# 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).