H
Hiroshi Sako
Researcher at Hitachi
Publications - 93
Citations - 2587
Hiroshi Sako is an academic researcher from Hitachi. The author has contributed to research in topics: Feature extraction & Fiber laser. The author has an hindex of 26, co-authored 93 publications receiving 2525 citations. Previous affiliations of Hiroshi Sako include Amada Co.
Papers
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Journal ArticleDOI
Handwritten digit recognition: benchmarking of state-of-the-art techniques
TL;DR: The results of handwritten digit recognition on well-known image databases using state-of-the-art feature extraction and classification techniques are competitive to the best ones previously reported on the same databases.
Journal ArticleDOI
Handwritten digit recognition: investigation of normalization and feature extraction techniques
TL;DR: A comparison of normalization functions shows that moment-based functions outperform the dimension-based ones and the aspect ratio mapping is influential and the comparison of feature vectors shows that the improved feature extraction strategies outperform their baseline counterparts.
Journal ArticleDOI
Discriminative learning quadratic discriminant function for handwriting recognition
TL;DR: A discriminative learning algorithm to optimize the parameters of MQDF with aim to improve the classification accuracy while preserving the superior noncharacter resistance is proposed, which is justified in handwritten digit recognition and numeral string recognition.
Patent
Facial image processing
TL;DR: In this article, a camera (10) captures a subject facial image and a unit (30) generates a tracking signal containing feature extraction data, which is then used to generate a face vector.
Journal ArticleDOI
Performance evaluation of pattern classifiers for handwritten character recognition
TL;DR: The results indicate that pattern classifiers have complementary advantages and they should be appropriately combined to achieve higher performance.