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Questions tagged [template-matching]

Template matching is the process of finding a smaller known template image in another larger image.

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How do I find the percent chance that an image is in another image?

I am trying to get the percent chance that an image is in another image in OpenCV. Here are the images that I am comparing: ]2 Here is my code: import cv2 import numpy as np large_image = cv2.imread(r'Directory here') #Cropping the image so that…
pythonuser1
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Check list for similar coordinates bevor adding entry

I am working on template matching using OpenCV. The matching itself yielded all templates, however the best fits are found in multiple slight variations before all templates are found. The template should be 12 times on the checked image. However…
Pythonwürger
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Detecting a shape in noisy set of images, obtained by scanning

I have images of rocks of varied shape and texture, obtained by laser scanning (there are 300 images obtained by rotation). This means that the rock is effectively scanned in 360 degrees with slight rotation recorded by each in each image. There are…
Luka Blagojevic
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Calling Match Template in Promise.All No Performace Improvement?

I am using OpenCV4NodeJS-prebuilt for my project to use match template. I Created Two Files one being Index.js and other named matchTemlate.js In Index.js i call match template: const { matchTemplate } = require("./matchTemplate"); ... let a =…
ChandraShekharAazad
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Improve template matching with many templates for one Image/ find characters on image

The idea: I have one screenshot and want to find all characters and numbers with its postition on this image. The easiest way is to use opencv match template and compare all characters (around 800) I have as ".png" to the…
Langer
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Python - OpenCV - Detecting an object from the library in the video

I would need to detect a specific object from the library on the video input. There are various pictures in the library. Which should be gradually loaded and compared with the video input. If the read image from the library will match one object on…
Radoslav Dugas
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How to do template matching corrctly on the 7-Segments images?

I have a 7-segment image, and a template, I've tried to do template matching, but there was no matching for the provided template, can you please tell me how to improve the matching? should the template be 100% as same as the desired pattern to be…
Bilal
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Multiple template matching, electronic componets detection using ORB

I'm trying to use opencv to detect components in electronic diagrams photos. I am using ORB feature detector with BFMathcer.To detect the multiple occurences I'm using a sliding window approach for now. In my first test I tried to detect diodes on a…
Giuliano
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Matching contour or drawn (png) contour on another image

Let's say i have found a contour on an image. What is the best approach to finding the position of this contour on image 2? I see two options: Either i draw the contour with a white line and match that image on image 2 or i somehow (is this even…
ole
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How to convert pixel distances in meters distances

I'm working on cloud displacement, the main idea is to use template matching to determine the movement of the template from (x0, y0) at image t0 to (x1, y1) at image at tn+1. If I apply to those coordinates, then the euclidean distance result is…
Chacho Fuva
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Estimate displacement of the template in an image

Basically I'm trying to measure the displacemtent of the template along of the next image. I extract the roi of the image at t0, then I apply matchTemplate function on the image at t1 and finally use the euclidean distance. Here is that part of the…
Chacho Fuva
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Template matching for colored image input

I have a working code for template matching. But it only works if the input image is converted into grayscale. Is it possible to do template matching considering the template color as well that needs to be found in the given image? inputImg =…
RJ Uy
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Template Matching using PyOpenCl

I was moving ahead with more complicated aspects in image processing using opencl. Now what I tried was template matching and I am getting some results but not sure is it is correct. I think the template is matched anyway.. here are the scripts and…
Sajil
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Python OpenCV for template matching

I have a small python script using openCV that does template matching in an image and nicely returns a bounding box, as bellow. The script is size invariant as well which makes it more robust. Given the bounding box returned, how can I replace it…
Tina J
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Scanning image in opencv python

I'm struggling with my last thesis. The purpose of this code is to identifying image (which given the template too) using Template matching method that provided by OpenCV. This code supposed to be find object that having the same form with the…
Melda Nophia
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