplotlib . from skimage import ioimport matplotlib.pyplot as plt output=io.imread(os.path.join(image_path,raw_image_name))print(output.dtype)print(output.shape)print(output.max())print(output.min()) plt.imshow(output) plt.show() The output image looks like color image instead of gray image as shown originally. I attached the screenshot as the capture-1.jpg. However, when I read the image using matplotlib instead,i.e., output=plt.imread(os.path.join(image_path,raw_image_name)). I found that pixel value will become 255 and 0. The dtype is still float32. But when I print output, the pixel values are either 0. or 255. The output image will become black as shown in the second image (capture-2.jpg). I am confused how does this work? My guess is that there are some dtype changes happening during the reading image and showing image, Thanks, Yuanyuan