1931CIE-XYZ-标​ 准​ 色​ 度​ 观​ 察​ 者​ 三​ 刺​ 激​ 值​ 曲​ 线，图像处理必读基础知识。-1931 cie XYZ- standard color see three stimulating value curve, basic knowledge of image processing is required.

使用qt做的一个屏幕剪切小程序，主要利用到的知识点有QPixmap，以及QTimer等，适合初学者对qt的基本知识点进行学习-Use qt do a screen cut small program, mainly to take advantage of the knowledge points have QPixmap, and QTimer, etc., suitable for beginners the basic knowledge of learning qt