• Source: Hot pixel (telescopes)

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, 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.
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.




See also


Defective pixel




References

Kata Kunci Pencarian:

• Hot pixel (telescopes)
• Spitzer Space Telescope
• Pixel
• Palomar Observatory
• Hubble Space Telescope
• Swiss 1.2-metre Leonhard Euler Telescope
• VISTA (telescope)
• Wide Field and Planetary Camera 2
• Advanced Telescope for High Energy Astrophysics
• Charge-coupled device