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一、概述所谓白平衡,就是在拍摄白色目标时,R、G、B具有相等的幅度。这是确保重现彩色逼真的重要因素,在此基础上可以针对任意给定的色光,相对于各种不同的亮度级,准确地反映这一色光的R、G、B三个基色分量的比例关系。但是,在拍摄过程中随着拍摄地点、环境或光源的色温等因素的变化,都将促使预置白平衡的失调,因此,在摄像机中必须采用简便而迅速的方法,以随时校正白平衡。不同照明光源具有不同的色温,在不同色温的照明下拍摄白目标,其R、G、B三通道的信号幅度比将发生变化。例如,在万次闪光光源下拍摄白色目标,通
First, an overview of the so-called white balance, that is, when shooting a white target, R, G, B have equal amplitude. This is an important factor in ensuring the reproduction of vivid colors. Based on this, it is possible to accurately reflect the ratio of the three primary color components of R, G, B with respect to any of the different brightness levels for any given color shade relationship. However, changes in shooting conditions such as location, environment, or color temperature of the light source all contribute to the offset of the preset white balance. Therefore, a simple and quick method must be employed in the camcorder to correct the white balance at any time. Different lighting sources have different color temperatures, and when the white target is shot under different color temperatures, the signal amplitude ratio of the three channels of R, G and B will change. For example, shoot a white target under a million flash light sources