The best image format for raster graphics is png, which compress better than gif and have other technical advantages. For example, this can include screenshots, pixel art, and interface mockups. Raster graphics are digitally created, and are pixel-based. Do not make some edits, save, make more edits, and save again because this means the quality has been reduced twice. If you are using a photograph in a publication, then always apply all your changes to the original file once, and then save it into the final file. This is because jpeg images are lossy, which means they are approximated with equations rather than having every pixel described in the file. A low quality jpeg is easy to notice because it has compression artifacts that look like tiny worms near the sharp contrasts in the image. Often even opening them and saving them elsewhere will degrade its quality. Cropping them, editing them even a bit, or compressing them down are all actions that reduce their quality. A photograph can never be made higher quailty, but any change to them makes it lower quality. Every time they are saved, they degrade in quality. Photographs are typically represented as jpeg files. One type should never be converted to another type, as they are best stored in their native format. There are photographs and digital graphics within digital graphics, there are pixel-based (raster) graphics and vector graphics. There are three different image types, and each one needs a different treatment. I've tried to write about the typical scenarios, but there are obviously some exceptions. I hope these notes can lead to fewer charts with compression artifacts, vector graphics that have sadly been saved as pixels, and 10 megabyte pdf files.
#Leading kerning in microsoft word 2010 how to#
I searched online but only found shallow articles describing the many file types, and not a guide for how to use them. There's a bit of an art for including images in publication materials so they look their best. Some tips for publishing better-looking papers
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