How to create an image from a Matrix using opencv python?

Question

I have a matrix m filled as below(condensed version). Can you please help me to create a image from it. Such that I want all 10 in the matrix to be in different color.

m = np.array([[ 1 0 .... -1 10],  [ 10,0, ..... 0, 10] .... ]])

The dimension of this matrix is x rows and y columns.

To make it simple, I don't need a color image.

import cv2
import numpy as np
img = np.random.randint(222, size=(100, 100,3))
gen = np.array(img ,dtype=np.uint8)
cv2.imshow('i',img)
cv2.waitKey(0)
cv2.destroyWindow('i')

In python opencv, images are just numpy arrays. So your m matrix is already an image, just define image type when creating array: np.array([[...]],dtype=np.uint8). Use cv2.imshow('image',m) to display it. — zindarod
– zindarod, Commented Nov 11, 2017 at 21:55
@zindarod - I tried like you said it plots a black image. Please check my sample code. — ajayramesh
– ajayramesh, Commented Nov 11, 2017 at 22:19

ajayramesh · Accepted Answer · 2017-11-11 22:39:02Z

1

import cv2
import numpy as np
img = np.random.randint(222, size=(100, 100,3))
gen = np.array(img ,dtype=np.uint8)
cv2.imshow('i',gen)
cv2.waitKey(0)
cv2.destroyWindow('i')

answered Nov 11, 2017 at 22:39

ajayramesh

3,83510 gold badges58 silver badges82 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to create an image from a Matrix using opencv python?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related