PIL.Image.open only shows two colors while opening a PNG File

Question

I am trying to open images (.png) using PIL. However, It only shows images only in two colours.

Original image (i.e. 3.24 MB). I reduced the size since system only allows us to upload below 2MB:

When I run image = Image.open('path/image') , it gives this:

when I run the same but with convert, image = Image.open('path/image').convert('L') I get this:

Here is the way how i plot images:

fig,ax = plt.subplots()
ax.imshow(image)
ax.grid(False)

I have tried dozens of images. No change. I strongly guess the problem caused by the image channels. Function somehow reads the 3-channels as single-channel or the other way around. Any ideas how to fix???

Edit: So I got closer to the result i want. I convert the iamge into an array first. But it still is not enough.

here is the code:

image = Image.open(df['Path'][0])
image = np.asarray(image)
plt.imshow(image)

See here... https://stackoverflow.com/a/52307690/2836621 and try `ax.imshow( ... cmap='gray')` — Mark Setchell, Oct 14 '20 at 15:41
(array([ 160884, 117, 131, 141, 0, 106, 237, 0, 113, 3073087]), array([ 0. , 25.5, 51. , 76.5, 102. , 127.5, 153. , 178.5, 204. , 229.5, 255. ])) — vagitus, Oct 16 '20 at 13:08

score 0 · Answer 1 · answered Oct 16 '20 at 13:29

0

Finally solved it. Transformed the image to array and read the values by cmap. Here is the full code and the result:

image = Image.open('/path/image')
image = np.asarray(image)
plt.imshow(np.abs(image), cmap = 'gray')

answered Oct 16 '20 at 13:29

vagitus

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PIL.Image.open only shows two colors while opening a PNG File

1 Answers1