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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.

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sub-Image comparison in c#

I am working on a WPF application where I have some screenshots. Now in all these screenshots I have to check whether any of the screenshot contains a certain smaller size image(sub-image). I have looked into different solutions but every solution…
Joy
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PHP image comparison

img_1 is created by PHP and img_2 is saved on server. I'm trying to compare those to images to see if they're different, I tried this but it doesn't work. $script_img = imagecreatetruecolor(2390, 2400); $web_img =…
ihh66042
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Face to image comparison

I'm trying to make a face recognition app that recognizes the person once it detects his face. i already done the face detection part but i couldn't find a way to compare the face to a photo from a photo album that is stored in the app. Here is the…
malcolm
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Create Memory Device Context... for a bitmap, not a device (not display)

I'm probably thinking about this all wrong, so please let me start by stating the goal: I want to compare two images by XORing them together, then save (not display) the result as a file. Actually, I want to then average all the bit values to get a…
James Newton
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Opencv find image (object) from a scene (image captured using mobile) and subtract them

I need to find image (object image) from a scene image and subtract them to remove all contours present in object image. Here is what I am doing: Object image: image created programmatically object image Scene Image: photo of printed copy of object…
d32
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Image Comparison in Android.

I'm Android learner. I was trying Image Comparison. It showed the images are not same for the same image of different size so I rescaled the image using createScaledBitmap(Bitmap src, int dstWidth, int dstHeight, boolean filter). Even after…
Mukeshkumar S
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best way to compare two images in either PHP or Python

I need to know In which language I will get best image compare script. There is some point: compare images color and background color. compare objects in images. Like first image have 1 bottle but second image have 2 bottles then script will let us…
Siddhartha Mishra
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How to compare two images which are in HSV color space using opencv?

I am working on a project which involves hand gesture recognition.I have to recognize the hand gesture and identify which letter of alphabet it represents.I am able to detect the skin using HSV color space.I have a video of all letters hand…
madhu chary
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Simple but efficient way to store a series of small changes to an image?

I have a series of images. Each one is typically (but not always) similar to the previous one, with 3 or 4 small rectangular regions updated. I need to record these changes using a minimum of disk space. The source images are not compressed, but I…
finnw
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Check presence of subimage in image in iOS

I have 2 images, say smallerImage and largerImage. Now, I want to check that does smallerImage is part(or subimage) of largerImage or not. I am not getting how to check that. I want to so this whole stuff in iOS. After gogling, i got that using…
Mehul Thakkar
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How to recognize UI elements in image?

I am trying to make an automator tool and am experimenting with a type of recording which takes screen shots and records user inputs. The idea would be for user to take a snapshot and and highlight a square on the snapshot of the "submit" button.…
user1625624
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logical and uint8 comparison

I have an image of data type logical. When I convert it to uint8 I get a blank image. I'm trying to compare this image with another image, and they have to be of the same data type. If that doesn't work, are there data types I can convert to without…
Simplicity
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Image Analysis Program Based on Hashcode Method Resulting in Errors

I am trying to write a program that will recognize an image on the screen, compare it against a resource library, and then calculate based on the result of the image source. The first thing that I did was to create the capture screen function which…
user2635188
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image processing for quality control

I am working on a college project where I have to use image processing using opencv to detect manufacturing defects in cookies. The program must be able to detect oversized, undersized, distorted cookies, cookies with cracks, etc. I am new to…
user2392772
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Need help for merging one image with another image

Suppose programmatically I was comparing between two images. After extracting the difference between two images suppose I store the difference in another Bitmap variable called bmp3 I got a code from another site which show how to merge the…
Thomas
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