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    • 81. 发明授权
    • Pose-invariant face recognition system and process
    • US07127087B2
    • 2006-10-24
    • US10983194
    • 2004-11-05
    • Fu Jie HuangHong-Jiang ZhangTsuhan Chen
    • Fu Jie HuangHong-Jiang ZhangTsuhan Chen
    • G06K9/00G06K9/62
    • G06K9/00228G06K9/00288G06K9/6292
    • A face recognition system and process for identifying a person depicted in an input image and their face pose. This system and process entails locating and extracting face regions belonging to known people from a set of model images, and determining the face pose for each of the face regions extracted. All the extracted face regions are preprocessed by normalizing, cropping, categorizing and finally abstracting them. More specifically, the images are normalized and cropped to show only a persons face, categorized according to the face pose of the depicted person's face by assigning them to one of a series of face pose ranges, and abstracted preferably via an eigenface approach. The preprocessed face images are preferably used to train a neural network ensemble having a first stage made up of a bank of face recognition neural networks each of which is dedicated to a particular pose range, and a second stage constituting a single fusing neural network that is used to combine the outputs from each of the first stage neural networks. Once trained, the input of a face region which has been extracted from an input image and preprocessed (i.e., normalized, cropped and abstracted) will cause just one of the output units of the fusing portion of the neural network ensemble to become active. The active output unit indicates either the identify of the person whose face was extracted from the input image and the associated face pose, or that the identity of the person is unknown to the system.
    • 90. 发明授权
    • Image retrieval systems and methods with semantic and feature based relevance feedback
    • 图像检索系统和方法具有基于语义和特征的相关性反馈
    • US07529732B2
    • 2009-05-05
    • US10900574
    • 2004-07-28
    • Wen-Yin LiuHong-Jiang ZhangYe Lu
    • Wen-Yin LiuHong-Jiang ZhangYe Lu
    • G06F17/30
    • G06F17/30265G06F17/30256G06F19/00Y10S707/99933Y10S707/99934Y10S707/99935
    • An image retrieval system performs both keyword-based and content-based image retrieval. A user interface allows a user to specify queries using a combination of keywords and examples images. Depending on the input query, the image retrieval system finds images with keywords that match the keywords in the query and/or images with similar low-level features, such as color, texture, and shape. The system ranks the images and returns them to the user. The user interface allows the user to identify images that are more relevant to the query, as well as images that are less or not relevant to the query. The user may alternatively elect to refine the search by selecting one example image from the result set and submitting its low-level features in a new query. The image retrieval system monitors the user feedback and uses it to refine any search efforts and to train itself for future search queries. In the described implementation, the image retrieval system seamlessly integrates feature-based relevance feedback and semantic-based relevance feedback.
    • 图像检索系统执行基于关键词和基于内容的图像检索。 用户界面允许用户使用关键字和示例图像的组合来指定查询。 根据输入查询,图像检索系统查找与查询中的关键字匹配的关键字和/或具有类似低级特征(如颜色,纹理和形状)的图像。 系统对图像进行排序并将其返回给用户。 用户界面允许用户识别与查询更相关的图像,以及与查询较少或不相关的图像。 用户可以选择通过从结果集中选择一个示例图像并在新查询中提交其低级特征来优化搜索。 图像检索系统监视用户反馈,并使用它来优化任何搜索工作,并训练自己以用于将来的搜索查询。 在所描述的实现中,图像检索系统将基于特征的相关性反馈和基于语义的相关性反馈无缝集成。