atom feed3 messages in com.googlegroups.aforgeRe: Image Recognition (finding one im...
FromSent OnAttachments
OBalertAug 5, 2007 9:27 am 
Andrew KirillovAug 6, 2007 2:17 am 
OBalertAug 22, 2007 7:27 am 
Subject:Re: Image Recognition (finding one image within another)
From:OBalert (
Date:Aug 22, 2007 7:27:55 am

Andrew - I would be very grateful if you could point me to a few of these algorithms (searching sub image of the same dimension), or better still C# or java implementations, what I need is one which finds all matches and not just the first - regards OB.

On 6 Aug, 10:17, Andrew Kirillov <> wrote:


If you know the exact position of the small sub image in the bigger image, then potentially you may do some comparison using Difference filter. But at this point there is no automated tool for searching sub image in bigger image.

Do you have a task of searching sub image of the same dimension? Or it may be scaled? If we are searching for sub image of the same dimension, then it should be easy to implement using the simplest algorithm.

Sincerely, Andrew

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On Aug 6, 12:27 am, OBalert <> wrote:

I'm sorry to ask what I'm sure is a very naive question, but.... is it currently possible to use to defect one image within another; i.e. detect that it exists (within given tolerances), providing it's location (either edge or centre) and is fast.

Products like 'Macro Scheduler' and 'AutoHotKey' provide the ability via commands such FindImagePos and ImageSearch and both work very well.

Any guidance would be most welcome.