Digital camera.

In early days picture was recorded on flexible stripe of celluloid film when it goes through chemical change in silver form. This type of method was carried for more than 200 years. Now a days picture are recorded in electronic form by digital camera. This recording of image in digital form is performed by charge coupled device (CCD). A clear image is recorded by CCD with millions of picture element i.e pixel. To miniaturized the TV or computer screen, it works in opposite way. Electrical signal generated by collision between light and pixels varys according to light color and brightness. This signal generated by CCD are analogue and varys with wave like fashion. Electronic pulses of this image are represented by digital codes of number converted by microchip. This digital signal are processed and added to memory devices whether it is internal or removable memory to store it. Some other way to output this data are by any wireless link and by cable source. Function of camera depends on programme run by it's integrated circuit.