Graphics export to BMP and JPEG
- To: mathgroup at smc.vnet.net
- Subject: [mg82631] Graphics export to BMP and JPEG
- From: Hannes Kessler <HannesKessler at hushmail.com>
- Date: Fri, 26 Oct 2007 05:30:08 -0400 (EDT)
Hello all, what options are recommended for Export["image.bmp",_Graphics,ImageSize->..,ImageResolution->..], also for image.jpg, image.tiff in order to get image files of the same quality as right mouse clicking the image in the notebook and copying as a bitmap or metafile? I tried different values of ImageSize- >..,ImageResolution->.. but with quite poor results. The _Graphics were ordinary plots created by Plot or ListPlot. For example, Export["image.bmp",_Graphics,ImageSize- >Large,ImageResolution->72 n] with n=1,2,3,... did not improve the image quality with increasing n. I checked with Irfan view that with increasing ImageResolution the default print size of the image decreased proportionally. In other words, the image resolution at constant image size remained always constant (and poor). Increasing ImageSize at constant ImageResolution increased proportionally both the default print size and the number of pixels as one would expect. But artificially exporting the graphics with large ImageSize and then sizing down does not help as the text size remains constant during the export even when ImageSize increases and thus sizing down subsequently would make the text invisible. As a side question, what are the default sizes for ImageSize->Large, Medium or Small in different situations? Are they documented somewhere? Thanks in advance, Hannes Kessler