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You can't. You have already compressed it too much. If you really want to submit photos to contests you need to set the camera to Large, Fine to get the most pixels at minimum compression. Cards are cheap.
Hi all, I want to enter a photo in a contest. The file has to be JPEG or Jpg. They want it to be at least 5MB and 300 Dpi. I figured out how to change my Dpi but can't make the file bigger. My file is a little less than 2MB. As described above, they won't tk PNG which would be bigger. How to increase file size?
You could try to use a Photo Editing software application to increase the "canvas size", or page size, of the print. However, this will result in an apparent loss of resolution and detail, because the image has been expanded to larger than its' original, native size.
I find it strange that a contest would request a minimum size [5MB}, instead of a maximum file size. I, also, find it a bit unusual that a print size has not been specified, in addition to a DPI specification.
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