CODEWITHSUNDEEP
pythonopencvnumpy
ytrewq
ytrewq

Reputation: 3930

opencv: writing pixels to image

I have a 48x48 list of piexl values, which I want to write as a grayscale image file.

To do so, I'm converting the list to numpy array and use imwrite.

import cv2
from numpy import array
......
#pix is a 48x48 list containing pixel values
pix = array(pix)
cv2.imwrite('test.jpg',pix)

However, it returns the following error

Traceback (most recent call last):
  File "face_detect.py", line 20, in <module>
    cv2.imwrite('test.jpg',pix)
TypeError: img data type = 18 is not supported

It obviously has to do with datatype, but what should the second argument of imwrite be if not a numpy array?

Upvotes: 1

Views: 961

Answers (1)

ytrewq
ytrewq

Reputation: 3930

I found out the problem, both to the post and my comment below it.

I read the values from a csv file where the numbers were separated by spaces. I used line.split() to break them into separate numbers, but actually I was still treating them as strings.

So all I had to do was to convert them to integers. I didn't need to normalize it either , 0~255 is right.

That was pretty dumb of mine, but in case anybody had the same problem.

Upvotes: 2

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