OpenCV错误:在setSize中断言失败(s&>;=0)-尝试将图像放置在网络摄像头提要上时

本教程将介绍OpenCV错误:在setSize中断言失败(s&>;=0)-尝试将图像放置在网络摄像头提要上时的处理方法,这篇教程是从别的地方看到的,然后加了一些国外程序员的疑问与解答,希望能对你有所帮助,好了,下面开始学习吧。

OpenCV错误:在setSize中断言失败(s&>;=0)-尝试将图像放置在网络摄像头提要上时 教程 第1张

问题描述

我试图在网络摄像头提要中覆盖头上的帽子图像,但在以下行中遇到错误-

hat = cv2.resize(imghat, (hatWidth,hatHeight), interpolation = cv2.INTER_AREA)

程序运行,但很快退出并出现上述错误。代码段如下所示-

# Create the mask for the hat
imghatGray = cv2.cvtColor(imghat, cv2.COLOR_BGR2GRAY)
#cv2.imwrite("imghatGray.png", imghatGray)

ret, orig_mask = cv2.threshold(imghatGray, 0, 255, cv2.THRESH_BINARY)
#cv2.imwrite("orig_mask.png", orig_mask)

# Create the inverted mask for the hat
orig_mask_inv = cv2.bitwise_not(orig_mask)
#cv2.imwrite("orig_mask_inv.png", orig_mask_inv)

# Convert hat image to BGR
# and save the original image size (used later when re-sizing the image)
imghat = imghat[:,:,0:3]
orighatHeight, orighatWidth = imghat.shape[:2]

video_capture = cv2.VideoCapture(0)

while True:

 ret, frame = video_capture.read()

 gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

 faces = face_cascade.detectMultiScale(gray, 1.3, 5, flags=cv2.cv.CV_HAAR_SCALE_IMAGE)

 for (x, y, w, h) in faces:
  cv2.rectangle(frame, (x,y), (x+w, y+h), (255,0,0), 2)

  roi_gray = gray[y:y+h, x:x+w]
  roi_color = frame[y:y+h, x:x+w]

  hatWidth = w
  hatHeight = hatWidth * orighatHeight / orighatWidth

  # Center the hat
  x1 = x -15
  x2 = x + hatWidth + 15
  y1 = y - hatHeight
  y2 = y + 15

  # Check for clipping
  if x1 < 0:
x1 = 0
  if y1 < 0:
y1 = 0
  if x2 > w:
x2 = w
  if y2 > h:
y2 = h

  cv2.rectangle(frame, (x1,y1), (x2, y2), (0,255,0), 2)

  # Re-calculate the width and height of the hat image
  hatWidth = x2 - x1
  hatHeight = y2 - y1

  # Re-size the original image and the masks to the hat sizes
  # calcualted above
  hat = cv2.resize(imghat, (hatWidth,hatHeight), interpolation = cv2.INTER_AREA)
  mask = cv2.resize(orig_mask, (hatWidth,hatHeight), interpolation = cv2.INTER_AREA)
  mask_inv = cv2.resize(orig_mask_inv, (hatWidth,hatHeight), interpolation = cv2.INTER_AREA)

  # take ROI for hat from background equal to size of hat image
  roi = roi_color[y1:y2, x1:x2]

  # roi_bg contains the original image only where the hat is not
  # in the region that is the size of the hat.
  roi_bg = cv2.bitwise_and(roi,roi,mask = mask_inv)

  # roi_fg contains the image of the hat only where the hat is
  roi_fg = cv2.bitwise_and(hat,hat,mask = mask)

  # join the roi_bg and roi_fg
  dst = cv2.add(roi_bg,roi_fg)

  # place the joined image, saved to dst back over the original image
  roi_color[y1:y2, x1:x2] = dst

  break

这是显示的错误消息-

v2错误:函数集中的/home/vinravun/opencv-2.4.10/modules/core/src/matrix.cpp:116:错误:(-215)s>=0

推荐答案

没有足够的详细信息,但您尝试调整大小的图像之一似乎是空的。

您知道此错误发生在调整大小的哪一行上吗?

您可能应该在捕获网络摄像头图像后检查它是否包含任何内容。

好了关于OpenCV错误:在setSize中断言失败(s&>;=0)-尝试将图像放置在网络摄像头提要上时的教程就到这里就结束了,希望趣模板源码网找到的这篇技术文章能帮助到大家,更多技术教程可以在站内搜索。