图像处理中常遇到“亚像素”这个词。亚像素实际上不存在，但是在想象中存在。于是用数学的方法计算出它的值。示例中将一幅图的高和宽都扩大到5倍，造成原来相邻两像素不相邻了，中间间隔了好几个像素单位，这些像素怎样定义它们，简单的，数学上用双线性插值的方法求出未知的像素。本程序提供一个代码示例，供参考，希望对您有帮助。-Frequently encountered in image processing "sub-pixel" is the word. Sub-pixel does not actually exist, but exist in the imagination. So using mathematical methods to calculate its value. Sample will be a picture height and width are expanded to five times, resulting in two adjacent original pixels are not adjacent, and an interval of several pixels, the pixels how to define them, a simple, mathematically using bilinear interpolation method to calculate the unknown pixels. This program provides a code sample, for reference, hope you have help.