How to create an image by replacing each pixel with mean RGB value.

I need to create an image by replacing each pixel with the mean value of its RGB components.

Answer 1

[Ameer Hamza]

Specify the dimension to the mean function. It will create a grayscale image

img = im2double(imread('peacock.jpg'));
img_mean = mean(img, 3);
 
fig = figure();
subplot(1, 2, 1);
imshow(img);
subplot(1, 2, 2);
imshow(img_mean);

[Stefan Tabakovski]

Thank you! Would you by any chance know how to do these others?

(done)use the mean (average) of each color component (RGB) of the respective pixel for the value of each pixel;

for the value of each pixel, use the mean power of each color component (RGB) of the pixel in question;

use the variance of each color component (RGB) of the respective pixel for the value of each pixel.

[Ameer Hamza]

You can calculate these other images using their formula. For example

img = im2double(imread('peacock.jpg'));
img_mean = mean(img, 3);
img_power = rms(img, 3);
img_var = var(img, 1, 3);

fig = figure();
subplot(2, 2, 1);
imshow(img);
subplot(2, 2, 2);
imshow(img_mean);
subplot(2, 2, 3);
imshow(img_power);
subplot(2, 2, 4);
imshow(img_var);

[Stefan Tabakovski]

Perfect! Thank you!