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Digital camera how to reduce noise

Digital camera (also known as: Digital Camera English full name: Digital Camera referred to DC), is an electronic sensor to the optical image into electronic data camera. Digital cameras and camera on film by ordinary silver bromide to record images of chemical changes in the principle of different digital camera sensor is a light sensor in the CCD - (zh-cn: device; zh-tw: Component) - (CCD) or complementary metal oxide semiconductor (CMOS). In the image transmission to a computer before will usually stored in the digital storage device sd memory cards in the.
Digital camera is a optical, mechanical, electronic integrated products. It integrates image information conversion, storage and transmission components, with digital access mode, and computer interactive processing and real-time shooting and so on. Light through the lens or lens group into the camera, the imaging device into a digital signal, digital signal through the images stored in the memory chip computing devices. Digital camera is the CCD imaging device or CMOS, the imaging device is characterized by light through, according to the different light into electronic signals. Digital cameras first appeared in the United States, 20 years ago, the United States has used its transmission to the ground via satellite photos, and later converted to civilian use of digital photography and constantly expanding range of applications.
Shooting moving objects or shooting in the dark environment, sometimes with high sensitivity settings can be carried out, in times of high ISO values were taken, the shutter speed faster, take up relatively easy, but brings a high sensitivity problem is that screen noise will increase, in fact, many digital camera users Zheshi Rang dilemma headache, sensitivity is low, hard shot, low noise, high sensitivity, shooting easier, more noise. In general, lcd digital photo frame with high sensitivity photographs we have had to reduce the resolution to appreciate, but the noise then the picture is not as obvious, a simple analysis because the shrunken image on a pixel is from the original number of pixels obtained after the merger, in other words, the three noise into a noise, this is not a very strict interpretation, but you can help us understand this phenomenon. So use this phenomenon discussed above, we can be solved directly in the TreadTang digital camera noise high-sensitivity shooting more difficult. But before we come to know the causes of the digital camera noise: in the case of low light illumination, CCD unit can not sense enough light, in the light signal is converted to electrical signal intensity after the current is relatively small, while the CCD itself adopted relative increase in the proportion of dark current generated, it can be understood in order to increase the brightness of the CCD sensor to reduce noise. For instance, we put up to 3 million as the maximum pixel digital camera shooting at 100 million pixels, so that the equivalent of using three CCD light-sensitive cells when a use, representing an increase of 3 times the light-sensitive capabilities, image noise also decreased a lot. Film Camera Accessories at high sensitivity settings the number of pixels in accordance with the best shot, which requires users to their own experiences, we make a comparison, if all the ISO400 setting, it may be two million pixel digital camera in 640 × 480 taken under the resolution setting the minimum noise, while the 5 million-pixel digital camera in 1024 × 768 resolution settings can get very good results.