I have an Image shown below as 'a' ,after extracting co-ordinates of certain pixels , based on some specified criteria. when I am changing the colour of those coordinates in oriinal image I am getting different type of image.? ,

[Guillaume]

You have not provided enough information for us to help. We don't know:

• how you are importing the image into matlab
• what class you store it as
• how you are changing the colour of those coordinates
• what you mean by different type of image

Answer 1

[Image Analyst]

Looks like a classic beginner mistake of thinking (x,y) is the same as (row, column). Matrices take indexes as (row, column) NOT (x,y), which you probably used. (x,y) is really (column, row) which is not how arrays index their values. Instead try (y,x):

m(y, x) = .....

Answer 2

[Mohammad Bhat]

Sir, thank you