CODEWITHSUNDEEP
pythonopencvimage-processing
John Bott
John Bott

Reputation: 385

How to convert (1024,1024) shape image to (1024,1024,3) in OpenCV

I have a single channel image with shape (1024,1024).

I want to overlay it with a color image of shape (1024,1024,3) using dst = cv2.addWeighted(im, 1, newimg, 1, 0)

So First, I want to know, how can I convert newimg to 1024x1024x3...Because im is of shape 1024x1024x3

Upvotes: 0

Views: 1458

Answers (2)

sourab maity
sourab maity

Reputation: 1045

mask = cv2.inRange(frame, lower_blue, upper_blue)
print(mask.shape)
mask2 = cv2.cvtColor(mask, cv2.COLOR_GRAY2BGR)
print(mask2.shape)

Output:
(480, 640)
(480, 640, 3)

This converts image into 3 channel.

Upvotes: 0

fmw42
fmw42

Reputation: 53089

This seems to be one simple solution using numpy. 

Create a 3-channel black image

Put your same grayscale image into each channel



newimage = np.zeros((grayimage.shape[0],grayimage.shape[1],3))
newimage[:,:,0] = grayimage
newimage[:,:,1] = grayimage
newimage[:,:,2] = grayimage

See how to copy numpy array value into higher dimensions

Upvotes: 3

Related Questions