Taiwan Hospitality and Tourism College

Taiwan, Taiwan

Taiwan Hospitality and Tourism College

Taiwan, Taiwan
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Hsu F.-M.,National Dong Hwa University | Lin Y.-T.,National Dong Hwa University | Ho T.-K.,Taiwan Hospitality and Tourism College
Expert Systems with Applications | Year: 2012

Selecting tourist attractions and collecting related site information is one of the most crucial activities for a tourist when making decisions for a trip. Although various recommendation systems have been discussed over the last decade, rarely do such systems take individual tourist preference information into consideration. Based on the Engel-Blackwell-Miniard (EBM) model, this study used data published by the Tourism Bureau of Taiwan to develop a decision support system for tourist attractions. The probability of a tourist attraction appealing to a particular tourist is calculated utilizing a Bayesian network, and the accuracy of the prediction is validated by a ROC curve test. Finally, recommended routes and tourist attractions are presented through an interactive user interface using Google Maps. This study confirms that by combining the EBM model with a Bayesian network to propose a decision support system called the Intelligent Tourist Attractions System (ITAS). It has demonstrated good prediction of tourism attractions and provides useful map information to tourists. © 2011 Elsevier Ltd. All rights reserved.


Chou C.-H.,Tatung University | Liu K.-C.,Taiwan Hospitality and Tourism College
IEEE Transactions on Image Processing | Year: 2010

Transparency and robustness are two conflicting requirements demanded by digital image watermarking for copyright protection and many other purposes. A feasible way to simultaneously satisfy the two conflicting requirements is to embed high-strength watermark signals in the host signals that can accommodate the distortion due to watermark insertion as part of perceptual redundancy. The search of distortion-tolerable host signals for watermark insertion and the determination of watermark strength are, hence, crucial to the realization of a transparent yet robust watermark. This paper presents a color image watermarking scheme that hides watermark signals in most distortion-tolerable signals within three color channels of the host image without resulting in perceivable distortion. The distortion-tolerable host signals or the signals that possess high perceptual redundancy are sought in the wavelet domain for watermark insertion. A visual model based upon the CIEDE2000 color difference equation is used to measure the perceptual redundancy inherent in each wavelet coefficient of the host image. By means of quantization index modulation, binary watermark signals are embedded in qualified wavelet coefficients. To reinforce the robustness, the watermark signals are repeated and permuted before embedding, and restored by the majority-vote decision making process in watermark extraction. Original images are not required in watermark extraction. Only a small amount of information including locations of qualified coefficients and the data associated with coefficient quantization is needed for watermark extraction. Experimental results show that the embedded watermark is transparent and quite robust in face of various attacks such as cropping, low-pass filtering, scaling, media filtering, white-noise addition as well as the JPEG and JPEG2000 coding at high compression ratios. © 2006 IEEE.


Liu K.-C.,Taiwan Hospitality and Tourism College
AEU - International Journal of Electronics and Communications | Year: 2010

In this paper, a wavelet-based watermarking scheme for color images is proposed. The watermarking scheme is based on the design of a color visual model that is the modification of a perceptual model used in the image coding of gray scale images. The model is to estimate the noise detection threshold of each wavelet coefficient in luminance and chrominance components of color images in order to satisfy transparency and robustness required by the color image watermarking technique. The noise detection thresholds of coefficients in each color component are derived in a locally adaptive fashion based on the wavelet decomposition, by which perceptually significant coefficients are selected and a perceptually lossless quantization matrix is constructed for embedding watermarks. Performance in terms of robustness and transparency is obtained by embedding the maximum strength watermark while maintaining the perceptually lossless quality of the watermarked color image. Simulation results show that the proposed scheme is more robust than the existing scheme while retaining the watermark transparency. © 2008 Elsevier GmbH. All rights reserved.


