论文部分内容阅读
目前广泛采用色键系统制作彩色电视节目,这种色键通常采用门控的形式来合成图象,统称为硬色键,它存在键控边缘会产生抖动及闪烁镶边等缺点,大大限制了其使用场合。本文介绍了一种新的采用相加混合形式制作色键合成图象的软色键方式,它能克服硬色键的缺点,并提供了在更普通的摄象条件下制作高质量合成图象的可能性。本文着重讨论软色键信号的产生原理及方法,提出一种新的最佳的软色键矩阵的数学表示式及产生这种矩阵的电路原理,提供了完成各种功能的电路原理及方框图。给出了试验结果及用以说明不同场合下合成图象的效果的照片。
At present, the color key system is widely used to produce color television programs. Such color keys usually use a gated form to synthesize images, which are collectively referred to as hard color keys. The key edges of the color keys produce jitter, flicker and flanger, which greatly limits Its use occasions. This paper presents a new soft-color key method for making color-key composite images by adding and mixing forms, which overcomes the shortcomings of hard-color keys and provides for the production of high-quality composite images at more general imaging conditions The possibility of. This article focuses on the principle and method of generating soft-color signal, presents a new mathematical expression of the best soft-color matrix and the circuit principle of this kind of matrix, and provides the circuit principle and block diagram of various functions. The results of the experiment and photographs showing the effect of the composite image on different occasions are given.