how to create image from text file data.?

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Lalit Patil 2012-11-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/54453-how-to-create-image-from-text-file-data

采纳的回答： Image Analyst

http://speedy.sh/yCYux/patil142.txt

This is the text file i have generated.. I want to create image from it.. It will be binary image..

clc;

clear;

fileID = fopen('patil142.txt');

C = textscan(fileID, '%f32 %f32');

fclose(fileID);

x=cell2mat(C(:,1));

y=cell2mat(C(:,2));

x=x';

y=y';

I am able to read it only but don't know how to create image..?

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Walter Roberson 2012-11-22

The text file you linked to has x running 1 to 480, but y in the range 333 to 340, and has no 0's in it. If you are hitting 0 then either there is a problem in the reading or you are reading different data than you linked to.

Lalit Patil 2012-11-22

http://speedy.sh/cdEqJ/patil113.txt

sorry, i forget to upload new text file that contains 0's at somewhere..

scatter(x,y) shows plot and i want image. and the second column contains pixel intensities, so, 0 means nothing will be showed in image..

only positive integer values will be shown in image..

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采纳的回答

Image Analyst 2012-11-22

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/54453-how-to-create-image-from-text-file-data#answer_66155

在 MATLAB Online 中打开

Try this:

maxRows = max(y);
maxCols = max(x);
binaryImage = false(maxRows, maxCols);
for k = 1 : length(x)
  row = int32(y);
  col = int32(x);
  binaryImage(row, col) = true;
end