What does CCD of digital camera mean?

The heart of digital camera-CCD is a very mysterious accessory. In addition to representing resolution, CCD can also determine the quality and color expression of photos. Good CCD can greatly improve the shooting effect, but the cost is higher? On the contrary, poor quality CCD will cause irreparable damage to photos. The price of CCD is still hovering at a high level. People with discerning eyes will find that the CCD used by many brands of digital cameras is very similar in size, specifications, effective pixels and shooting performance, because manufacturers have no choice but to use the same CCD, such as NikonCOOLIPX5000, MinoltaDiMAGE7 and SonyCyber-shotF707. However, the new technology of X3CCD announced by Foveon may bring a revolutionary breakthrough to the development of CCD. General working principle of CCD At present, almost all CCDs capture one primary color (red, blue and green) from each pixel, so almost all the three primary colors will be converted into images by analog signals. Because the colors between pixels need to be balanced and complementary? Therefore, the images shot by traditional CCD often appear blurred and color distortion after amplification. The working principle of X3CCD In view of the defects of traditional CCD in capturing color, FoveonX3 technology aims at this problem, and transforms the color sensitive material of each pixel, adding three color sensitive layers on each pixel at the same time, so that each pixel of X3CCD can capture three primary colors of red, blue and green at the same time. Using this design, we can easily solve the problems of image merging caused by capturing only one color in the past, including lack of clarity, ghost and so on. Compared with shooting quality, when shooting, different lights will pass through different materials (the transmittance of silicon crystal is very high) and will be recorded when they reach the appropriate color sensitive layer. So theoretically, X3CCD can record more image and color data than traditional CCD in the same range, which greatly improves the level, clarity and details of the image. Because the green light in the spectrum can improve the clarity and contrast of photos? X3CCD can absorb more green light at a time than traditional CCD, so the photos taken by X3CCD will be clearer than traditional CCD at the same level. At the same time, because X3CCD technology can capture more color data at a time, the color reproduction effect of the object is remarkable, and the average color density is 25% to 50% higher than that of ordinary CCD, which makes the photos taken by X3CCD more colorful. In addition, due to the change of color recording arrangement of CCD, X3CCD has remarkable anti-net ability when shooting images previously called moire stripes, such as clothes, and will not appear the situation of net collision and ghosting like traditional CCD. . X3CCD also has built-in VPS technology (all written as VariablePixelSize). What is VPS? Simply put, you can respond to sympathy? Reorganize the pixels so that four pixels become an independent pixel, or 16 pixels become an independent pixel. Although this technology will greatly reduce the original resolution of CCD, for example, after a 3-megapixel CCD is reorganized, it will become only 640x480, but this technology is very useful for shooting dynamic images. Because the area of CCD pixels is relatively large, in theory, pixels can sense more light, improve the resolution of film, and make digital cameras shoot still movies better.