Would any of you image processing experts that are familiar with the inner workings of jpeg comment on the effects of smaller jpeg files regarding image noise reduction? If one has a larger raw file and selects a smaller jpeg file size in LR4, does this have the same or similar effect as pixel downsampling the image from a noise prespective?
#3. "RE: Image Processing" In response to Reply # 2 Wed 06-Feb-13 09:36 PM by mawyatt1
The noise reduction I was referring too is a consequence of the down sampling of the image. Another described this very well as: If the downsampling image is taken to just one pixel, then the noise is eliminated.
In terms that I work with which is electronics and communications, this is effectively equivalent to bandwidth reduction which improves the resulant signal to noise ratio. Narrow band information systems are inherantly more sensitive then wideband information systems.
I was concerned about whether the reduction took place before or after the JPEG compression. Apparantly LR does the reduction then the compression, which is the right sequence.