jpg vs png

[dvhirst]

Hello,

I know it is preferable to edit .tiff formatted image files; however, sometimes it becomes necessary to work with already compressed images. In the PWP universe, is there any advantage of one compressed format over another, e.g., .jpg vs .png? I tried to search on this set of terms, but the search algorithm says vs is too short and .jpg is too common, as is .jpeg. Is there any way to force a search of a particular term, say within a smaller set found in an initial search?

[jsachs]

JPEG has the advantage that is retains most or all of the image metadata while PNG saves only limited metadata. JPEG only supports 8-bit black and white and 24-bit color and its compression is not lossless while PNG can save 16-bit black and white and 48-bit color images and also supports an optional alpha (mask) layer. PNG compression is lossless.