Sony introduced two CMOS image sensors. The new stacked CMOS image sensors feature RGBW Coding and High Dynamic Range (HDR) Movie functions. RGBW Coding function enables images to be captured with low noise and high picture quality even in low-light conditions. HDR Movie function enables brilliant color to be captured across a broad dynamic range of low-light to bright-light conditions. In addition, Sony has also developed a model with built-in signal processing functionality, an element that usually requires external embedment.
The three newly developed next-generation back-illuminated CMOS image sensors feature higher image quality and superior functionality in a more compact size. Samples will begin to successively ship starting March 2012. The Sony stacked CMOS image sensors are ideal for use in smartphones and other devices.
The built-in RGBW Coding function adds W (White) pixels to the conventional range of RGB (Red-Green-Blue) pixels. This results in higher sensitivity, and enables high-quality shooting with low noise even in dark indoor or night settings. Sony’s device technology and signal processing realizes superior sensitivity without hurting image quality. In addition, while the individual pixels of the newly developed models are extremely minute at 1.12um, the incorporation of the RBGW Coding function has realized a SN ratio (signal-to-noise ratio) equivalent to that of a unit pixel size of 1.4um under conventional methods, which in turn has enables the image sensors to achieve a higher resolution at a more compact size. The new models are also able to output signals through the conventional RGB method, thus there is no need to change the signal processing adopted in existing devices.
High Dynamic Range Movie
The built-in HDR Movie function enables brilliant colors to be captured even in settings with a wide range of light including bright light. When shooting with differing light levels, such as an indoor setting against a bright outdoor background, there can easily be blocked up shadows for dark areas or blown out highlights for bright areas. Such phenomena are a result of the combination of low-light and bright-light, which have different optimal exposure conditions in the same shot. This function reduces this by setting two different exposure conditions within a single screen shooting and conducts the appropriate signal processing for the captured image information under each optimal exposure condition. This process generates an image with a broad dynamic range and enables shooting of both the background and subject matter with brilliant colors even in a bright environment.
More info: Sony Corporation