论文部分内容阅读
数字相机是介于传统胶片照相机和扫描仪之间的一种新产品,它的前端使用光学的镜头,电子测光系统光圈和电子快门来聚焦图像,这和传统的胶片照相机相同。它与传统相机最明显的不同是其图像不是聚焦到光敏卤化银胶片上,而是聚焦到称之为CCED(电荷耦合器)的半导体芯片上。数字照相机将成相数据送到模数转换器(anolong—to—digital COnverter,ADC)芯片,再经过压缩,最后记录在内置的存储器芯片或可插拨的PC卡上。数字相机的出现使摄影界迎来了数字化时代,使影像信息的转换、存储、处理发生了革命性的变化 数字相机从按下快门到相机真正捕获图像之间有长达1.5秒的延迟。这段时间用于光学传感器对影象进行判断,然后调整电路通道或改变快门速度,检查自动聚焦,触发照相机闪光灯,影象信息由CCD进行光电转换后成为电信号,再经过模/数(A/D)转换,变成数字信息,数字信号可由数字相机内部的闪速存储器保存,也可由计算机保存和处理。
The digital camera is a new product between traditional film cameras and scanners. Its front end focuses on images using optical lenses, electronic metering aperture and electronic shutter, the same as with traditional film cameras. The most obvious difference from a traditional camera is that its image is not focused on light-sensitive silver halide films but instead focuses on a semiconductor chip called CCED (Charge Coupled Device). The digital camera sends the phase-in data to an ADC (aolong-to-digital converter) chip that is compressed and finally recorded on a built-in memory chip or pluggable PC card. The advent of digital cameras has brought the photography world to the digital age, revolutionizing the conversion, storage, and handling of image information. The digital camera lags 1.5 seconds between the moment the shutter is pressed and the camera actually captures the image. This time for the optical sensor to determine the image, and then adjust the circuit channel or change the shutter speed, check the autofocus, trigger the camera flash, the image information by the CCD photoelectric conversion into an electrical signal, and then through the analog / digital (A / D) conversion, into digital information, digital signals can be digital camera internal flash memory can also be saved and processed by the computer.