How to Convert RGB imgage to NIR+RGB image?

Question

Is it possible to convert RGB image to RGB+NIR image?

Does this help? https://stackoverflow.com/a/58900493/2681662 — MSH, Oct 30 '21 at 19:00
Please provide enough code so others can better understand or reproduce the problem. — Community, Oct 31 '21 at 03:44

Mark Setchell · Answer 1 · 2021-10-30T20:31:19.517

1

You can use OpenCV like this:

import cv2

fourChannel = cv2.cvtColor(threeChannel, cv2.COLOR_RGB2RGBA)

Or you can use Numpy to make a new, empty channel of same size and type as your original, and stack it onto your 3 channel image:

import numpy as np

newEmpty = np.zeros_like(threeChannel[...,0])
fourChannel = np.dstack((threeChannel, newEmpty))

edited Oct 30 '21 at 20:31

answered Oct 30 '21 at 19:03

Mark Setchell

The Second Method you shared worked for me, At least my code is accepting the images i converted from 3 channel to 4 channel. can you explain what is the 4th channel in your method, Is it all zeros? – Muhammad Salman Nov 01 '21 at 09:36
Yes ,the fourth channel is all zeroes. You can add 255 to it if you want to fill it with that value. – Mark Setchell Nov 01 '21 at 10:38
if i want to fill the new channel with any other value in float or double the ho can i do that? – Muhammad Salman Nov 01 '21 at 16:41
You can use `fourChannel[..., 3] = 127` to fill the new channel with the value 127. – Mark Setchell Nov 01 '21 at 17:28

1 Answers1