Photography Ri
Is changing Digital Photos Images Safe for Image Quality?
Some say that after you have your high quality, high resolution pictures and you want to put them on your hard drive and work on them for a little bit, it’s best to transform first the Jpeg files that come from you camera to tiff or other appropriate format, because working on jpegs might cause you to loose quality and color.
In fact, when you first got your pictures from the camera, transforming them is never the first step. The image is stoked onto your hard drive in a compressed format, named JPG. The image that is read by the virtual memory is uncompressed. Format issues can only arise after editing what you want and saving the final image. If the editing programs remains open, and you make a tiff save, the computer will use tiff compression methods to save a copy on the hard drive, but the original uncompressed image in still unchanged. What you have in the computer memory is not affected by a save during editing, as long as you use a different name for the new file.
The main idea is that you should make intermediary saves while you work, so you can get a sort of restore point, from witch you can continue work in case something goes wrong. But when making these saves, be sure you make them under a digital photography format that does not only allow you to keep the image quality but can also save the image layers you might be working on. So this basically means you should save the intermediary images in the format that is specific to your photo editing software. If you do this, when you mess up your work and return to the saved point, you will be able to follow all the previously taken steps. Only when you are done editing you can same the image in a conventional format like JPG for online photo sharing, TIFF for images that are meant to be printed at high resolutions and so on.
Another myth that is not true is the one that states cropping a digital photography image can modify its pixels. Rotating and resizing the image will produce the generation of a new image, based on the old one, and the result will be better or worse depending on the algorithm used. There are shrinking algorithms that eliminate extra pixels, and enlarging ones that make the pixel dots bigger. snapfish
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