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数码影像的噪点一直是摄影师非常头痛的问题,相机制造厂商也在不断进行着各种尝试,试图降低数码影像的噪点。一方面通过不断改进数码相机影像感应器的结构,从硬件方面来减少画面的噪点;另一方面则借助于影像处理器,通过软件的方式降低噪点对画面的影响。但实际上产生数码影像噪点的因素会很多,这就需要我们对此有充分的认识,从而在相机的选择、拍摄和后期处理中尽可能地避免画面噪点的产生或画面噪点的恶化。
Digital image noise has always been a photographer’s headache, camera manufacturers are also constantly trying to reduce the noise of digital images. On the one hand, through continuous improvement of the structure of the digital camera image sensor, the noise of the picture is reduced from the aspect of hardware; on the other hand, the effect of the noise on the picture is reduced by means of the software by the image processor. However, there are actually many factors that cause the digital image noise. Therefore, we need to know enough about it to avoid the noise of the picture or the noise of the picture as much as possible during the selection, shooting and post-processing of the camera.