Dynamic Range (Dynamic Range).

The dynamic range of the sensor dynamic range that included the image from the "darkest" to the "brightest" of the range. .Larger dynamic range, can say the level of the more abundant, contained in the more wide color space. .As shown below: the greater the dynamic range of the camera, it can also record the shadow detail and highlight the details of the more abundant. .Note to reader, dynamic range and tonal range (ton <P> sensor dynamic range </ P> <P> dynamic range that included the image from the "most secret" to "the brightest" of the range. Dynamic range greater .beyond the level that the richer the color space is also included in the more widely. as shown below: </ P> <P align=center> </ P> <P> greater dynamic range of the camera, it can also record .The shadow detail and highlight detail richer. Please readers, dynamic range and tonal range (tonal range) is different. </ P> <P> dynamic range images </ P> <P> when we use JPEG format .picture, the camera image processor will be a strong difference between light and dark image information recorded tone curve. In this process, often eliminating the need for the processor as part of RAW data, the shadow detail and highlight detail. RAW format to maintain the digital image .sensor's dynamic range, and allows the user to a suitable dynamic range and tone curve compression tonal range, so that output to display or print the photos came out, appropriate dynamic range for viewing. in the tonal range of topics, we introduce .an extreme example. From this example we can see in the 32-bit floating point images, large dynamic range and tonal range is to be compressed. </ P> <P> pixel size and dynamic range </ P .> <P> see this place, I believe that readers should be clear: the digital camera sensor is composed of hundreds of millions of pixels, these pixels in the sensors absorb photons during the exposure, converted into digital signals, and imaging. .This process took millions as we go outside to collect rainwater buckets. more light sensitive area, the amount of photons collected more natural. the sensor to light, each pixel sensor in accordance with the different amount of collected photons, given they are not continuous .value, converted to digital signals (for details see the front of the AD converter). there is no absorption of photons and the absorption of photons to the full pixel values are "0" and "255", which represents pure black and pure white. The figure .only 16 pixel sensor, the sensor pixels can be rapidly absorbed photons during the exposure. </ P> <P align=center> </ P> <P> Once these pixels loaded, the photon will overflow. Overflow .will lead to information (details) loss to red, for example, high light spill so full of the red pixel values of other nearby pixels have become 255, but in fact they did not reach the true value of 255. In other words, the picture .details of a loss. in the histogram part we have already mentioned some of this will result in the high light information is missing. On the other hand, if we reduce the high light exposure time to prevent overflow, a lot of pixels used to describe the dark environment is not enough time .receiving photon volume, resulting pixel value is 0, so that it will lead to dark parts of the missing information. </ P> <P> Through the above description, we can now understand why the digital SLR will have a greater dynamic range. .The reason is simple: the larger the pixel digital SLR. not too big a pixel is "filled", so described in the dim light environment, the environment pixel pixel in the description "full" before, have more time to absorb .photon, the picture will be more rich detail. </ P> <P> example of the dynamic range </ P> <P align=center> </ P> <P align=center> the dynamic range of the camera and scene dynamic range of basic .match. histogram shows that there is a wealth of photos highlight and shadow detail. </ P> <P align=center> </ P> <P align=center> camera's dynamic range smaller than the dynamic range of the scene. histogram shows photos .missing highlight detail and shadow detail. </ P> <P align=center>.