Defination of Digital Camera
A camera that stores images digitally rather than recording them on film. Once a picture has been taken, it can be downloaded to a computer system, and then manipulated with a graphics program and printed. Unlike film photographs, which have an almost infinite resolution, digital photos are limited by the amount of memory in the camera, the optical resolution of the digitizing mechanism, and, finally, by the resolution of the final output device. Even the best digital cameras connected to the best printers cannot produce film-quality photos. However, if the final output device is a laser printer, it doesn't really matter whether you take a real photo and then scan it, or take a digital photo. In both cases, the image must eventually be reduced to the resolution of the printer.
History of digital camera
One of thdigital cameras was SONY ProMavica MVC-5000. It has appeared in 1989. The word "MAVICA" stands for Magnetic Video Camera. The camera worked as follows: it recorded images as magnetic impulses on a compact 2-inch still-video floppy disk. The images were captured on the disk by using two CCD (charge-coupled device) chips. One chip stored luminance information and the other separately recorded the chrominance information. This camera provided a 720,000-pixel image. The images could be stored on the floppy disk either in Frame or Field mode. When Frame was selected, each picture was recorded on two tracks and up to 25 images could be recorded on each disk. When Field was selected, each picture was recorded on only one track, allowing up to 50 images to be recorded. When recorded in the Field mode, images were less detailed as compared to images recorded in the two-track Frame mode. The MVC-5000 was considered to be the leader in image quality during its time.
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Monday, May 26, 2008
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