For vector graphics, ImageMagick has both a render resolution and an output size that are independent of each other Try something like convert -density 300 image. Eps -resize 1024x1024 image. Jpg Which will render your eps at 300dpi.
If 300 * width > 1024, then it will be sharp. If you render it too high though, you waste a lot of memory drawing a really high-res graphic only to down sample it again. I don't currently know of a good way to render it at the "right" resolution in one IM command.
For vector graphics, ImageMagick has both a render resolution and an output size that are independent of each other. Try something like convert -density 300 image. Eps -resize 1024x1024 image.
Jpg Which will render your eps at 300dpi. If 300 * width > 1024, then it will be sharp. If you render it too high though, you waste a lot of memory drawing a really high-res graphic only to down sample it again.
I don't currently know of a good way to render it at the "right" resolution in one IM command.
Thanks, that did it, actually the best resolution result is when density=resize, e.g. : convert -density 1024x1024 -resize 1024x1024 test. Eps test. Jpg – Edward Tanguay Sep 28 at 14:41 No, I don't believe that does what you think it does.
It renders your image at 1024dpi, and then downsamples it to 1024x1024px. For example, a 4x4in EPS would become 4096x4096px in memory, and then resized to 1024x1024px. – erjiang Sep 28 at 15:59 When I was googling, I found this stackoverflow answer just after/below a different one that had the right answer and a key nugget.
It's key point was to make sure the -density flag (I used "-density 400%") appears before the input file name. In my original setup, I was sandwiching all the flags between the input file name and the output file name, and -density has no effect in that case (leading to a blurry text font image). So readers should make sure that -density appears before both test.
Eps and test.jpg. A common case for me was converting pdf to png. – Jose_X Oct 18 at 20:09.
Maybe you should try it with -quality 100 -size "1024x1024", because resize often gives results that are ugly to view.
Hmm, convert -colorspace RGB -flatten -quality 100 -size "1024x1024" test. Eps test. Jpg creates a .
Jpg with a size of 100x41, why would that be? – Edward Tanguay Sep 28 at 13:36 Have you tried it without the quotation marks? Otherwise I won't get, where the problem is – zcei Sep 28 at 13:45 Yes, I tried it without quotes with same result, a colleague mentioned that the "XMP information define the thumbnail as a smaller size", perhaps I need to override that somehow?
– Edward Tanguay Sep 28 at 13:50 I posted the XMP data above, strange that it states height=104, width=256 but it creates a test. Jpg with height=100, width=41. – Edward Tanguay Sep 28 at 13:56 the command convert -colorspace RGB -flatten -quality 100 -size "1024x1024" test.
Eps test. Png also produces a 100x41 image – Edward Tanguay Sep 28 at 13:58.
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