opencv3.0

问题 I am trying to recreate the view of a camera from a spherical projection, so that the resulting image is orthographic (straight lines in reality equate to straight lines in the image space). I have used the sphericalWarper warp function before with success: detail::SphericalWarper Projection = detail::SphericalWarper(((360.0/PX2DEG)/PI)/2.0); Mat SrcProj; Projection.warp(Src, CameraIntrinsics, Rotation, INTER_LINEAR, 0,SrcProj); But when I use the function warpBackward , it requires me to

问题 I am attempting to migrate some OpenCV image analysis (using Python3) from a local Jupyter notebook to Google Colab. My original Jupyter Notebook code works fine, and the video renders fine (in its own Window) (see a subset of the code below). This code uses cv2.imshow() to render the video. When using the same "cv2.imshow()" code in Colab, the video doesn't render. Based on this suggestion - I switched to using cv2_imshow()in Colab. However, this change leads to a vertical series of 470

问题 I have work on code for recognition hand gesture using Hu Moment extraction feature, but when i start to debug, a notification appears that Debug Assertion Failed! Vector subscript out of range. someone told me that I you have a bug in my code, but I still can't figured it out. Please help me. Here's the crashed code //function hand image declare and preprocessing image //function contour detection //function bounding box int main() { VideoCapture cap(0); //capture the video from web cam if (

问题 I have work on code for recognition hand gesture using Hu Moment extraction feature, but when i start to debug, a notification appears that Debug Assertion Failed! Vector subscript out of range. someone told me that I you have a bug in my code, but I still can't figured it out. Please help me. Here's the crashed code //function hand image declare and preprocessing image //function contour detection //function bounding box int main() { VideoCapture cap(0); //capture the video from web cam if (

问题 This question already has answers here : Creating a new file, filename contains loop variable, python (4 answers) How can I concatenate str and int objects? (4 answers) Closed 19 days ago . for example. after write the video out = cv2.VideoWriter('video.avi', fourcc, fps, (int(width), int(height))) it saves a file with the name "video", I wanted that the next time I run it save the next video as video1 etc ... 来源： https://stackoverflow.com/questions/60907884/how-increment-filename-in

问题 I am new to flask and I was trying to get my openCV webcam program to send data to a flask server. However, after several tries, I was unable to do the same. My aim is to send data from webcam to a flask server. Here is the code I tried using: import os import matplotlib import numpy as np import matplotlib.pyplot as plt import copy import cv2 import requests API_ENDPOINT = "http://127.0.0.1:5000/" from flask import jsonify, Flask, make_response,request, render_template from flask_restful

问题 I know and have seen tons of documentations explaining about how to capture mouse movement within a given window using mouseclick events in opencv. What I want to know is that if is there a way to capture mouse movements (x,y co-ordinates) for the entire screen of my system. Any link, documentation or code snippet will be really helpful to proceed me with the same. 回答1: Depending on your OS, you can do that with pyautogui like this: #!/usr/bin/env python3 import time import pyautogui for i in

问题 I'm trying to convert (shift) the values of every pixel in an HSV image (taken from a frame of a video). The idea is to invert yellow and red colours into blue colour (to avoid using three threshold later in the program, when I can use just one) by inverting the red and yellow values into blue values using following equation. (Hue + 90) % 180 (in OpenCV 3 Hue is in range [0,180]) Here's what I came up with: hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV); H = hsv[:,:,0] mask= [H<75 and H>128]

问题 I want to read an image from Azure blob storage by using opencv 3 in Python 2.7. How to do this without downloading the blob to a local file? 回答1: Per my experience, you can try to use get_blob_to_bytes method to download the blob as a byte array and covert it to a opencv image, as my sample code below. from azure.storage.blob import BlockBlobService account_name = '<your-storage-account>' account_key = '<your accout key>' block_blob_service = BlockBlobService(account_name, account_key)

问题 I am using Kmeans algorithm for creating clusters in an image but I wanted to display seperate clusters of an image. Example if value of K=3 for an image then I wanted to save each seperated cluster portion in a different file. I want to implement this code using python. I have applied KMeans clustering algorithm clusters are showing but in the same plot. 回答1: Let's start with paddington on the left, and assume you have k-means clustered him down to 3 colours on the right/second image: Now we