# EasyFind - Matching Geometric Patterns **EasyFind** is a pattern matching library that allows users to learn and identify given patterns in an image.  ## Process ### Learning **EasyFind** learns your pattern from one or several images or a set of shapes. * The pattern is a set of all the [feature points](purpose_and_principles.html.md#easy-find-principle) that **EasyFind** computes during the learning process: - **EasyFind** can extract these points from a bitmap representation of the pattern (see [Learn a Pattern from Image(s)](learning.html.md)). - Or it can use the feature points that are directly given by geometrical shapes (see [Learn a Pattern from Vectors](learn_the_model_from_vectors.html.md)). ### Finding **EasyFind** detects the instances of your pattern in your images as a vector of [`EFoundPattern`](../../../doxygen_cpp/classeVision_1_1EFoundPattern.html) [_.NET](../../../doxygen_cs/classeVision_1_1EFoundPattern.html) [_Python](../../../doxygen_python/classeVision_1_1EFoundPattern.html) (see [Find Matches](finding.html.md)). * Each `EFoundPattern` contains a `Score`, `Center`, `Angle` and `Scale`. * These `EFoundPattern` can be highly-degraded due to noise, blur, occlusion, missing parts or unstable illumination conditions. - To optimize the find process, adjust the search parameters and check what **EasyFind** has found. ## Contents Purpose and Principles of the **EasyFind** library. How to learn a pattern from an image. How to learn a pattern from an set of shapes or a `dxf` file. How to find a learned pattern inside of an image. ## Quick Links List of all Classes, Structs and Enumerations of the **EasyFind** library. Code snippets for the **EasyFind** library. #### SEE ALSO Some **eVision Studio** samples illustrate several aspects of the **EasyFind** library: * `Find a pattern`: Uses **EasyFind** to find a pattern in an image. * `Learn a pattern with a region`: Uses `ERegion` to specify pattern precisely. * `Find a vector pattern`: Learns a vector pattern from a `dxf` file. * `Learn multiple patterns`: Learns several patterns with a single `EPatternFinder`.