我试图从我的网络摄像头中检测人脸,但它只检测到第一帧中出现的第一张人脸,然后它会压碎,我已经使用 mtcnn 来检测操作,检测到第一张脸(如果存在(后,它将停止捕获并粉碎并保留在屏幕上,我使用 Jupyter 笔记本作为编辑器,笔记本将继续加载.. 但它可以在不使用检测器的情况下正常工作mtcnn
! 但是当第一帧中没有人脸时,它会引发此错误 每当我在for box in boxes:
之前使用if boxes:
错误:列出索引超出范围
但如果有一张脸,它会引发这个错误:
ValueError:具有多个元素的数组的真值不明确。使用 a.any(( 或 a.all((
但是如果没有人脸可以检测,我不会使用if boxes:
它将引发此错误:
类型错误:"NoneType"对象不可迭代
如果在第一帧中检测到人脸,那么在检测到人脸后它将保持加载状态!
capture = cv2.VideoCapture(0)
while(True):
ret, frame = capture.read()
frames_tracked = []
print('rTracking frame: {}'.format(i + 1), end='')
frame_pil = cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)
frame_pil = Image.fromarray(frame_pil)
boxes,_ = mtcnn.detect(frame_pil)
frame_draw = frame_pil.copy()
draw = ImageDraw.Draw(frame_draw)
for box in boxes:
draw.rectangle(box.tolist(), outline=(255, 0, 0), width=6)
frames_tracked.append(frame_draw.resize((640, 360), Image.BILINEAR))
d = display.display(frames_tracked[0], display_id=True)
i = 1
try:
while True:
d.update(frames_tracked[i % len(frames_tracked)])
i += 1
except KeyboardInterrupt:
pass
if cv2.waitKey('q') == 27:
break
capture.release()
cv2.destroyAllWindows()
请我必须完成我最后一年的项目
我无法在我的 PC 中重现它,但也许会出现一个例外:
import cv2
i = 0
capture = cv2.VideoCapture(0)
while(True):
ret, frame = capture.read()
frames_tracked = []
print('rTracking frame: {}'.format(i + 1), end='')
frame_pil = cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)
frame_pil = Image.fromarray(frame_pil)
boxes = []
boxes,_ = mtcnn.detect(frame_pil)
frame_draw = frame_pil.copy()
draw = ImageDraw.Draw(frame_draw)
try:
for box in boxes:
draw.rectangle(box.tolist(), outline=(255, 0, 0), width=6)
frames_tracked.append(frame_draw.resize((640, 360), Image.BILINEAR))
except ValueError:
print("Oops! ...")
d = display.display(frames_tracked[0], display_id=True)
i = 1
try:
while True:
d.update(frames_tracked[i % len(frames_tracked)])
i += 1
except KeyboardInterrupt:
pass
if cv2.waitKey('q') == 27:
break
capture.release()
cv2.destroyAllWindows()
如果这不起作用。也许只是检查框是否为无?
if boxes is not None:
for box in boxes:
print("seems to work")