diff options
Diffstat (limited to 'DCP/darkchannel.cpp')
| -rw-r--r-- | DCP/darkchannel.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/DCP/darkchannel.cpp b/DCP/darkchannel.cpp new file mode 100644 index 0000000..a6cd530 --- /dev/null +++ b/DCP/darkchannel.cpp | |||
| @@ -0,0 +1,51 @@ | |||
| 1 | #include "dcp_core.h" | ||
| 2 | |||
| 3 | static inline int minbgr(int b, int g, int r) | ||
| 4 | { | ||
| 5 | b = b > g ? g : b; | ||
| 6 | b = b > r ? r : b; | ||
| 7 | return b; | ||
| 8 | } | ||
| 9 | |||
| 10 | void CalcDarkChannel(IplImage *darkchannel, IplImage *input, int radius) | ||
| 11 | { | ||
| 12 | int height = input->height; | ||
| 13 | int width = input->width; | ||
| 14 | int widthstep = input->widthStep; | ||
| 15 | int gwidthstep = darkchannel->widthStep; | ||
| 16 | int nch = input->nChannels; | ||
| 17 | |||
| 18 | int st_row, ed_row; | ||
| 19 | int st_col, ed_col; | ||
| 20 | |||
| 21 | for (int i = 1; i <= height; i++) | ||
| 22 | { | ||
| 23 | for (int j = 1; j <= width; j++) | ||
| 24 | { | ||
| 25 | st_row = i - radius, ed_row = i + radius; | ||
| 26 | st_col = j - radius, ed_col = j + radius; | ||
| 27 | |||
| 28 | if (st_row <= 0) | ||
| 29 | st_row = 1; | ||
| 30 | if (ed_row > height) | ||
| 31 | ed_row = height; | ||
| 32 | if (st_col <= 0) | ||
| 33 | st_col = 1; | ||
| 34 | if (ed_col > width) | ||
| 35 | ed_col = width; | ||
| 36 | |||
| 37 | int min = 0; | ||
| 38 | int tmp[3]; | ||
| 39 | for (int m = st_row; m <= ed_row; m++) | ||
| 40 | { | ||
| 41 | for (int n = st_col; n <= ed_col; n++) | ||
| 42 | { | ||
| 43 | for (int k = 0; k < 3; k++) | ||
| 44 | tmp[k] = *(uchar *)(input->imageData + (i - 1) * widthstep + (j - 1) * nch + k); | ||
| 45 | min = minbgr(tmp[0], tmp[1], tmp[2]); | ||
| 46 | } | ||
| 47 | } | ||
| 48 | *(uchar *)(darkchannel->imageData + (i - 1) * gwidthstep + (j - 1)) = min; | ||
| 49 | } | ||
| 50 | } | ||
| 51 | } | ||