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比較明合成による流星の検出
1.
PERC
2.
• • (HEVC,H.264,AAC,Opus,
) • •
3.
0 0.25 0.5 0.75 1 4/8 4/18 4/28
5/8 5/20 6/2 6/30 0.80495 0.88908 0.88856 0.89988 0.83184 0.86017 0.92017 0.92671 0.99791 0.97547 0.99930 0.99436
4.
• ( ) • •
5.
• z 1 2 3 |1-2|
|2-3|
6.
000029.mpg while True: ret, frame
= cap.read() if not ret: break gray = cv2.cvtColor(frame, toGray) diff = cv2.absdiff(gray, prev_gray) sum_diff += diff prev_gray = gray sum_diff[sum_diff[:,:] > 255] = 0 while True: ret, frame = cap.read() if not ret: break gray = cv2.cvtColor(frame, toGray) diff = cv2.absdiff(gray, prev_gray) diff[diff[:,:] < 24] = 0 # sum_diff += diff prev_gray = gray sum_diff[sum_diff[:,:] > 255] = 0
7.
SSD (Single Shot MultiBox
Detector) 200 178 4 18 0.80495 0.88908 https://github.com/slowsingle/labeling_for_object_detection https://github.com/rykov8/ssd_keras
8.
• 24 0 • 009888.mpg 24
0 8 0 4 28 0.88856 0.89988
9.
• • •
10.
• while True: ret, frame
= cap.read() if not ret: break gray = cv2.cvtColor(frame, toGray) max = np.maximum(max, gray) 1 009888.mpg000029.mpg 000147.mpg
11.
3. 4. 002795.mpg 000029.mpg 000040.mpg 1. 2.
12.
• RGB3ch 1ch [ 2.
158. 0. 39. 155. 0. 54. 158. 0. 150. 150. 149. 0.] [104. 0. 0. 0. 0. 0. 0. 53. 0. 150. 150. 149. 0.] [104. 0. 2. 103. 0. 0. 104. 107. 147. 149. 150. 149. 0.] [ 0. 0. 0. 158. 0. 0. 0. 0. 147. 147. 147. 147. 147.] [ 0. 103. 29. 155. 104. 53. 0. 0. 147. 147. 147. 147. 147.] [ 0. 0. 0. 0. 0. 0. 0. 145. 147. 147. 147. 147. 0.] [145. 0. 0. 0. 0. 0. 0. 145. 147. 147. 147. 0. 0.] [145. 0. 0. 0. 0. 0. 145. 145. 146. 147. 147. 0. 0.] [145. 0. 0. 0. 0. 0. 145. 145. 146. 145. 0. 0. 0.] [145. 0. 0. 0. 0. 0. 145. 145. 146. 145. 0. 0. 0.] [ 0. 0. 0. 0. 0. 0. 145. 145. 146. 145. 0. 0. 0.] [ 0. 0. 0. 0. 0. 0. 145. 145. 146. 0. 0. 0. 0.] [ 0. 0. 0. 0. 0. 0. 0. 145. 146. 0. 0. 0. 0.] [ 0. 0. 0. 0. 143. 143. 143. 0. 0. 0. 0. 0. 0.] [ 0. 0. 0. 0. 143. 143. 143. 0. 0. 0. 0. 0. 0.] [ 0. 0. 0. 0. 143. 143. 143. 0. 0. 0. 0. 0. 0.] [ 1. 0. 0. 0. 0. 143. 143. 0. 0. 0. 0. 0. 0.] [ 0. 0. 0. 0. 0. 143. 0. 0. 0. 0. 0. 0. 0.] [ 0. 0. 0. 141. 141. 143. 0. 0. 0. 0. 0. 0. 0.] [ 0. 0. 143. 141. 141. 0. 0. 0. 0. 0. 0. 0. 0.] [ 0. 0. 143. 141. 141. 141. 0. 0. 0. 0. 0. 0. 0.] 141 150 20 0
13.
194 250 R. ( ) G. (
24 0) B. SSD 1. 2. 3. 4. 5 8 0.83184 0.86017
14.
YOLOv3 (You Only Look
Once) • SSD YOLOv3 5 20 0.92017 0.92671 https://github.com/experiencor/keras-yolo3 R. ( ) G. ( 24 0) B. YOLOv3 1. 2. 3. 4.
15.
• 1 ( ) n1 n2
n3 n4 L (n2-n1) / L (n3-n2) / L (n4-n3) / L ≒2.0 / 2 R: G: B:
16.
2 ( ) • • [
0. 0. 0. 0. 0. 0. 0. 0. 0. 0.] [ 0. 0. 0. 143. 144. 143. 0. 0. 0. 0.] [ 0. 0. 0. 144. 144. 144. 0. 0. 0. 0.] [ 0. 0. 0. 143. 143. 144. 144. 0. 0. 0.] [ 0. 0. 0. 0. 144. 144. 143. 0. 0. 0.] [ 0. 0. 0. 0. 143. 143. 144. 144. 0. 0.] [ 0. 0. 0. 0. 0. 0. 143. 0. 0. 0.] [ 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.] 002597.mpg 0
17.
• • 3 ( ) / / / / >
0.8 < 0.2
18.
• cv2.createCLAHE( clipLimit=6.0, tileGridSize=(8,8))
19.
6 2 0.99791 0.97547 R. ( ) G. ( ) B. YOLO v3 1. 2. 3. 4.
20.
• • 100 0
21.
Non-local Means Filter •
Non- local Means Filter NLMeansFilter cv2.fastNlMeansDenoising(frame,None,3,7,21)
22.
R. ( ) G. ( 100 0 NLMeansFilter+ ) B. (
100 0) YOLO v3 1. 2. 3. 4. 6 30 0.99930 (2 ) 0.99436 (3 ) 194 250
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