Browsing by Author "Huang, Hsiang-Cheh"

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A multiple-instance neural networks based image content retrieval system
(2006)
Chuang, Shun-Chin
;
Xu, Yeong-Yuh
;
Fu, Hsin Chia
;
Huang, Hsiang-Cheh
;
資訊工程學系
In this paper, we proposed a Multiple-Instance Neural Network (MINN) for content-based image retrieval (CBIR). In order to represent the rich content of an image without precisely image segmentation, the image retrieval problem is considered as a multiple-instance learning problem. A set of exemplar images are selected by a user, each of which is labelled as conceptual related (positive) or conceptual unrelated (negative) image. Then, the proposed MINN is trained by using the proposed learning algorithm to learn the user's preferred image concept from the positive and negative examples. Experimental results show that: (1) without image segmentation and using only the color histogram as the image feature, the MINN without relevance feedback performs slightly inferior to some leading image retrieval methods, and (2) the MINN with the relevance feedback can significantly improve the retrieving performance from 40.3% to 59.3%, which outperforms to the results of some leading image retrieval methods.
A Novel Wireless Biomedical Monitoring System with Dedicated FPGA-based ECG Processor
(2012)
Chou, Chia-Ching
;
Fang, Wai-Chi
;
Huang, Hsiang-Cheh
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A novel portable and wireless biomedical monitoring system featuring on demand wireless data transmission of ECG signals and time-frequency HRV analysis for personal and home healthcare applications is presented in this work. In order to provide comfort and convenience to patients, the device's size, power consumption and portability are of first priority. The ECG processor based on previous hardware design [1] acquires three-channel ECG biomedical raw data through an analog front-end (AFE) circuit, and it measures the time between successive heart beats on lead II as RR intervals for HRV analysis. Functions such as QRS complex peak detection, RR intervals calculation, and time-frequency analysis of HRV have also been developed in hardware. A real-time HRV analysis processor is realized by employing a Lomb periodogram for time-frequency power spectral density (PSD) analysis of the heart rate. The proposed ECG monitoring system has been implemented in Field-Programmable Gate Arrays (FPGA) and it features high integration density, portability, wireless transmission and low cost.
A programming model for distributed content-based image retrieval
(2007)
Chang, Feng-Cheng
;
Huang, Hsiang-Cheh
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
With the growth of digital contents, content-based image retrieval becomes important. The huge amount of computation can be solved by distributed computing. However, to design a distributed algorithm and program it with cross-platform capability is difficult. We present a programming model which is based on list data processing, and it can be transparently executed in a distributed environment with some auxiliary tools. This model allows us to explicitly specify the parallelism without special language support, such as new reserved keywords or new directives. Although this approach may introduce non-trivial overhead in some aspects, it can be used to write a distributed program using a conventional (and often sequential) language.
Applications of Reversible Data Hiding Techniques with the Quick Response Codes
(2009)
Huang, Hsiang-Cheh
;
Chang, Feng-Cheng
;
Fang, Wai-Chi
;
交大名義發表
;
National Chiao Tung University
The goal of quick response (QR) codes aims at convenience-oriented applications for mobile phone users. People can use the mobile phone cameras to capture the code with random patterns, usually displayed at the corner of web page, and then the hyperlink corresponding to the QR code can be accessed. Since QR code looks like random noise, its existence can greatly reduce the value of the original image. With the aid of reversible data hiding technique, we propose a scheme Such that when the image containing the QR code is browsed, the hyperlink corresponding to the QR code is accessed first. Then, the QR code can get vanished and the original image can be recovered to retain the information conveyed therein. Simulation results demonstrate the applicability of the proposed algorithm.
