Itseez/opencv — pull request #3555 by ilya-lavrenov (2014-12-29 12:41:23+00:00)
Title: SSE2 optimization of cv::integral

```
integral::Size_MatType_OutMatDepth::(127x61, 8UC1, CV_32S) 0.009 ms 0.004 ms 2.08
integral::Size_MatType_OutMatDepth::(640x480, 8UC1, CV_32S) 0.320 ms 0.170 ms 1.88
integral::Size_MatType_OutMatDepth::(1280x720, 8UC1, CV_32S) 0.977 ms 0.442 ms 2.21
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC1, CV_32S) 2.175 ms 1.148 ms 1.90
```