Of course the image from a Pentax DSLR is INTERPOLATED because there are only 1/4 as many color capture sites ( 4 pixels each ) as there are color pixels in the final image after processing. Thus there is essentially a 4 to to 1 interpolation going on because four monochrome only pixels are used create 4 full color pixels in the final image output. jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Lacus Sent: Saturday, January 20, 2007 2:26 AM To: Pentax-Discuss Mail List Subject: Re: K10D: Discovered Hot Pixel on my New Camera Godfrey, >>>If you capture in RAW format and use Camera Raw or any of the other, >>>better RAW conversion applications out there, hot pixels will >>>automatically be removed. >> >>true. Or perhaps better said they will be interpolated (just like any >>other pixel in the resulting image. ;-)) > > > More precisely stated, hot pixel values are replaced with high- > probability, nearest-neighbor values to smooth the rendering. Not if this is not a definition of the interpolation then I don't know what it may be. > exactly "interpolated", per se. 'Hot pixel removal' is jargon for > this process. > I think otherwise you are oversimplifying what bayer demosaicing and > gamma correction are if you say that all pixels in the resulting > image are 'interpolated'. The values are certainly derived in many > ways, but the interpolation process isn't what most people tend to > think of as interpolation from high school trigonometry. "A demosaicing algorithm is a digital image process used to interpolate a complete image from the partial raw data received from the color-filtered image sensor internal to many digital cameras in form of a matrix of colored pixels." Source: http://en.wikipedia.org/wiki/Demosaicing By no means I'm saying that Wikipedia is a definitive source of knowledge, but it looks that at least some people share my opinion. Cheers, Peter -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
