Today I checked the file sizes for the images in my children’s book. Last month I learned that InDesign could process my PSD files directly and I started replacing the JPEG and PNG images with the original PSD files, one at a time. Just to make sure I’d replaced all of the low-res files, I saved the book as an InDesign package, which places a copy of all the files in use into a project folder. Today I looked at the “links”, as InDesign calls packaged images, and found that I had not replaced many JPEG and PNG files. Some of the images were large enough and had sufficiently high resolution to work with a print book, but others had a suspiciously small file size. When I checked those funky files I found that they were 1000x1000 pixels, which would fail to pass the Ingramspark minimum resolution requirement. I’ll have to replace those files with the original PSD files. I’ll have to search for them. I know that some of the missing files exist only on my iPad.
Here’s an example of what I’m seeing. Notice the pixel size of 1000x996.