# Face Vocabulary ### Face Analyser > Describes the part of the software that is responsible to detect and identify faces. ### Face Reference > Describes the snapshot of a face being used for the face matching during processing frames. ### Face Matching > Describes the process of comparing two faces against a given threshold, called face distance. ### Face Distance > Describes how similar two faces are. ### Face Score > Describes the confidence of the face detection. ### Face Bouncing > Describes the flicker between persons during processing frames as of failing face recognition. ### Face Jittering > Describes the moving facial features during processing frames as of unstable facial landmarks. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.facefusion.io/knowledgebase/face-vocabulary.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.