image-processing

问题 How can I get the colour values of pixels of an image that is blitted onto a pygame surface? Using Surface.get_at() only returns the color of the surface layer, not the image that has been blitted over it. 回答1: The method surface.get_at is fine. Here is an example showing the difference when blitting an image without alpha channel. import sys, pygame pygame.init() size = width, height = 320, 240 screen = pygame.display.set_mode(size) image = pygame.image.load("./img.bmp") image_rect = image

问题 I am a beginner in opencv-python. I want to get all the X and Y coordinates of for the region of the interest mentioned in the code and store it in an array. Can anyone give me an idea on how to proceed? I was able to run the code, but is not showing any results. Image for detecting all the X and Y coordinates The sample code i wrote is written below, import cv2 import numpy as np import matplotlib.pyplot as plt import imutils img = cv2.imread("/home/harikrishnan/Desktop/image.jpg",0) img1 =

问题 I am a beginner in opencv-python. I want to get all the X and Y coordinates of for the region of the interest mentioned in the code and store it in an array. Can anyone give me an idea on how to proceed? I was able to run the code, but is not showing any results. Image for detecting all the X and Y coordinates The sample code i wrote is written below, import cv2 import numpy as np import matplotlib.pyplot as plt import imutils img = cv2.imread("/home/harikrishnan/Desktop/image.jpg",0) img1 =

问题 I want to take screenshot of a perticular section of my screen in a iOS App. The attached image is that part of screen. Here I want to take screenshot of the red marked rectangular area containing 3 UIImageViews which contains a white Image Frame at background , an image with coffee cup and the apple sign image on the coffee respectively. I am using the following code for doing that... - (UIImage *)captureView:(UIView *)view withArea:(CGRect)screenRect { UIGraphicsBeginImageContext(screenRect

问题 I want to take screenshot of a perticular section of my screen in a iOS App. The attached image is that part of screen. Here I want to take screenshot of the red marked rectangular area containing 3 UIImageViews which contains a white Image Frame at background , an image with coffee cup and the apple sign image on the coffee respectively. I am using the following code for doing that... - (UIImage *)captureView:(UIView *)view withArea:(CGRect)screenRect { UIGraphicsBeginImageContext(screenRect

问题 I am trying to use tesseract-OCR to print text from the image. But I am getting the above error. I have installed tesseract OCR using https://github.com/UB-Mannheim/tesseract/wiki and pytesseract in the anaconda prompt using pip install pytesseract but its not working. Please help if anyone has faced the similar issue. (base) C:\Users\500066016>pip install pytesseract Collecting pytesseract Downloading https://files.pythonhosted.org/packages/13/56

问题 I am working on a shape detection algorithm with opencv in python . I am using Contours from the library and I have had some shapes being detected successfully: Circle, Rectangle and Triangle. The only problem is that I only need to detect circles rectangles and octagons. Also, the circle was working, but inconsistently. So, this is my code: import cv2 import numpy as np def nothing(x): # any operation pass cap = cv2.VideoCapture(1) cv2.namedWindow("Trackbars") cv2.createTrackbar("L-H",

问题 I am working on a shape detection algorithm with opencv in python . I am using Contours from the library and I have had some shapes being detected successfully: Circle, Rectangle and Triangle. The only problem is that I only need to detect circles rectangles and octagons. Also, the circle was working, but inconsistently. So, this is my code: import cv2 import numpy as np def nothing(x): # any operation pass cap = cv2.VideoCapture(1) cv2.namedWindow("Trackbars") cv2.createTrackbar("L-H",

问题 I am working on a shape detection algorithm with opencv in python . I am using Contours from the library and I have had some shapes being detected successfully: Circle, Rectangle and Triangle. The only problem is that I only need to detect circles rectangles and octagons. Also, the circle was working, but inconsistently. So, this is my code: import cv2 import numpy as np def nothing(x): # any operation pass cap = cv2.VideoCapture(1) cv2.namedWindow("Trackbars") cv2.createTrackbar("L-H",

问题 I am working on a shape detection algorithm with opencv in python . I am using Contours from the library and I have had some shapes being detected successfully: Circle, Rectangle and Triangle. The only problem is that I only need to detect circles rectangles and octagons. Also, the circle was working, but inconsistently. So, this is my code: import cv2 import numpy as np def nothing(x): # any operation pass cap = cv2.VideoCapture(1) cv2.namedWindow("Trackbars") cv2.createTrackbar("L-H",