OpenCV Q&A Forum - RSS feed

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To find the coordinates of corners detected by Harris corner detection

March 12, 2018, 8:58 am

I have applied harris corner detection on the following image ![Input Image](/upfiles/15208690158801906.jpg) and obtained the result as ![Image after Harris corner...

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how to solve cv2.face_LBPHFaceRecognizer object has no attribute 'load' ?

March 12, 2018, 9:16 pm

I used the attribute read() instead of load() to bring .yml file into my project. How con I create a recognizer with opencv 3.4.0 in python 3.6.4 64bit ?

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Distances to surroundings in image

March 13, 2018, 8:33 am

using a rotating robot and kinect depth data I am able to create a bw-image of the surroundings of my robot (black is free space, white are obstacles). The robot is looking for a tag and if not found...

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How to add gloss to the lips using Opencv Python ?

March 13, 2018, 9:33 am

Hi, I have identified the facial landmarks using dlib and have all the lips points. Now, I want to add gloss to the lips. How can I achieve it using Opencv Python? I am stuck since long, any help is...

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Selecting various part of an image as forground using grabcut

March 13, 2018, 5:36 pm

I want to be able to select various part of an image as my foreground(probably with a rectangle) and color the background with any color of my choice. How do i go about this?

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medianBlur from imgproc not working with python bindings?

November 20, 2012, 8:56 am

Hi there, I don't really know if this is the right place to ask since I am using a windows 64 bit beta version of the openCV python bindings but here we go: When using a numpy array as source I get a...

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About python version of ridge detection

March 13, 2018, 7:03 pm

After installing the opencv, I try use the ridge detection function https://docs.opencv.org/3.4.1/d4/d36/classcv_1_1ximgproc_1_1RidgeDetectionFilter.html#details It seems there is no attribute...

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Finding relatively large objects in a cluttered background - Help needed

March 14, 2018, 2:13 am

I am relatively a newbie to Computer Vision and am struggling with working on complex cluttered images.I need to find relatively large objects that are bigger than a certain threshold in a cluttered...

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ImageMagick / OpenCV equivalent

March 14, 2018, 2:47 pm

Hi. Sorry for the noob question. I started a project with ImageMagick, and for performance reasons I'm trying to move it to OpenCV. I'm having a hard time to reproduce the exact same steps, and the...

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Split an image into 2 parts based on a line

March 15, 2018, 7:04 am

Hi, ![image description](/upfiles/15211224317573869.png) I am looking split an image into two parts. After doing some math in know the (x1, y1) of the top point and (x2, y2) of the bottom point. y1 =...

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Coverting C++ to Python

March 15, 2018, 7:58 pm

I have the following OpenCV code in c++ and I would like to convert it to python. Do any of you know how to convert those lines to python. **Mainly the Vec3f* and vector** that are found at lines 13...

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Convert Image to Occupancy Grid

March 15, 2018, 8:04 pm

I was wondering how I might turn a bird's eye view image of a map into an occupancy grid. I use an edge detection algorithm to detect obstacles in the bird's eye view image and would like to then...

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[Python]Manipulating histogram values

March 15, 2018, 9:25 pm

Hi! Well, i'm fairly new to Python but i have some coding background on some other languages like C. I could have gone for C++ but i wanted to learn Python so here i am, treading on unknown territory...

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Find Average Intensity of ROI

March 16, 2018, 3:26 am

I was wondering how to find the average intensity of a gray scaled ROI. I currently use the code below, however when I try to print roi_gray_mean I get the output in the console ...... Below is my...

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Compare two images and mark the unmatched object or remove unmatched

March 16, 2018, 11:39 am

Hi, I want to compare two images and want to plot or remove the unmatched objects found. I was using ORB to find matches between two images, But how can I plot and show the unmatched one.

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Returning Threshold Values

March 17, 2018, 12:00 am

I am trying to return the average threshold value for a binary ROI, however, I keep on getting a weird output. My code is : import cv2 import numpy as np img =...

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Detection of wounds

March 17, 2018, 4:49 am

Hi, I have problem with my school project, I need to detect chronic wounds and I am lost, I do not know how... I studied lot of color models, but I did not find any that I can apply on all photos.. I...

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Does OpenCV3.10 work with Axis FD216 Security Camera

March 17, 2018, 3:32 pm

Unable to stream video with AXIS FD216 IP Security Camera. Programming with OpenCV3.10 and Python3.5 Example – From my browser the following http://192.168.1.141/mjpg/video.mjpg brings up my...

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how can I convert an image to grayscale without losing transparency?

March 18, 2018, 3:35 pm

I'm trying to convert an image to grayscale without losing any of it's transparency. This is my code: img = cv2.imread(some_path, 0) Original image: ![image description](/upfiles/15214121276406284.png)...

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I have installed OpenCV for Python applications in Windows. I am able to...

March 19, 2018, 12:17 am

I have installed OpenCV for Python applications in Windows. I am able to access OpenCV only from Administrator login. But not from USERS login. Request your help to access OpenCV from users login. I...

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