Is changing Digital Photography Images Safe for Image Quality?
People are usually afraid of working of plain Jpeg on their PCs after they collect them in that format from their digital photography apparatus, and are inclined in directly transforming them to tiff.
If you want to edit your pictures, the truth is there are many more stages you have to go though before editing the format. The images downloaded from the camera might be a compressed JPG that will be stored on the hard drive. But in the working memory, it becomes an uncompressed bitmap each time you open it and start working on it. Format issues can only arise after editing what you want and saving the final image. Compressing during a save does not affect the quality of the initial uncompressed image with the changes it now has that is still located in the virtual memory and will remain there until you close the editing program. The only quality changes are visible in the saved JPG, with because of the compression it’s normal to have less information.
It’s normal to make intermediary saves when changing a photo’s appearance because you never know what could go 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. If by instance you are using Photoshop to make changes, then save the intermediary files as psd, witch is the typical Adobe Photoshop format. 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. Some algorithms eliminate extra unnecessary pixels, and others will simply enlarge existing pixels. snapfish
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