OpenBR [3] is a framework for investigating new modalities, improving existing algorithms, interfacing with commercial systems, measuring recognition performance, and deploying automated biometric systems. The project is designed to facilitate rapid algorithm prototyping, and features a mature core framework, flexible plugin system, and support for open and closed source development. Off-the-shelf algorithms are also available for specific modalities including Face Recognition, Age Estimation, and Gender Estimation.
OpenBR originated within The MITRE Corporation from a need to streamline the process of prototyping new algorithms. The project was later published as open source software under the Apache 2 license and is free for academic and commercial use.
Openbr是一個框架，用於調研新模型、提升已有算法、和商業模型組合，衡量識別以及構建自動化的生物識別系統。這個項目用於快速迭代算法模型、構建一個成熟的核心架構、靈活插件系統、支持開源以及封閉的源代碼。現成的算法也同樣適用於這套框架，包括人臉識別、年齡預估和姿態判斷。
Openbr起源於MTTRE組織，一個簡化原型設計的新算法的組織。這個項目後來在開源軟件公佈，並且免費用於學術和商業。
matricies, and many other extensions can be interpreted by format plugins.
A Gallery represents a template list on disk either be fore or after enrollment. The NIST .xml signature set and OpenBR binary .gal are the standard plugins for storing template lists before and after enrollment, though many others exist including Weka .arff.
An Output represents the result of comparing two galleries. The NIST .mtx binary similarity matrix is the preferred output,though many others exist including .rr rank retrieval and .csv plain text score matrix.
A Transform is a single step in a template generation algorithm, it applies the same image processing or numerical analysis algorithm to every template it receives. Transforms can be either trainable (e.g., LDA) or untrainable (e.g.,LBP). Time-varying transforms also exist to support objecttracking in video.
A Distance is capable of comparing two templates and returning a similarity score. OpenBR supports many common similarity metrics including norm-based, cosine, Chi-squared, and Bhattacharyya. Section 4.5 discusses a
particular distance metric novel to OpenBR.
Commercial algorithms can also be added to OpenBR by wrapping them in Transform and Distance plugins. To date, six commercial systems have been leveraged through the OpenBR API.