how to convert output to integer?

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fahim GH
fahim GH 2015-10-4
评论： Walter Roberson 2015-10-4
hi i wrote the following code for converting image to textfile but the arrays of output are hexadecimal in the textfile.how could I convert them to integer??? tnx
a= imread('D:\IP1\12.jpg');
I=rgb2gray(a);
b = I(:);
fid = fopen('D:\IP1\in2.txt');
fprintf(fid, '%x\n', b);
fclose(fid)

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回答（1 个）

Stephen23
Stephen23 2015-10-4
编辑：Stephen23 2015-10-4
The output values are hexadecimal because that is exactly what you are telling fprintf to write:
fprintf(fid, '%x\n', b);
where the format specifier '%x' exactly means hexademical. If you want another number format, then you need to read the fprintf documentation and pick a format specifier that suits your needs: there are many options, so it is worth reading the documentation carefully. You might like to start with %d:
fprintf(fid, '%d\n', b);
More details here:
http://www.mathworks.com/help/matlab/matlab_prog/formatting-strings.html

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