how to increase a pixel value

I have an M X N image named H. How can I increase the value of a particular pixel? Please help

Answer 1

[Algorithms Analyst]

you need to find the location of that pixel and then need some operations. like

[Rows Cols NumberofColorChannels]=size(H) for i=1:Rows for j=1:Cols

%Now find the location e.g you want to change the vale at 3 row and 3col initially its 2 then u can

if i==3 && j==3 do it further

[Vishnu M S]

How can I increase the pixel value at a particular location?(say, I need to find the pixel at 5th row and 7th column and I need to increase that pixel value.)

[Walter Roberson]

H(5,7) = H(5,7) + 1;   %for example