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问题 I used Hough lines to get intersection of horizontal and vertical lines in this image: but the complexity grows with the grid cells count significantly. Is there any simple way to complete the grid without using line detection ? Thank you. 回答1: Here's a potential solution using morphological operations with OpenCV Obtain binary image. Load image, grayscale, Gaussian blur, Otsu's threshold Obtain horizontal/vertical lines masks. Create horizontal/vertical kernel and isolate horizontal/vertical

问题 i try to do the following: Download a PDF file to memory Convert the first page to an image Use that image with tweepy I tried the following code, but run into an error. from PIL import Image from pdf2image import convert_from_path from urllib.request import urlopen from io import StringIO, BytesIO url = 'http://somedomain.com/assets/applets/internet.pdf' scrape = urlopen(url) # for external files pdfFile = BytesIO(scrape.read()) pdfFile.seek(0) pages = convert_from_path(pdfFile,last_page=1,

问题 I want to write a python code that downloads 'main' image from urls that contain images. I have urls like these in my data (text files) http://t.co/fd9F0Gp1P1 points to an fb image http://t.co/0Ldy6j26fb points to twitter image but their expanded urls don't result in .jpg,.png images. Instead they direct us to a page that contains the desired image. How do I download images from these urls? 回答1: Here you will find an example of how I downloaded the plane image from the facebook page, you can

问题 I want to write a python code that downloads 'main' image from urls that contain images. I have urls like these in my data (text files) http://t.co/fd9F0Gp1P1 points to an fb image http://t.co/0Ldy6j26fb points to twitter image but their expanded urls don't result in .jpg,.png images. Instead they direct us to a page that contains the desired image. How do I download images from these urls? 回答1: Here you will find an example of how I downloaded the plane image from the facebook page, you can

问题 Question about using images in React! Importing a pic and then using it works: import photo from "../img/profilephoto.jpg" <img src={photo} /> Using props as the source inside a require() works: <img src={require(`../img/${this.props.img}`)} /> But importing an object (with more objects), and then using navigation to get a string, does not work! import text from "../text" // This is the object wich contains more objects <img src={require(`../img/${text.contact.photo}`)} /> Error because "text

问题 Question about using images in React! Importing a pic and then using it works: import photo from "../img/profilephoto.jpg" <img src={photo} /> Using props as the source inside a require() works: <img src={require(`../img/${this.props.img}`)} /> But importing an object (with more objects), and then using navigation to get a string, does not work! import text from "../text" // This is the object wich contains more objects <img src={require(`../img/${text.contact.photo}`)} /> Error because "text

问题 Question about using images in React! Importing a pic and then using it works: import photo from "../img/profilephoto.jpg" <img src={photo} /> Using props as the source inside a require() works: <img src={require(`../img/${this.props.img}`)} /> But importing an object (with more objects), and then using navigation to get a string, does not work! import text from "../text" // This is the object wich contains more objects <img src={require(`../img/${text.contact.photo}`)} /> Error because "text

问题 I'd like to draw a red border around an image, but can't figure out how. I've tried to fill the image of the Hero sprite and set the colorkey to red self.image.set_colorkey(red) , but that makes the image invisible. Drawing a red rect onto the image, just filled it completely: pygame.draw.rect(self.image, red, [0, 0, width, height]) . I just want a red border that will help with collision detection in the future. The code in main.py : import pygame from pygame import * import sprites from

问题 I'd like to draw a red border around an image, but can't figure out how. I've tried to fill the image of the Hero sprite and set the colorkey to red self.image.set_colorkey(red) , but that makes the image invisible. Drawing a red rect onto the image, just filled it completely: pygame.draw.rect(self.image, red, [0, 0, width, height]) . I just want a red border that will help with collision detection in the future. The code in main.py : import pygame from pygame import * import sprites from

问题 Well, I have this code: http://jsfiddle.net/hv9gB/3/ (function() { var img = document.getElementById('my_image'); // Original var width, height; // Display var d_width = img.width; var d_height = img.height; var updateDetail = function() { document .getElementById('display_size') .innerHTML = 'Display Size: ' + d_width + ' x ' + d_height; document .getElementById('native_size') .innerHTML = 'Original Size: ' + width + ' x ' + height; }; // Using naturalWidth/Height if (img.naturalWidth) {