Understanding Camera Sensor
Unlike what we understand a pixel to be when we look at an image, the “pixels” on a sensor has a red, green or blue filter on top of it, allowing only the light that passes through these filters to be registered. These filtered pixels are laid out in alternate patterns, with green pixels being two times that of the red and blue pixels in any given horizontal or vertical line. The adjacent red green and blue pixels are combined into a single RGB pixel using a process called ‘demosaicing.’ The binning process takes place during the demosaicing stage, even before the JPG is generated.
What is Pixel Binning?
Pixel Binning is a image signalling processor based technique.It takes place at the time of demosaicing process where it combines information from four pixels into one.For example that a pixel binning take 2x2 grid and combines them into one.The information captured by each individual pixel is now combined into one Super Pixel.The unfortunate result of that is the resolution of the resulting image is 1/4th resolution of the sensor.The combination of data collected by 4 adjacent pixels into one “super pixel” is called pixel binning
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