i did as u guys said but this error pops up im sorry for asking alot but i really need help

Answer 1

[Image Analyst]

This is a perfect example of how using short, single letter variable names instead of longer more descriptive filenames can lead to unintended errors. If it had code like this:

rgbImage = imread(fullFileName);

then later on you would realize

rgbImage = imread(rgbImage); % Bad!

would not be correct since you would realize that imread() wants a string (filename), not a uint8 image array, as an input.