Converting an image from Cartesian to Polar - Limb Darkening?

import numpy as np import cv2 from matplotlib import pyplot as plt img = cv2.imread('C:\\Users\\not my user name\\D...

Dlib on painted face?

Will Dlib facial landmark predictor work with unreal faces like this one, if I manually set rectangle with the face?...

Robust tracking of blobs?

I have an image feature extraction problem. The input images are binary (black and white) and may contain blobs of ...

How to detect black shaped contour on photo with OpenCV-Python?

I am trying to detect black shape on photo like this. So far i have picture with shape but still on there is man...

Overlapping shapes recognition (OpenCV)?

I have a simple image containing some shapes: some rectangles and some ellipses, in total number of 4 or 5. The shap...

Recognize open and closed shapes opencv?

how to detect open and closed shapes in opencv. These are simple sample shapes I want to detect. I have detected ...

How do I perform an image warp or transformation from one coordinate system to another for a barrel distorted image??

I have used this question to help me come up with an undistorted coordinated system of an image. Now, I'm not sure h...

How to determine whether two edge images should match?

I am using background subtraction to see if something has entered the viewpoint of my camera. Sometimes, this is re...

problem in determining arrow direction in an image?

I have detected existing arrows and shapes in an image and i want to know , how to determine where the arrow is comi...

OpenCV: Searching for pixels along single-pixel branches?

I'm currently trying to find a neat way of storing separate "branches" in a binary image. This little animation expl...

How to create a semi transparent shape??

I would like to know how to draw semi-transparent shapes in OpenCV, similar to those in the image below (from http:/...

Finding separate centroids of each white spots in a frame??

I'm doing finger detection i.e. the fingertips using VGA camera. I have used HSV and image thresholding and I am abl...

Align profile face image with its frontal face image?

I have a profile face: and a frontal face image: Output: aligned profile face with reference to frontal face. ...

How to detect bullet holes on the target using Android Opencv?

I am working in a project where I have to scan the target and recognize the holes in the target and have to score ac...