Authenticity Preservation with Histogram-Based Reversible Data Hiding and Quadtree Concepts
(2011-10-01)
Huang, Hsiang-Cheh
;
Fang, Wai-Chi
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
With the widespread use of identification systems, establishing authenticity with sensors has become an important research issue. Among the schemes for making authenticity verification based on information security possible, reversible data hiding has attracted much attention during the past few years. With its characteristics of reversibility, the scheme is required to fulfill the goals from two aspects. On the one hand, at the encoder, the secret information needs to be embedded into the original image by some algorithms, such that the output image will resemble the input one as much as possible. On the other hand, at the decoder, both the secret information and the original image must be correctly extracted and recovered, and they should be identical to their embedding counterparts. Under the requirement of reversibility, for evaluating the performance of the data hiding algorithm, the output image quality, named imperceptibility, and the number of bits for embedding, called capacity, are the two key factors to access the effectiveness of the algorithm. Besides, the size of side information for making decoding possible should also be evaluated. Here we consider using the characteristics of original images for developing our method with better performance. In this paper, we propose an algorithm that has the ability to provide more capacity than conventional algorithms, with similar output image quality after embedding, and comparable side information produced. Simulation results demonstrate the applicability and better performance of our algorithm.
Copyright protection for images with EXIF metadata
(2008)
Huang, Hsiang-Cheh
;
Chen, Yueh-Hong
;
Chen, Shin-Chang
;
交大名義發表
;
National Chiao Tung University
In this paper, we propose an application of robust watermarking with the aid of EXIF metadata in digital images. Application for robust watermarking is one of the major branches in digital rights management (DRM) systems. Furthermore, implementation schemes for robust watermarking generally alter selected pixels in the spatial domain, or corresponding coefficients in the transform domain, to accomplish the embedding process. We consider not only the pixels or coefficients in the images, but we also employ the EXIF metadata, which serves as the role of watermark, to further protect the copyrights. Taking the manufacturer, camera model, date and time stamp, and some other information in the EXIF metadata as the watermark information, conventional watermarking techniques can be applied to ordinary pictures taken by ourselves, and watermarked images with good quality can be produced. Even when the marked image has been intentionally modified, the original EXIF with selected information can be recovered from the watermark extraction process. Simulation results present the effectiveness of such an implementation.
Copyright Protection with EXIF Metadata and Error Control Codes
(2008)
Huang, Hsiang-Cheh
;
Fang, Wai-Chi
;
Chen, Shin-Chang
;
交大名義發表
;
National Chiao Tung University
In this paper, we propose a practical scheme for copyright protection of images with the aid of EXIF metadata and error control codes. Application for robust watermarking is one of the major branches in digital rights management (DRM) systems and digital forensics. By use of robust watermarking, it generally alters selected coefficients in the transform domain to accomplish the embedding process. We consider not only the image contents itself, but we also employ the EXIF metadata, which serves as the role of watermark, to be integrated into our scheme. Moreover; for enhancing the copyright protection capability, channel coding is employed Taking the manufacturer, camera model, date and time stamp, and some other information in the EXIF metadata into account, conventional watermarking techniques can be applied to ordinary pictures taken by ourselves, and watermarked images with good quality can be produced. Even when the marked image has been intentionally modified, the original EXIF with selected information can mostly be recovered from the channel decoding process. Simulation results present the effectiveness of such an implementation.
Design of heart rate variability processor for portable 3-lead ECG monitoring system-on-chip
(2013-04-01)
Fang, Wai-Chi
;
Huang, Hsiang-Cheh
;
Tseng, Shao-Yen
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
The worldwide population of people over the age of 65 has been predicted to more than double from 1990 to 2025. Therefore, ubiquitous health-care systems have become an important topic of research in recent years. In this paper, an integrated system for portable electrocardiography (ECG) monitoring, with an on-board processor for time-frequency analysis of heart rate variability (HRV), is presented. The main function of proposed system comprises three parts, namely, an analog-to-digital converter (ADC) controller, an HRV processor, and a lossless compression engine. At the beginning, ECG data acquired from front-end circuits through the ADC controller is passed through the HRV processor for analysis. Next, the HRV processor performs real-time analysis of time-frequency HRV using the Lomb periodogram and a sliding window configuration. The Lomb periodogram is suited for spectral analysis of unevenly sampled data and has been applied to time-frequency analysis of HRV in the proposed system. Finally, the ECG data are compressed by 2.5 times using the lossless compression engine before output using universal asynchronous receiver/transmitter (UART). Bluetooth is employed to transmit analyzed HRV data and raw ECG data to a remote station for display or further analysis. The integrated ECG health-care system design proposed has been implemented using UMC 90 nm CMOS technology. (C) 2012 Elsevier Ltd. All rights reserved.
