Matplotlib Changes Jpg Image Color

I'm reading images from filesystem using matplotlib imread function. However, it changes jpg image color when it displays those images. [Python 3.5, Anaconda3 4.3, matplotlib2.0] #

Solution 1:

matplotlib.image.imread or matplotlib.pyplot.imread read the image as unsigned integer array. You then implicitely convert it to float.

matplotlib.pyplot.imshow interpretes arrays in both formats differently.

• float arrays are interpreted between 0.0 (no color) and 1.0 (full color).
• integer arrays are interpreted between 0 and 255.

The two options you have are thus:

1. Use an integer array

   test_imgs = np.empty((5,32,32,3), dtype=np.uint8)
   

2. divide the array by 255. prior to plotting:

   test_imgs = test_imgs/255.
   

Solution 2:

Matplotlib reads image in RGB format whereas if you use opencv it reads image in BGR format. First convert your .jpg image in RGB and then try displaying it. It worked for me.