Hot pixel (telescopes)
(Redirected from Warm pixels)
 | This article relies largely or entirely on a single source. (March 2023) |
A hot pixel or bright dot defect is a pixel that outputs many more electrons than others at the same input signal in a charge-coupled device (CCD) or CMOS sensor. In the simulated image,[1] the hot pixels are the sources of the salt-and-pepper noise. In the definition of the HST ACS, A pixel above 0.14 e¯/pixel/second is considered a "hot" pixel.[2]
A warm pixel is a pixel that has negative bias values. In the definition of the Hubble Space Telescope, a pixel below the hot pixels range but above 0.06 e¯/pixel/second is considered a "warm" pixel. [2]
See also
[edit]References
[edit]- ^ Hroch, Filip (2000-02-23). "The robust detection of stars on CCD images". Experimental Astronomy. 9 (4): 251–259. arXiv:astro-ph/0002435. doi:10.1023/A:1008195518637. S2CID 13504731.
- ^ a b "4.3 Dark Current, Hot Pixels, and Cosmic Rays - HST User Documentation". hst-docs.stsci.edu. Retrieved 2023-03-09.