I have a project concerning a grayscale picture

here's the question about the attached picture:

''Consider the image below. Discuss thoroughly what is wrong with this image. Then make some plans to address these mistakes/problems''

Answer 1

[Walter Roberson]

The answer is that the mistake was in creating a JPEG lossy image. JPEG effectively does a kind of anti-aliasing that makes image analysis difficult. The cure is to go back and re-take the picture using a lossless image format.

[Tiisetso]

Thank you But the plans to address the problem have to be in Matlab language

[Walter Roberson]

Here then:

filename = 'twoguys.jpg';

[~,~,ext] = fileparts(filename);

if ismember(lower(ext), {'jpg', 'jpeg'})
  error('Go back and retake the picture using a lossless compression like TIFF or RAW');
end

Answer 2

[CS Researcher]

The image has the salt and pepper noise. You can remove it using medfilt2 (Image Processing Toolbox)