Creating an image using row number, column number, and corresponding Intensity?

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Raju Kumar 2022-7-5

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评论： Jon 2022-7-5

Hello Matlab experts,

I would like to create an image (pixel size 256x256) from a given data set which has three columns. Column 1 and 2 are basically different combination of row and column numbers (e.g. [r c] = [166 122], [166 123] etc.) and column 3 contains 'Intensity' corrposnding to each row number and column number. How do I create an image from such data given that there are 30000 data sets including repeatations?

Thanks a lot in advance for any leads.

Raju

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Answer 1

Jon 2022-7-5

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https://ww2.mathworks.cn/matlabcentral/answers/1753950-creating-an-image-using-row-number-column-number-and-corresponding-intensity#answer_1000720

编辑：Jon 2022-7-5

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Suppose you have your data as you describe in matrix A, then you could use:

B = zeros(256,256); % preallocate array to hold image
idx = sub2ind(size(B),A(:,1),A(:,2)); % get linear, columnwise indices
B(idx) = A(:,3); % assign corresponding intensity values to form image matrix