1. Avoid older PDF-creation software. PDF-creation software prior to about 2008 contained a serious bug. The files would rasterize (convert from PDF to a form usable by other software) fine when creating small files, but would drop characters and parts of characters when creating large files suitable for large prints. 2. If you’ve cropped your…
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Everything would be simpler if all image files used the same color space. (0,0,0) would be black. (The first number is red. The second number is green, and the third number is blue. The numbers range from 0 to 255.) (255,0,0) is red, (0,255,0) is green, (0,0,255) is blue, (255,255,255) is white, and (128,128,128) is…
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Older monitors and video driver boards varied considerably from unit to unit. As a result, monitor calibration programs were devised to attempt to reduce the errors. New equipment is considerably more accurate. A new monitor and a new computer, operated at nominal (“out of the box” — including intensity at nominal, not maximum) settings, is…
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Megapixels. The number, in millions, of pixels (picture elements) in your file. For large prints, 3 is poor, 6 is OK, 10-12 is very good, 15 and up is the best. PPI. Pixels per inch. Each file contains a more or less arbitrary number, the pixels per inch, used to convert from pixels to inches. For example,…
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