Problem with imwrite a color image
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I am trying to save the output color image of a program as a jpg or png file. I have tried
outfile='image.jpg'
imwrite(im2uint16(Image),outfile,'BitDepth',12,'Mode','lossless','Quality',100)
When i tried to open this using Gimp or ImageMagick , the image could not open, it was not recognized. Can anyone suggest the right way to save a color image as a jpg using imwrite? Thank you.
4 件のコメント
採用された回答
Image Analyst
2018 年 8 月 14 日
Photoshop doesn't recognize it either. But this works:
rgbImage = imread('peppers.png');
outfile='image.jp2' % JPEG 2000
imwrite(im2uint16(rgbImage),outfile,'Mode','lossless')
And I'd recommend you use PNG rather than JPG or JPEG2000 (jp2).
PNG has pretty much become the widespread de facto standard.
8 件のコメント
Walter Roberson
2018 年 8 月 15 日
編集済み: Walter Roberson
2018 年 8 月 15 日
writejpg>set_jpeg_props would never be called for file extension .png .
If you go the dual-file route, then
imwrite(im2uint16(rgbImage), 'newimage.png'); %for archive quality
imwrite(im2uint8(rgbImage), 'newimage.jpg'); %for quick access that is not archive quality
その他の回答 (1 件)
Walter Roberson
2018 年 8 月 14 日
JPEG does not support 16 bit images. Some JPEG libraries support 12 bit images.
JPEG XR supports 16 bit images, but MATLAB does not support JPEG XR.
8 件のコメント
Walter Roberson
2018 年 8 月 16 日
.. So write two copies of the image like I suggested, one archive quality and the other reduced bit depth for speed.
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