#?import?the?necessary?packages
import?numpy?as?np
import?argparse
import?time
import?cv2
import?os
?
#?construct?the?argument?parse?and?parse?the?arguments
ap?=?argparse.ArgumentParser（）
ap.add_argument（“-i“?“--image“?required=True
????help=“path?to?input?image“）
ap.add_argument（“-y“?“--yolo“?required=True
????help=“base?path?to?YOLO?directory“）
ap.add_argument（“-c“?“--confidence“?type=float?default=0.5
????help=“minimum?probability?to?filter?weak?detections“）
ap.add_argument（“-t“?“--threshold“?type=float?default=0.3
????help=“threshold?when?applying?non-maxima?suppression“）
args?=?vars（ap.parse_args（））

#?load?the?COCO?class?labels?our?YOLO?model?was?trained?on
labelsPath?=?os.path.sep.join（[args[“yolo“]?“coco.names“]）
LABELS?=?open（labelsPath）.read（）.strip（）.split（“\n“）
?
#?initialize?a?list?of?colors?to?represent?each?possible?class?label
np.random.seed（42）
COLORS?=?np.random.randint（0?255?size=（len（LABELS）?3）
????dtype=“uint8“）

#?derive?the?paths?to?the?YOLO?weights?and?model?configuration
weightsPath?=?os.path.sep.join（[args[“yolo“]?“yolov3.weights“]）
configPath?=?os.path.sep.join（[args[“yolo“]?“yolov3.cfg“]）
?
#?load?our?YOLO?object?detector?trained?on?COCO?dataset?（80?classes）
print（“[INFO]?loading?YOLO?from?disk...“）
net?=?cv2.dnn.readNetFromDarknet（configPath?weightsPath）

#?load?our?input?image?and?grab?its?spatial?dimensions
image?=?cv2.imread（args[“image“]）
（H?W）?=?image.shape[:2]
?
#?determine?only?the?*output*?layer?names?that?we?need?from?YOLO
ln?=?net.getlayerNames（）
ln?=?[ln[i[0]?-?1]?for?i?in?net.getUnconnectedOutlayers（）]
?
#?construct?a?blob?from?the?input?image?and?then?perform?a?forward
#?pass?of?the?YOLO?object?detector?giving?us?our?bounding?boxes?and
#?associated?probabilities
blob?=?cv2.dnn.blobFromImage（image?1?/?255.0?（416?416）
????swapRB=True?crop=False）
net.setInput（blob）
start?=?time.time（）
layerOutputs?=?net.forward（ln）
end?=?time.time（）
?
#?show?timing?information?on?YOLO
print（“[INFO]?YOLO?took?{:.6f}?seconds“.format（end?-?start））

#?initialize?our?lists?of?detected?bounding?boxes?confidences?and
#?class?IDs?respectively
boxes?=?[]
confidences?=?[]
classIDs?=?[]

#?loop?over?each?of?the?layer?outputs
for?output?in?layerOutputs:
????#?loop?over?each?of?the?detections
????for?detection?in?output:
????????#?extract?the?class?ID?and?confidence?（i.e.?probability）?of
????????#?the?current?object?detection
????????scores?=?detection[5:]
????????classID?=?np.argmax（scores）
????????confidence?=?scores[classID]
?
????????#?filter?out?weak?predictions?by?ensuring?the?detected
????????#?probability?is?greater?than?the?minimum?probability
????????if?confidence?>?args[“confidence“]:
????????????#?scale?the?bounding?box?coordinates?back?relative?to?the
????????????#?size?of?the?image?keeping?in?mind?that?YOLO?actually
????????????#?returns?the?center?（x?y）-coordinates?of?the?bounding
????????????#?box?followed?by?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????138??2019-01-04?20:03??物體識別成功案例\.idea\encodings.xml

?????文件????????294??2019-01-04?20:03??物體識別成功案例\.idea\misc.xml

?????文件????????307??2019-01-04?20:03??物體識別成功案例\.idea\modules.xml

?????文件????????239??2019-01-04?20:05??物體識別成功案例\.idea\other.xml

?????文件???????7044??2019-01-04?20:28??物體識別成功案例\.idea\workspace.xml

?????文件????????534??2019-01-04?20:04??物體識別成功案例\.idea\物體識別成功案例.iml

?????文件??????54989??2019-01-04?19:57??物體識別成功案例\images\bird.jpg

?????文件??????51596??2019-01-04?20:01??物體識別成功案例\images\people1.jpg

?????文件?????940204??2019-01-04?20:16??物體識別成功案例\output\1.PNG

?????文件?????894003??2019-01-05?12:49??物體識別成功案例\output\2.PNG

?????文件????????705??2019-01-04?16:33??物體識別成功案例\yolo-coco\coco.names

?????文件???????9131??2019-01-04?16:33??物體識別成功案例\yolo-coco\yolov3.cfg

?????文件???????4499??2019-01-04?20:13??物體識別成功案例\yolo.py

?????文件????????284??2019-01-06?17:13??物體識別成功案例\說明.txt

?????目錄??????????0??2019-01-04?20:28??物體識別成功案例\.idea

?????目錄??????????0??2019-01-04?20:14??物體識別成功案例\images

?????目錄??????????0??2019-01-05?12:49??物體識別成功案例\output

?????目錄??????????0??2019-01-04?19:51??物體識別成功案例\yolo-coco

?????目錄??????????0??2019-01-04?20:30??物體識別成功案例

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