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.? ,

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Mohammad Bhat 2017-11-22

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回答： Mohammad Bhat 2017-11-22

采纳的回答： Image Analyst

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Guillaume 2017-11-22

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

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Answer 1

Image Analyst 2017-11-22

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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) = .....