Bill Tuthill wrote:
In rec.photo.digital harrogate3 wrote:

JPEG is a lossy form of saving the picture -

The Bayer sensor is already lossy, having only one of RGGB at
any of four pixel locations, so one could make the argument that
JPEG imposes no further loss.

However, JPEG imposes an additional loss, because of the approximations it
makes. You can control the degree of approximation by the quality setting
on cameras, or by the compression or quality settings in your software.

David