EXR adopts "pixel pair" technology to achieve ultra-high sensitivity and ultra-low noise.
In the past, the method of enhancing the gain of a unit pixel to obtain high sensitivity will lead to a large increase in noise, while the usual noise reduction method will even lead to the generation of image blur (loss of picture sharpness) and the decline of resolution. At present, another method to achieve high sensitivity is to obtain low-noise image signals through pixel merging technology. However, the traditional pixel merging method (merging along the horizontal or vertical direction) will lead to the generation of wrong colors because of dealing with the spacing between pixels of the same color, and the result of suppressing this phenomenon is a sharp decline in image clarity.
EXR changed the color filter array. In this way, two adjacent pixels with the same color will be perfectly merged and work as one pixel. Under this design, the capture of image information (optical signal) is doubled, the sensitivity is doubled, and the "dark noise" is extremely small. Therefore, ultra-high sensitivity and ultra-low noise can be achieved at the same time, replacing the previous method of increasing noise by increasing gain.