MATLAB: Reading an pdf image

imread

I have an pdf ,in which i have converted to image format,when i read into matlab using imread,the document is not clear as the original image ,plz tell why i get like this

my image

http://www.sendspace.com/file/ais74u

Best Answer

first of all its almost same after downloading the file you upload on link,your file is in png format,if you want to increase the quality u can create a jpg file first and then using quality command u can see the change in it. a = imread('pdf.jpg'); imwrite(a,'pdf.jpg'); imshow('pdf.jpg'); imfinfo('pdf.jpg'); imwrite(a,'pdf1.jpg','quality',100); figure, imshow('pdf1.jpg'); imfinfo('pdf1.jpg');

hope this will help you...

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Qualities = [0 5 15 25 50 75 90 100];
for qidx = 1 : length(Qualities)
    filename = sprintf('CompressedQuality%d.jpg', qidx);
    imwrite(Original, filename, 'jpg', 'Quality', Qualities(qidx));
    information = imfinfo(filename);
    CompressedFileSizes(qidx) = information.FileSize;
    CompressedRatios(qidx) = OriginalFIleSize / CompressedFileSizes(qidx);
end

Best Answer

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