Maximising Pixels within Certain area of Matrix

Hi Everyone,

I'd like to loop through a matrix (128x128) and find the area (Lets say 5x5 Pixels) with the highest pixel values.

What is the best way to do this?

Thanks!

[Guillaume]

What is the definition of an area with the highest pixel values? One whose sum of pixel values is the greatest? One whose maximum is the greatest? Something else?

[Harry Andrews]

One whose sum of pixel values is the greatest please :)

Thank you for helping!

Answer 1

[Guillaume]

One whose sum of pixel values is the greatest

Convolve your matrix with an array of 1 the same size as the area. The location of the maximum of the convolution is the centre of the area with the highest sum:

areasum = conv2(yourmatrix, ones(5)), 'same');
[~, idx] = max(areasum);
[centrerow, centrecol] = ind2sub(size(yourmatrix), idx)

[Harry Andrews]

This is perfect, thank you <3