CODEWITHSUNDEEP
pythonopencvmatplotlibimage-processingcolormap
Daniel Agam
Daniel Agam

Reputation: 209

Unclear difference in displaying the same image by opencv and matplotlib

During my work on image processing I encounter a strange phenomenon that is not clear to me.

I have an image with dimensions of: (256, 256, 1) And when I display it with opencv using the following code:

cv2.imshow('image', image)
cv2.waitKey()

I get the following result:

image from opencv

In contrast, when I display it with matplotlib using the following code:

plt.imshow(image, cmap="gray")

I get the following result:

image output from matplotlib

The second result is the desired one as far as I'm concerned - my question is how to make the image like this (by code only and without the need to save to a file and load the image) and make it so that I get the same image in opencv as well.

I researched the issue but did not find a solution.

This reference helps me understand the reason in general but I'm still don't know how to show the image in opencv like matplotlib view in this case.

Thank you!

Upvotes: 1

Views: 336

Answers (1)

Daniel Agam
Daniel Agam

Reputation: 209

I post the answer in this link, Also copy to here:

   int_image = image.astype(np.uint8)

    cv2.imshow('image', int_image)
    cv2.waitKey()
    plt.imshow(image, cmap="gray")
    plt.title("image")
    plt.show()

Now - The 2 plots are same.

Hope this helps more people in the future

Upvotes: 1

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