# EasyObject - Analyzing Blobs **EasyObject** is the ***blob analysis*** library of **eVision**. A ***blob*** is a grouping of neighboring pixels of the same gray level range. The pixels from a ***blob*** are connected: there exists a path between any couple of pixels from the blob that is entirely within the blob. This is also called *connected-componenent analysis*. **EasyObject** can be used on [`BW8`](../../../doxygen_cpp/classeVision_1_1EImageBW8.html) [.NET](../../../doxygen_cs/classeVision_1_1EImageBW8.html) [Python](../../../doxygen_python/classeVision_1_1EImageBW8.html), [`BW16`](../../../doxygen_cpp/classeVision_1_1EImageBW16.html) [.NET](../../../doxygen_cs/classeVision_1_1EImageBW16.html) [Python](../../../doxygen_python/classeVision_1_1EImageBW16.html) and [`C24`](../../../doxygen_cpp/classeVision_1_1EImageC24.html) [.NET](../../../doxygen_cs/classeVision_1_1EImageC24.html) [Python](../../../doxygen_python/classeVision_1_1EImageC24.html) images and its processing can be restricted to [ROIs](../../basic_operations/regions/regions_of_interest.html.md) and to complex [regions](../../basic_operations/regions/arbitrarily_shaped_roi__eregion_.html.md). ## Process and Workflow * It works by ***encoding*** an image into a ***coded image***. The [`encoder`](../../../doxygen_cpp/classeVision_1_1EImageEncoder.html) [.NET](../../../doxygen_cs/classeVision_1_1EImageEncoder.html) [Python](../../../doxygen_python/classeVision_1_1EImageEncoder.html) classifies the image into several ***layers*** with ***image segmenters*** and builds the ***blobs*** from the selected ***layers***. * It can compute various ***features*** for each objects (for example its area, bounding box, etc.). * These ***features*** can be used to select, filter, or sort the ***blobs*** with [`EObjectSelection`](../../../doxygen_cpp/classeVision_1_1EObjectSelection.html) [.NET](../../../doxygen_cs/classeVision_1_1EObjectSelection.html) [Python](../../../doxygen_python/classeVision_1_1EObjectSelection.html). * The [`object template matcher`](../../../doxygen_cpp/classeVision_1_1EObjectTemplateMatcher.html) [.NET](../../../doxygen_cs/classeVision_1_1EObjectTemplateMatcher.html) [Python](../../../doxygen_python/classeVision_1_1EObjectTemplateMatcher.html) can be used to align and match the ***blobs*** to a reference image. * There are two kinds of ***blobs***: * ***objects*** that are built directly by the encoder from the segmentation of the image * ***holes*** that are built from the ***objects***. * Both types of ***blobs*** have the same class, named [`ECodedElement`](../../../doxygen_cpp/classeVision_1_1ECodedElement.html) [.NET](../../../doxygen_cs/classeVision_1_1ECodedElement.html) [Python](../../../doxygen_python/classeVision_1_1ECodedElement.html). ![image](assets/images/easyobject/holesconstructionwhitelayer.webp) ## Contents Segment and build blobs. Build holes and computes various features. Select and sort objects and holes. Matching objects to a template. Validate images using a Golden Template. ## Quick Links List of all Classes, Structs and Enumerations of the **EasyObject** library. Code snippets for the **EasyObject** library.