One Millisecond Face alignment with an Ensemble of Regression Trees
摘要:
這篇paper 主要是解決了單個圖片的face alignment 問題。我們給出了迴歸樹的集合用來評估臉部的landmark 點的位置。直接從畫素強度的稀疏子集,達到超實時的表現。我們給出了一個一般的框架基於gradient boosting 為了學習迴歸樹的集合優化the sum of square error loss 同時自然的處理丟失或者部分被標註的資料(此處是啥意思,face alignment 與丟失的資料與部分標註的資料有半毛錢關係)。我們how using appropriate priors explicting the structure of image data helps with 有效的特徵提取。不同的歸一化策略和他的重要性用來打敗overfitting 也被研究。
方法:
我們的方法利用了regressors的一個級聯。
2.1 the cascade of regressors
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One Millisecond Face alignment with an Ensemble of Regression Trees
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【論文筆記】One Millisecond Face Alignment with an Ensemble of Regression Trees
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