Per the submission guidelines, submitted images must be generated with lossless compression, and the image file format must be non-proprietary. Keep in mind that with the submitted images judges will be viewing them on their own computers. By non-proprietary, we mean a file format that is commonly used and accessible to the public (i.e., the judges will have no issues viewing them on a typical computer and do not have to purchase any proprietary software). Adobe is a software that is available to the public and commonly used, and assuming the submitted images meet all of the competition requirements (including being lossless), TIFF would be an acceptable file format.