Genetic fingerprinting for copyright protection of multicast media
(2009-02-01)
Huang, Hsiang-Cheh
;
Chen, Yueh-Hong
;
交大名義發表
;
National Chiao Tung University
Generally speaking, comparing to the unicast or broadcast methods, it is more efficient to transmit multimedia data via the multicast method to massive users. However, the ease of delivery of multimedia data may cause the copyright of such multimedia to be easily infringed upon, and the fingerprinting scheme is one of effective means for conquering this problem. Fingerprint embedding process often generates the multimedia contents into many different versions, which have to be transmitted via the unicast method. In this paper, we propose a new genetic fingerprinting scheme for copyright protection of multicast video. In this method, the encryption and decryption keys, which aim at scrambling and descrambling multimedia contents, are first produced with genetic algorithms. Next, multimedia data are then encrypted and multicast to all users. At the same time, a secure channel is employed to unicast a designated decryption key to each user. When a user deploys the designated key to decrypt the received data, a corresponding fingerprint would be embedded into the contents. Once upon the reception of the fingerprinted multimedia content, the embedded fingerprint can be extracted shortly, and the copyright can be confirmed and assured. Experimental results demonstrate that the proposed method can transmit multimedia data to clients effectively and cause only a slight degradation in perceptual quality.
Histogram-Based Reversible Data Hiding with Quadtree Concepts
(2010)
Huang, Hsiang-Cheh
;
Wang, Ting-Hsuan
;
Fang, Wai-Chi
;
交大名義發表
;
National Chiao Tung University
Reversible data hiding has attracted much attention in researches during the past few years. With its characteristics of reversibility, the algorithm is required to fulfill the goals that at the encoder, the secret information needs to be embedded into the original image by some means, and at the decoder, both the secret information and the original image are required to be correctly extracted and recovered, and they should be identical to their embedding counterparts. Under the requirement of reversibility, for evaluating the performance of the algorithm, the output image quality, called imperceptibility, and the number of bits for embedding, called capacity, are the two important factors to access the effectiveness of the algorithm. Here we take the concepts of quadtree decomposition into consideration to watch the characteristics of the original content. And we propose a reversible data hiding algorithm that has the ability to reside more capacity than conventional algorithm, with similar output image quality after embedding, and comparable side information produced.
Intelligent multimedia data hiding techniques and applications
(2008)
Huang, Hsiang-Cheh
;
Fang, Wai-Chi
;
交大名義發表
;
National Chiao Tung University
In this paper, we present the intelligent multimedia data hiding techniques and their possible applications. An introduction on intelligent multimedia data hiding is described which covers backgrounds, recent advances, methodologies, and implementations. The histogram-based reversible data hiding technique is then presented with simulation results and also illustrated by using actual implementations.
Layered access control schemes on watermarked scalable media
(2007-12-01)
Chang, Feng-Cheng
;
Hang, Hsueh-Ming
;
Huang, Hsiang-Cheh
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Intellectual Property (IP) protection is a critical element in multimedia transmission and delivery systems. Conventional IP protection on multimedia data can be categorized into encryption and watermarking. In this paper, a structure to perform layered access control on scalable media by combining encryption and robust watermarking is proposed, implemented, and verified. By taking advantages of the nature of both encryption and watermarking, copyrights of multimedia contents can be well protected and at the same time, multiple-grade services can be provided. In the summated examples, we assume a scalable transmission scheme over the broadcasting environment and use it to test the effectiveness of proposed method. When the embedded watermark is extracted with high confidence, the key to decrypt the next layer can be perfectly recovered. Then, the media contents are reconstructed and the copyrights are assured. The application examples also demonstrate the practicality of the proposed system.
