cv2

问题 I have tried to rectify this issue by using pip install opencv-python pip install opencv-contrib-python pip uninstall panda pip install panda conda install opencv-python Some info is that im currently using python 3.6.10 and Windows 10. opencv-python 4.2.0.32 numpy 1.18.1 panda 0.3.1 tensorflow-gpu 1.14.0 I created a new env but cant seem to import cv2 over on Jupyter Notebook. My earlier environment was able to do so. When i tried to pip install the opencv-python==4.1.2.30 (from the old

问题 I am working on converting 3D real-world points (X,Y,Z) meters to image coordinates (u, v) pixels. I have access to the Camera matrix K, camera orientation (in degrees) and translation vector. I use the code below to calculate the pixel coordinates. For (X,Y,Z) = (0.04379281, 0.15902013, 0.73328906) , I obtain (u, v) = (-184.52735432, -249.19158505) on an image of size 352x287 px . Is the origin of pixel coordinates in the image still top left corner? If yes, the obtained pixel location is

问题 I am working on converting 3D real-world points (X,Y,Z) meters to image coordinates (u, v) pixels. I have access to the Camera matrix K, camera orientation (in degrees) and translation vector. I use the code below to calculate the pixel coordinates. For (X,Y,Z) = (0.04379281, 0.15902013, 0.73328906) , I obtain (u, v) = (-184.52735432, -249.19158505) on an image of size 352x287 px . Is the origin of pixel coordinates in the image still top left corner? If yes, the obtained pixel location is

问题 I am using openCv for making video processing. What I do is reading a video frame by frame, then applying some processing on each frame and then displaying the new modified frame. My code looks like that : video_capture = cv2.VideoCapture('video.mp4') while True: # Capture frame-by-frame ret, frame = video_capture.read() # Applying some processing to frame . . . # Displaying the new frame with processing img=cv2.imshow('title', frame) if cv2.waitKey(1) & 0xFF == ord('q'): break This way I can

问题 I want to convert a rgb image into cmyk. This is my code the first problem is, when I divide each pixel by 255 the value closes to zero so the result image is approximately black! The second problem is, I don't know how to convert the 1 channel resulted image to 4 channel. Of course I'm not sure the made CMYK in the following code is correct. Thank you for your attention import cv2 import numpy as np import time img = cv2.imread('image/dr_trump.jpg') B = img[:, :, 0] G = img[:, :, 1] R = img[

问题 I want to convert a rgb image into cmyk. This is my code the first problem is, when I divide each pixel by 255 the value closes to zero so the result image is approximately black! The second problem is, I don't know how to convert the 1 channel resulted image to 4 channel. Of course I'm not sure the made CMYK in the following code is correct. Thank you for your attention import cv2 import numpy as np import time img = cv2.imread('image/dr_trump.jpg') B = img[:, :, 0] G = img[:, :, 1] R = img[

问题 I want to convert a rgb image into cmyk. This is my code the first problem is, when I divide each pixel by 255 the value closes to zero so the result image is approximately black! The second problem is, I don't know how to convert the 1 channel resulted image to 4 channel. Of course I'm not sure the made CMYK in the following code is correct. Thank you for your attention import cv2 import numpy as np import time img = cv2.imread('image/dr_trump.jpg') B = img[:, :, 0] G = img[:, :, 1] R = img[

问题 I'm working on a face detection project and want to know if opencv provides support for heic format in imread() and imwrite() methods? Can an image be read using cv2's imread() and written using cv2.imwrite() functions? (Language being used: Python3.6) 来源： https://stackoverflow.com/questions/60951161/does-opencv-support-heic-image-format

问题 I created images from OpenCV/opencv-python (numpy.array) and I want to convert them to a pygame.Surface object: def cv2ImageToSurface(cv2Image): pygameSurface = # ? create from "cv2Image" return pygameSurface surface = cv2ImageToSurface(cv2Image) Some of the images have 3 channels ( BGR ) and some of the images also have an alpha channel ( BGRA ). What do I have to do in cv2ImageToSurface to convert images with one of the formats into a pygame.Surface object? 回答1: The shape attribute of a

问题 This question already has answers here : PyQt showing video stream from opencv (3 answers) Closed last year . I'm creating a GUI using Python/PyQt5 which should display a video along with other widgets in the same window. I've tried different approaches to this problem but stil can't seem to get it to work. Approach 1: Adding the video in a pixmap using OpenCV/cv2 only shows the first frame of the video. Approach 2: I have managed to get the video to play using cv2 however, it opens up in a