add face detection

1 files changed, 31 insertions, 0 deletions

diff --git a/anime-face-detector/nms/gpu_nms.pyx b/anime-face-detector/nms/gpu_nms.pyx
new file mode 100644
index 0000000..55878db
--- /dev/null
+++ b/anime-face-detector/nms/gpu_nms.pyx
@@ -0,0 +1,31 @@
+# --------------------------------------------------------
+# Faster R-CNN
+# Copyright (c) 2015 Microsoft
+# Licensed under The MIT License [see LICENSE for details]
+# Written by Ross Girshick
+# --------------------------------------------------------
+
+import numpy as np
+cimport numpy as np
+
+assert sizeof(int) == sizeof(np.int32_t)
+
+cdef extern from "gpu_nms.hpp":
+    void _nms(np.int32_t*, int*, np.float32_t*, int, int, float, int)
+
+def gpu_nms(np.ndarray[np.float32_t, ndim=2] dets, np.float thresh,
+            np.int32_t device_id=0):
+    cdef int boxes_num = dets.shape[0]
+    cdef int boxes_dim = dets.shape[1]
+    cdef int num_out
+    cdef np.ndarray[np.int32_t, ndim=1] \
+        keep = np.zeros(boxes_num, dtype=np.int32)
+    cdef np.ndarray[np.float32_t, ndim=1] \
+        scores = dets[:, 4]
+    cdef np.ndarray[np.int64_t, ndim=1] \
+        order = scores.argsort()[::-1]
+    cdef np.ndarray[np.float32_t, ndim=2] \
+        sorted_dets = dets[order, :]
+    _nms(&keep[0], &num_out, &sorted_dets[0, 0], boxes_num, boxes_dim, thresh, device_id)
+    keep = keep[:num_out]
+    return list(order[keep])