1) The lens main functions: the light is focused onto a CCD or CMOS image sensor , play the role of adjusting the focal length . For an ideal distance fixed focus digital camera , lens, focal plane between the object and is accurately calculated , thereby fixing the position of the lens and iris . For ZOOM digital camera, there is a mechanical device that can drive the lens groups before and after exercise , has been so central in the focal plane of the lens to maintain , able to capture the distance of the object from the lens.8iiservice manual download site

2) CCD (CMOS) image sensor main functions : the image signal coming from the lens into an electrical signal simulation .8iiservice manual download site

3) A / D converters Main functions: converting an electric signal using the simulation of digital cameras A / D converter of the CCD to a digital signal generated and transmitted to the image processing unit .8iiservice manual download site

4 ) Digital Signal Processor Main Features: The main function of a digital signal processor through a series of complex mathematical algorithms , such as addition, subtraction, multiplication, division , integration , etc. to optimize the digital image signal processing ( including : white balance, color balance , gamma correction and edge correction ) .8iiservice manual download site

5 ) Image compression function: digital camera image processing includes data compression, image compression is designed to save storage space, using the JPEG encoder in the image is converted to a compressed still images (JPEG format ) .8iiservice manual download site

6 ) The main function of the overall control circuit : the master program the chip (MCU) to coordinate and control the metering, computing , exposure, flash control and shooting logic control. When the power is turned on , MCU will start from checking each function is normal, if normal, the camera is ready state.8iiservice manual download site

How it works:8iiservice manual download site

In the process of using a digital camera , half- press the shutter at the subject of the scene ( shutter ON state , with film cameras contrast ) , the light coming through the lens image from photoelectric converter (CCD or CMOS) sensor will be converted into an optical signal a corresponding simulation signal, and then a / D converter analog to digital converter , into a digital electrical signal to the simulation , and finally through the image processor DSP (Digital Signal Processor) program and the master chip (MCU) according to a specified file format , the image is displayed in binary digital form on the LCD, such as pressing the shutter , put the images stored in memory. Digital camera work steps can roughly be divided as follows :

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