Lossless Data Hiding with Multi-Round Difference Prediction
(2014-01-01)
Huang, Hsiang-Cheh
;
Lin, Chuan-Chang
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Chen, Yueh-Hong
;
Fang, Wai-Chi
;
電機工程學系
Lossless data hiding belongs to one major branch in information security researches. The major goal is to retain the lossless property of proposed algorithm, meaning that original image and embedded secret should be perfectly recovered at decoder. Based on the multi-round prediction of differences between original and marked images, enhanced amount of capacity can be obtained while retaining the acceptable quality of output image. Simulation results have demonstrated the better performances over relating methods in literature.
Metadata-based image watermarking for copyright protection
(2010-04-01)
Huang, Hsiang-Cheh
;
Fang, Wai-Chi
;
交大名義發表
;
National Chiao Tung University
In this paper, we propose a practical application for copyright protection of images with watermarking. The EXIF metadata of images and error-control codes are integrated into our algorithm and corresponding applications. Application for robust watermarking is one of the major branches in digital rights management (DRM) systems and digital forensics. Here, we focus on the copyright protection for images taken by ordinary cameras. By use of robust watermarking, it generally alters selected coefficients of the contents to accomplish the embedding process. Should the received image be in question, the watermark embedded beforehand can be extracted to indicate the copyright owner of such an image. We consider not only the image contents itself, but we also employ the EXIF metadata, which serves as the role of watermark, to be integrated into our scheme to make copyright protection possible. Moreover, for enhancing the performance for copyright protection, channel coding is employed and better protection capability can be expected. Taking the manufacturer, camera model, date and time stamp, and other important information in the EXIF metadata into account, conventional watermarking techniques can be applied to ordinary pictures taken by ourselves, and watermarked images with good quality can be produced. Even when the marked image has been intentionally modified, the original EXIF with selected information can mostly be recovered from the channel decoding process. Simulation results present the effectiveness of such an implementation. (C) 2009 Elsevier B.V. All rights reserved.
Metadata-based image watermarking for copyright protection
(2010-04-01)
Huang, Hsiang-Cheh
;
Fang, Wai-Chi
;
交大名義發表
;
National Chiao Tung University
In this paper, we propose a practical application for copyright protection of images with watermarking. The EXIF metadata of images and error-control codes are integrated into our algorithm and corresponding applications. Application for robust watermarking is one of the major branches in digital rights management (DRM) systems and digital forensics. Here, we focus on the copyright protection for images taken by ordinary cameras. By use of robust watermarking, it generally alters selected coefficients of the contents to accomplish the embedding process. Should the received image be in question, the watermark embedded beforehand can be extracted to indicate the copyright owner of such an image. We consider not only the image contents itself, but we also employ the EXIF metadata, which serves as the role of watermark, to be integrated into our scheme to make copyright protection possible. Moreover, for enhancing the performance for copyright protection, channel coding is employed and better protection capability can be expected. Taking the manufacturer, camera model, date and time stamp, and other important information in the EXIF metadata into account, conventional watermarking techniques can be applied to ordinary pictures taken by ourselves, and watermarked images with good quality can be produced. Even when the marked image has been intentionally modified, the original EXIF with selected information can mostly be recovered from the channel decoding process. Simulation results present the effectiveness of such an implementation. (C) 2009 Elsevier B.V. All rights reserved.
