我正在尝试使用OpenCV Python在我自己的直播视频流上叠加衬衫图像 . 三天以来我一直困在这个特定的错误:
错误:(-215)(mtype == CV_8U || mtype == CV_8S)&& _mask.sameSize(* psrc1)in function cv :: binary_op
此错误发生在此行:
roi_bg = cv2.bitwise_and(roi,roi,mask = mask_inv)
我的代码:
import cv2 # Library for image processing
import numpy as np
imgshirt = cv2.imread('C:/Users/sayyed javed ahmed/Desktop/Humaira/Images For Programs/aureknayashirt.png',1) #original img in bgr
musgray = cv2.cvtColor(imgshirt,cv2.COLOR_BGR2GRAY) #grayscale conversion
ret, orig_mask = cv2.threshold(musgray,150 , 255, cv2.THRESH_BINARY)
orig_mask_inv = cv2.bitwise_not(orig_mask)
origshirtHeight, origshirtWidth = imgshirt.shape[:2]
face_cascade=cv2.CascadeClassifier('C:\Users\sayyed javed ahmed\Desktop\Humaira\haarcascade_frontalface_default.xml')
cap=cv2.VideoCapture(0)
while True:
ret,img=cap.read()
gray=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
faces=face_cascade.detectMultiScale(gray,1.3,5)
for (x,y,w,h) in faces:
cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
shirtWidth = 3 * w #approx wrt face width
shirtHeight = shirtWidth * origshirtHeight / origshirtWidth #preserving aspect ratio of original image..
# Center the shirt..just random calculations..
x1 = x-w
x2 =x1+3*w
y1 = y+h
y2 = y1+h*2
# Check for clipping(whetehr x1 is coming out to be negative or not..)
if x1 < 0:
x1 = 0
if y1 < 0:
y1 = 0
if x2 > 4*w:
x2 =4*w
if y2 > 2* h:
y2 = x2* origshirtHeight / origshirtWidth
print x1 #debugging
print x2
print y1
print y2
print w
print h
# Re-calculate the width and height of the shirt image(to resize the image when it wud be pasted)
shirtWidth = x2 - x1
shirtHeight = y2 - y1
# Re-size the original image and the masks to the shirt sizes
shirt = cv2.resize(imgshirt, (shirtWidth,shirtHeight), interpolation = cv2.INTER_AREA) #resize all,the masks you made,the originla image,everything
mask = cv2.resize(orig_mask, (shirtWidth,shirtHeight), interpolation = cv2.INTER_AREA)
mask_inv = cv2.resize(orig_mask_inv, (shirtWidth,shirtHeight), interpolation = cv2.INTER_AREA)
# take ROI for shirt from background equal to size of shirt image
roi = img[y1:y2, x1:x2]
print shirt.size #debugginh
print mask.size
print mask_inv.size
print roi.size
print shirt.shape
print roi.shape
print mask.shape
print mask_inv.shape
# roi_bg contains the original image only where the shirt is not
# in the region that is the size of the shirt.
roi_bg = cv2.bitwise_and(roi,roi,mask = mask_inv)
# roi_fg contains the image of the shirt only where the shirt is
roi_fg = cv2.bitwise_and(shirt,shirt,mask = mask)
print roi_bg.shape #debugging
print roi_fg.shape
# join the roi_bg and roi_fg
dst = cv2.add(roi_bg,roi_fg)
print dst.shape
# place the joined image, saved to dst back over the original image
roi = dst
break
cv2.imshow('img',img)
if cv2.waitKey(1) == ord('q'):
break;
cap.release() # Destroys the cap object
cv2.destroyAllWindows() # Destroys all the windows created by imshow
我已经读过这个帖子:http://www.stackoverflow.com/questions/30117740/opencv-error-assertion-failed-mask-size-src1-size-in-binary-op但是避风港't grasped much. I know that the size of roi and shirt should be same,I printed the values to check if they'是一样的,但事实并非如此 . 根据我的说法:
roi = img [y1:y2,x1:x2]
和
shirt = cv2.resize(imgshirt,(shirtWidth,shirtHeight),interpolation = cv2.INTER_AREA)
应该将它们的大小都设为x2-x1和y2-y1,但这种情况并没有发生 . 自从三天以来一直在这条线上摸不着头脑,任何帮助都表示赞赏!
2 回答
这个错误很可能来自你摆弄x和y变量和衬衫大小的地方,而不确定它们是否适合网络摄像头饲料的框架 .
我将您的代码重新编写为工作代码:
我重命名变量以使它们更容易掌握 . 我将衬衫图像和haarcascade XML路径设置为工作目录以进行本地测试 . 我在创建roi bg和fg时也切换了面具,不完全确定为什么这是必要的,但这给出了正确的结果 . 最后添加
img[shirt_y1:shirt_y2, shirt_x1:shirt_x2] = dst
实际上将衬衫粘贴到视频帧中 .另外需要注意的是,在处理numpy图像时,总是将任何除法结果转换为
int
.face recognition with shirt webcam capture
您是否确保覆盖的图像不会超过前景大小,因为这通常是导致掩码大小不同的原因