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The defense date of the thesis is 2015-02-11
The current date is 2019-07-18
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URN etd-0210115-163908 Statistics This thesis had been viewed 821 times. Download 0 times. Author Kuan-Wha Chen Author's Email Address No Public. Department Computer Science and Enginerring Year 2014 Semester 1 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 35 Title Study on Application of Object Detection with WHT Keyword Haar-like feature Hadamard Transform object detection object detection Hadamard Transform Haar-like feature Abstract Haar-like feature extraction and Adaboost algorithm were applied to the human face detection in the beginning. Then they were widely used in the detection to other objects. In previous study, the Walsh-Hadamard transform is applied to replace the integral image and Haar-like feqtures to obtain the features of images. Through the Adaboost learning the process is used to detect human face.
In this these, the other object detection of Walsh-Hadamard transform and Adaboost algorithm is studied, including the windows of building, the license plate of cars and wheels of motorcycles. Furthermore, in addition to the original Haar-like features, the Sobel operator is used to find the gradient. The direction of the gradient is calculated to obtain the cumulative histogram. And the Haar-like features are extracted from the histogram. These three experiments are studied to evaluate the effects of the learning samples with detection results and the influence in the angle of the object.
From the experiment can be found that: less learning samples are needed with application of the Walsh-Hadamard transformation to get a good detection results. The changes in the angle of the object is less than original Haar-like features methods. Therefore, the conclusion that the object detection with Walsh-Hadamard transformation can replace the Haar-like features in the applications of objects detection.
Advisor Committee Chia-Ming Chang - advisor
Jong-Jiann Shieh - co-chair
Shih-Ming Cho - co-chair
Files Date of Defense 2015-01-29 Date of Submission 2015-02-11