Stack Overflow
Stack Overflow

Questions tagged [image-comparison]

Methods, algorithms and techniques for the programmatic comparison of image data.

Methods, algorithms and techniques by which images can be programmatically compared, either to one another or to a database of extracted image features.

Meaningful image comparison will typically involve the extraction of some of features from the images in question, as metadata. Many techniques for feature extraction (and subsequent feature selection) come from the content-based image retrieval field.

Typical image-comparison schemes necessitate some manner of image processing as well.

206 questions
0
votes
0 answers

OpenCV ORB Matching multiple images Java

Ok, so I am a university student busy doing my year project. Essentially what I am trying to do is allow the user to have a "x" amount of images that they will save to their android device. Once the user has saved these images they can "scan" using…
Nicholas Mott
  • 102
  • 3
  • 13
0
votes
1 answer

How to Optimise OpenCV Histogram Comparison for Image Similarity?

I use example code to compare HSV histograms using EMD. I want to find similar images in people's (mobile) picture library. It's quite common that people take several images of the same subject (in a row) with just slight changes: zooming in/out a…
meaning-matters
  • 21,929
  • 10
  • 82
  • 142
0
votes
3 answers

work with image: imgcompare does not support list?

import imgcompare ... for filename in os.listdir(myPath): if filename.endswith(".png"): listIm1.append(filename) for filename2 in os.listdir(myPath2): if filename2.endswith(".png"): listIm2.append(filename2) so i fill…
mario Letterman
  • 45
  • 7
0
votes
1 answer

Extract pixel values from array of images for comparison

I have fifty aerial images stored in an array, in a Processing script (.pde). I want to calculate the amount of 'green' in each pixel of each image, based on RGB colour space, to compare against a separate, target image. The aim is to find which of…
the_bonze
  • 325
  • 1
  • 4
  • 11
0
votes
0 answers

Key Point classification in an image

I am trying to compare two image of drawings using corner features in the images. Here is a sample image: Query image: I used SIFT algorithm to compare images but it did not work because in SIFT we consider a window of 16X16 pixel to extract the…
flamelite
  • 2,654
  • 3
  • 22
  • 42
0
votes
0 answers

perceptual hash compare metric algorithm

I implemented a near-duplicate image detecting system using Imagemagick API. After reading several research papers, I got to know that there are two main types of image comparison techniques: 1) feature based image comparison approach and 2) pixel…
Sach
  • 1
  • 1
0
votes
0 answers

OpenCV: How to detect small differences in different images of the same object

I've been trying to detect if a printed image has any defects(shape and color) when compared to either a proof of another printed image which has no defects or the digital version of the image, which also has no defects. I'm using opencv(cv2) and…
Danthony
  • 5
  • 4
0
votes
0 answers

Features matching OpenCV

I am using this code for matching features on two images. The output is not that accurate, have lots of positive negatives. How is it possible to increase the accuracy overall? output Main Image import numpy as np import cv2 from…
Anastasiya
  • 1
  • 2
0
votes
1 answer

retrieving data from a link list of File and comparing the obtain image with the existing image

i am trying to obtain File from the link list of File and then compare the obtained image with the existing image on imageView but it is giving null pointer exception enter code here files.stream().map((file) ->…
Syed Taha Alam
  • 13
  • 1
0
votes
1 answer

How to work out two images's degree of similarity using php

there are two jpg files binary data,how to work out their degree of similarity using php. if it is possible to get color infomation from binary code.what's more ,the server cant surport gd,it's a delegate server.
zhangrt
  • 11
  • 2
0
votes
0 answers

Which camera did it come from?

So, here's the situation. I have direct access to two devices, and can take as many pictures as I want with each. Both devices are the same make and model, and do not save any metadata that would distinguish one from the other. This means that they…
The Elemental of Destruction
  • 161
  • 14
0
votes
2 answers

compare images on different OS

As part of automation, I want to compare images by taking screenshot and the baseline image. Will be executing the same on different OS(linux, win). On executing in different OS, the screen resolution changes and image comparison fails. Currently I…
user1960750
  • 61
  • 6
0
votes
1 answer

Android compare 2 images and tell to fruit category to is fruit (apple/banana) or not fruit

Android compare 2 images to use Bitmap code and tell to fruit category to is fruit (apple/banana) or not fruit. I have problem to compare with Bitmap and BitmapFactory to have runtime error , I have solution to problem. activity_main.xml …
user4046183
0
votes
0 answers

How to determine the disappearence of a blurry spot in a video

I am considering frames of a video of a single object (black and white chess board) where there is a certain blur moving to different spots on the object as time goes on. What I need is to determine when the blur ceases to be. I was thinking of…
user49719
  • 11
  • 1
0
votes
1 answer

euclidean algorithm for image comparison

i am going to develop an application for image comparison on java. For this i have choosen euclidean algorithm. This application involves with 2 images. 1. Actual image 2. Part of the actual image. Algorithm should compare the part of the image with…
janasainik
  • 811
  • 5
  • 20
  • 40
1 2 3
…
13 14