Resize Image
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Could anyone suggest the best way of resizing an image (.bmp/jpeg) without loss of quality. The problem we are facing is that when we tried resizing one of our images (3000X3000 pixels) to 75X75, it looks fine, and also comes out well when printed directly or as image in a word document, but when the same word document is printed as a pdf, the edges are all jagged and the quality is quite rubbish. Any suggestions? Thanks
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Could anyone suggest the best way of resizing an image (.bmp/jpeg) without loss of quality. The problem we are facing is that when we tried resizing one of our images (3000X3000 pixels) to 75X75, it looks fine, and also comes out well when printed directly or as image in a word document, but when the same word document is printed as a pdf, the edges are all jagged and the quality is quite rubbish. Any suggestions? Thanks
when downsizing from 3000*3000 to 75*75 pixels, you are throwing away almost all available information; the net result is the output image may look fine when taken as is (assuming a good downsizing algorithm was used), but it will not support any image processing, such as another rescale (to e.g. 70*70 pixels), no matter how good the algorithm is: the information isn't there any more. I suggest you downsize it no further than 300*300, or whatever your experiments will tell you is still acceptable. :)
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Could anyone suggest the best way of resizing an image (.bmp/jpeg) without loss of quality. The problem we are facing is that when we tried resizing one of our images (3000X3000 pixels) to 75X75, it looks fine, and also comes out well when printed directly or as image in a word document, but when the same word document is printed as a pdf, the edges are all jagged and the quality is quite rubbish. Any suggestions? Thanks
Archimedes24 wrote:
but when the same word document is printed as a pdf, the edges are all jagged and the quality is quite rubbish.
what are you using as the PDF output? are you using the save-as within word for pdf? or adobe pdf printer? or other free pdf printer? You may just need to change the default properties of your PDF output to increase the quality of the images. This is quite common to do when storing image graphs which do not convert to JPG low quality without significant loss of data.
Archimedes24 wrote:
when we tried resizing one of our images (3000X3000 pixels) to 75X75, it looks fine, and also comes out well when printed directly or as image in a word document
that sounds like you managed a decent shrink if the image is viewable well without saving to a PDF. I would focus on the PDF settings if the image looks okay after shrinking and used within a print or display. I assume you are referring to using the shrunken image within these two (word and printing) and not the original image. If the problem is really the shrinking, you can choose a bicubic resize and drop in no more than 1/3rd or 1/2 resolution at a time. A good algorithm will take into account blending multiple pixels into one, but a bad algorithm may need to drop half resolution again and again until you reach your goal. Theoretically you will arrive at the same result, but depending on implementation you might not. http://www.imagemagick.org/script/convert.php[^] Adaptive resize is generally good, though from your description I think the problem is not the resize, but the PDF output.
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