CHG_CANON wrote:
Why the focus on PNG? A PNG is just a JPEG with a lossless compression when the file is repeatedly edited and saved.
What is the original file capture format coming out of the camera? When the image file is edited, what tool is being used? The capability of this edit tool controls how easily you can be extracted from the background and then simply saved into any useful format for merging with a different background, while maintaining the most amount of original image data.
Possibly cos a PNG can be saved with a transparent background. A Jpeg will always show a white background with a cut out image