DIgital camera, as u will know, differ in storage capacity. many operate dependent on computer and have no storage capacity of their own. some have in-camera storage only and others have a combination of in-camera storage supported by removal cards. however, in all cases, the photos can be erased whenever required. photos are saved safely in the camera's memory and will not be deleted until u instruct the camera or software. out of these, many cameras are mfd. to be used on location and do not require to be connected to the computer until u wish to download or transmit pictures. the MCU chip is the essential driver of the camera and monitors all tasks taking place in the camera. during power on, the MCU goes out and finds out that all the major camera components are okay. if any major component is not working, a message appears on the LCD and the camera stops working.
IN autofocus (which are generally) cameras when a person presses and holds down the shutter release button half way, the inbuilt 4-bit MPU takes a light reading and obtains the reading that how long the shutter shd remain open and how much light is necessary. the camera opens for the length of time specified by the 4-bit MPU. and for example, the charged-coupled device (CCD) captures light as red, blue and green pixels. the pixels pass thru many of the components in the camera for white balance and colour. the pixels continue on until they get 4 MB frame board. this board puts all the pixel back together in the form of a digital image.
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