论文部分内容阅读
在我们使用家用摄像机拍摄影像的时候可能通常使用的是程序自动曝光模式。这样可以免去调整焦距和调整光圈的麻烦,在很多的情形下,程序自动曝光模式工作得很好,我们拍出的影片令自己非常满意。但你是否遇到过这样的情况:拍摄的对象处于很亮的背景前面,或者被摄物前面部照明严重不足,也就是通常所说的逆光拍摄。这时,使用自动模式拍出来的效果就不尽人意了。画面背景显得比较亮,但却不会过度曝光,相映之下,被拍摄的主体则显得很暗,前面部细节无法很好的体现出来。这时,我们就要用到大多数家用摄像机都提供的一项功能:逆光拍摄(BackLight)。
The program AE mode that you may normally use when we shoot images with a home video camera. This eliminates the need to adjust the focus and adjust the aperture of the trouble, in many cases, the program AE mode works very well, we shoot the film so that he is very satisfied. But you have encountered such a situation: the subject is photographed in front of a very bright background, or a serious lack of illumination of the front of the subject, which is commonly referred to as backlight shooting. At this time, the effect of using automatic mode is not satisfactory. The background of the picture looks brighter, but not over-exposed. In contrast, the subject being photographed looks very dark and the details of the front part can not be well represented. At this point, we’ll use one of the features that most home video cameras offer: BackLight.