What happens to a jpg image when I export it as a TIFF?
I've just learned that for a few years, my iPhone has taken photos as HEIC files. However, I have lots of older JPG photos. Let's say I select a JPG image from my Photos library and export it to a folder in Finder as a TIFF, then import the shiny new TIFF back into my Photos library. "Info" for the original image in my library says its 3.4 MB (2400 x 1920). In Finder, I see the exported TIFF version is now 13.8 MB (2400 x 1920).
My questions—
- If a JPG has lost data from compression, from where does the converter recover the lost data to rebuild the image as a TIFF? In a manner of speaking, where does the converter collect all that missing pixel dust?
- The file size as TIFF is much greater, but the number of pixels remains the same. What's the advantage of TIFF over JPG if the pixel count doesn't change?
I ask because I'm about to start a new Motiv project. Motiv seems to prefer TIFF or PNG file formats over JPGs because those more robust formats yield a better quality project. Can I expect better results if I convert selected JPGs to TIFF or PNG and use those images instead of the original JPGs?
MacBook Pro 13", macOS 10.15