Multicast video fingerprinting scheme with genetic algorithm
(2008)
Huang, Hsiang-Cheh
;
Chen, Yueh-Hong
;
交大名義發表
;
National Chiao Tung University
Comparing to the unicast or broadcast methods, it is more efficient to transmit video data via the multicast method to massive users. However, the ease of delivery of video data may cause a problem to copyright protection, and the fingerprinting scheme is one of effective means for conquering this problem. Fingerprint embedding process often generates the multimedia contents into many different versions, which have to be transmitted via the unicast method. In this paper, we propose a new fingerprinting scheme with the aid of genetic algorithms for copyright protection of multicast video. Experimental results demonstrate that the proposed method can transmit multimedia data to clients effectively and cause only a slight degradation in perceptual quality.
Privacy Protection and Authentication for Medical Images with Record-Based Watermarking
(2009)
Huang, Hsiang-Cheh
;
Fang, Wai-Chi
;
Chen, Shin-Chang
;
交大名義發表
;
National Chiao Tung University
In this paper, we propose a practical scheme for privacy protection and authentication of medical images with the aid of EXIF metadata and associated records of the patients. By using watermarking, the goals mentioned above can be reached. Application for robust watermarking is one of the major branches in digital rights management (DRM) systems. With robust watermarking, it generally alters selected coefficients in the transform domain to accomplish the embedding process. We consider not only the image contents itself, but we also employ the EXIF metadata, which contains the patients\' records and serves as the role of watermark, to be integrated into our scheme. By doing so, the false negative probability for obtaining the record can be reduced. Moreover, taking the information that the medical doctor recorded in the EXIF metadata into account, conventional watermarking techniques can be applied to medical images, and watermarked images with good quality can be produced. Even when the marked image has been intentionally modified, the original EXIF with selected information can mostly be recovered from the decoding process. Simulation results present the effectiveness of such an implementation.
Reversible Data Hiding Using Histogram-Based Difference Expansion
(2009)
Huang, Hsiang-Cheh
;
Fang, Wai-Chi
;
Tsai, I-Tse
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Reversible data hiding has attracted more and more attention in both researches and applications. It can be categorized into two branches, one is histogram-based scheme, and the other is performed by adjusting the difference between adjacent pixel pairs. We consider the :advantages of both methods and integrate them altogether., and propose the histogram-based difference expansion scheme for reversible data hiding. Simulation results demonstrate the superiority and ease of implementation of the proposed algorithm.
Reversible Data Hiding with Enhanced Difference Alteration for Progressively Transmitted Images
(2013)
Huang, Hsiang-Cheh
;
Wang, Ting-Hsuan
;
Chen, Yueh-Hong
;
Fang, Wai-Chi
;
電子工程學系及電子研究所
Progressive transmission of multimedia is an important application in multimedia communications. We employ reversible data hiding for protecting the copyright of progressively transmitted images. We consider carefully altering the luminance differences between base and enhancement layers in progressive transmission, and obtain similar qualities of output images with enhanced amount of capacity. Simulation results demonstrate the superiority over existing schemes.
Reversible Data Hiding with Histogram-Based Difference Expansion for QR Code Applications
(2011-05-01)
Huang, Hsiang-Cheh
;
Chang, Feng-Cheng
;
Fang, Wai-Chi
;
電機工程學系
;
Department of Electrical and Computer Engineering
In this paper, we propose a new algorithm in reversible data hiding, with the application associated with the quick response (QR) codes. QR codes are random patterns, which can be commonly observed on the corner of posters or webpages. The goal of QR codes aims at convenience-oriented applications for mobile phone users. People can use the mobile phone cameras to capture QR code at the corner of web page, and then the hyperlink corresponding to the QR code can be accessed instantly. Since QR code looks like random noise and it occupies a corner of the original image, its existence can greatly reduce the value of the original content. Thus, how to retain the value of original image, while keeping the capability for the instant access for webpages, would be the major concern of this paper. With the aid of our reversible data hiding technique, the QR codes can be hidden into the original image, and considerable increase in embedding capacity can be expected. Next, we propose a scheme such that when the image containing the QR code is browsed, the hyperlink corresponding to the QR code is accessed first. Then, the QR code could get vanished and the original image would be recovered to retain the information conveyed therein. Simulation results demonstrate the applicability of the proposed algorithm(1).