People that say tiff is the most appropriate format for picture editing are not as right as they claim.
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. 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. These intermediary save will always be done under a format that is especially made for editing, that saves both quality and allows changes to become editable. If by instance you are using Photoshop to make changes, then save the intermediary files as psd, witch is the typical Adobe Photoshop format. Failing to do this will return an intermediary save that acts just like another image. And finally, when you think you are done, choose a final saving format for the image from the conventional ones.
Some people believe that if you crop in any way an image you will lose quality. Cropping means that you can rotate, enlarge, resize the picture using certain algorithms that are known by your editing program. It’s obvious that enlarging algorithms that will enlarge only by pulling pixels until they become visible are algorithms that decrease image quality. photo printing online