CODEWITHSUNDEEP
pythonpython-3.xopencvmatplotlib
4daJKong
4daJKong

Reputation: 2045

how to show RGB images in python

I have a RGB dataset like that:

   [[ 255 165 0]
    [255 255 0]
    [0  255 0]]

I want to show each row's color,separate 3 PNG images, each 64x64 pixels Is there some method existed in matplotlib or opencv?

Upvotes: 1

Views: 917

Answers (1)

Mark Setchell
Mark Setchell

Reputation: 207405

In OpenCV (and most other Python imaging libraries) an image is represented by a Numpy array. So, if you want to make a 3-channel (i.e. colour) image full of [255, 165, 0] you just need:

import cv2
import numpy as np

# Make 64x64 pixel colour image
im = np.full((64,64,3), [255,165,0], dtype=np.uint8)

# Save to disk
cv2.imwrite('result.png', im)

Note that OpenCV uses BGR ordering, so if your 3 values are in fact RGB, you need:

im = np.full((64,64,3), [0,165,255], dtype=np.uint8)

Upvotes: 3

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