This is one (of many) places where raw files are very useful. The reason the 'hot pixel' appears to have a fringe, and be more than one pixel, is due to the Bayer interpolation. If the masking is done to a raw file before you do the interpolate and icc profile match etc, or better yet have an adaptive interpolator that can reject that pixel, then the results can be a lot better.
Of course this requires software that can actually do that in the first place... Love, Light and Peace, - Peter Loveday Director of Development, eyeon Software ----- Original Message ----- From: "Rob Studdert" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, October 07, 2003 11:12 PM Subject: Re: *ist D > On 7 Oct 2003 at 9:29, Lon Williamson wrote: > > > If the location of the pixels is constant, the color they > > take on is a non-issue, even if the color varies. > > You could develop a mask specific to your sensor and whack > > them out using a median filter of some suitable radius. > > And you could set it up as a batch action. > > Much faster than manual touch-up. > > If it were that simple I would have done it. Intensity varies with exposure > plus the hot pixels also develop a colour fringe which changes colour based on > the colour of the adjacent pixels. This means that unless carefully spotted > they will be visible, especially on a 4MP sensor like mine. > > See the following crop from a EI 320 1/2 second exposure (EXIF info intact): > > http://members.ozemail.com.au/~geroc/P9095721.jpg > > Not a perfect example as it's none too sharp however you get the idea. > > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] > http://members.ozemail.com.au/~distudio/publications/ > Pentax user since 1986, PDMLer since 1998 > >
