编写一个程序，在屏幕上出现一个圆心沿正弦曲线轨迹移动的实心圆，而且，每隔四分之一周期，圆的填充色和圆的周边颜色都发生变化，同时，圆的半径在四分之一周期之内由正弦曲线幅值的0.2倍至0.6倍线性增长。-Write a program that appears on the screen along a sinusoidal trajectory of the center moving solid round, and every quarter cycle, the circle around

SIFT算法代码，C++的，确认可用，并提供opencv和gsl以及相关安装方法-SIFT algorithm code, C++ confirmation available, and provide opencv and gsl installation method

据悉，根据计算机图形绘制，这是自行车将运行。-It is learned according to the computer graphics drawn to, this is a bicycle will be running.