thermal noise will cause pixels to be bright enough to seem like a hot pixel on a long enough exposure. dark field subtraction can remove only pixels that hot in the dark field. if the actual exposure has bright pixels different from the dark field, they will remain. Photoshop can detect these and filter them out. the camera could too.
Herb... ----- Original Message ----- From: "Rob Brigham" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, March 15, 2004 6:48 AM Subject: RE: *ist D Pixel Comparison Test > I must admit I am slightly puzzled - I thought the in-camera NR (dark frame subtraction) was supposed to get rid of ALL hot pixels by removing any hot pixels in the dark frame from the resultant picture, presumably interpolating a best guess of what should be there. So why do you get ANY hot pixels with NR on?
