在窗口中显示出26个英文字母，从左向右字母依次位置提高10个像素单位，并且颜色变为红色，然后回到正常位置。当达到最右端后改变方向，从右向左逐渐变为红色，并且位置依次提高10个像素单位。 -In the window shows the 26 English letters, the letters from left to right, followed by location of units increased by 10 pixels, and the color turns red,

曲面拟合，用于数字图像相关计算时找到极值点-Surface fitting for digital image calculated to find extreme points