Tsai C.-H.,Taiwan Hospitality and Tourism College
Journal of Convergence Information Technology | Year: 2011

The Taiwan government is aggressively promoting projects, such as the so-called "Double Tourist Plan", encouraging the development of the sightseeing business. Operators in the tourist industry naturally want to construct facilities at or near scenic areas, which in Taiwan are often adjacent to the mountains or the ocean. Unfortunately these are the areas that most often experience natural disasters. This has a negative impact on the tourism industry. The centralization of touring regions, leading to the gathering of large numbers of tourists during the holiday seasons places people in danger. In other words tourism operators in the Taiwan region face a high risk of natural disasters. This paper describes how risk-based risk control allocation model works. We begin by discussing the economic rational for allocating risk control in a Tourism Industry. Considering a probability model for risk control decision making under uncertainty and risk, we propose a model involving stochastic total loss amount constraints with respect to various tolerable default level. Our main objective is to develop a method that would allow shaping the risk associated with risk control outcomes. The direct and indirect losses caused by the simulated disasters can be estimated using the engineering and financial analysis model. Basing on the model, we can generate exceeding probability (EP) curve and then calculate how much loss will be ceased or transferred to other entities, if somehow spending budgets on risk control actions. Optimal natural disasters risk control arrangement with probabilistic formulation is explained in this paper. Results from the proposed formulations are compared in case studies.


Hsu F.-M.,National Dong Hwa University | Lu L.-P.,National Dong Hwa University | Lin C.-M.,National Dong Hwa University | Lin C.-M.,Taiwan Hospitality and Tourism College
Expert Systems with Applications | Year: 2012

The segmentation of customers is crucial for an organization wishing to develop appropriate promotion strategies for different clusters. Clustering customers provides an in-depth understanding of their behavior. However, previous studies have paid little attention to the similarity of different items in transaction. Lack of categories and concept levels of items, results from item-based segmentation methods are not as good as expected. Through employing a concept hierarchy of items, this study proposes a segmentation methodology to identify similarities between customers. First, the dissimilarity between transaction sequences is defined. Second, we adopt hierarchical clustering method to segment customers by their transaction data with concept hierarchy of consumed items. After segmentation, three cluster validation indices are used for optimizing the number of clusters of customers. Through the compassion of normalized index, the segmentation method proposed by this study rendered better results than other traditional methods. © 2011 Elsevier Ltd. All rights reserved.


Liu K.-C.,Taiwan Hospitality and Tourism College
Proceedings - 2011 4th International Conference on Information Management, Innovation Management and Industrial Engineering, ICIII 2011 | Year: 2011

In this paper, a perceptual JPEG2000 compliant coder based on the just noticeable distortion (JND) for the color images is presented. Since the human visual perception to color visual signals has a limited sensitivity, any change below the visibility threshold cannot be detected by human eyes. We therefore propose a new color JND estimator to incorporate into the design of the perceptual JPEG2000 coder. Without introducing the perceptual distortion into input signals, the dynamic range of input signals in each color component of the color image is reduced to increase the compression performance. In the simulation results, the bit rate required by the perceptual JPEG2000 compliant coder is lower than that required by the standard JPEG2000 coder at the perceptually lossless visual quality of the reconstructed color image. © 2011 IEEE.


Tsai C.-H.,Taiwan Hospitality and Tourism College
Journal of Computational Information Systems | Year: 2011

With the advent of the two-day weekend system in Taiwan, people's demand for leisure activities has risen sharply, and the leisure industry development in Taiwan has experienced a boom in recent years. Along with the popularization of the Internet, the network and leisure industries have become more closely interrelated. In the future, the cable network navigation mode of the fixed site will be unable to meet a wide range of leisure industry considerations, such as action, convenience, timeliness, and economy. Based on this situation, this research aimed to understand the planning mode of a navigation system for a large region resort, and the feasibility of its construction. In addition, the aim was to construct an integrated resort mobile navigation system with plentiful information on multimedia voice and spatial positioning by making use of the existing network multimedia and space information technology as the main development tools. At the same time, the study attempted to test and verify the guide system in a systematic and practical way, taking Promised Land Resort & Lagoon in Taiwan as an example, in the hope of presenting a resort navigation mechanism characterized by utility, vividness, real-time and multiple functions as well as reaping the benefits of promoted service quality and downsized human navigation. Copyright © 2011 Binary Information Press.


Liu K.-C.,Taiwan Hospitality and Tourism College
Journal of Information and Computational Science | Year: 2011

Since the human visual perception to color visual signals has a limited sensitivity, any change below the visibility threshold cannot be detected by human eyes. In this paper, a just noticeable distortion (JND) estimator for color images is proposed to incorporate into the design of the quantization stage in the color image compression scheme. The color JND estimator is carried out in the wavelet domain to present good estimates to the available amount visual masking for each coefficient in three color components. The estimated JND value of each coefficient in each color component of the color image is used to adapt the corresponding quantization stepsize for higher performance without introducing the perceptual distortion into quantization error signals. In the simulation results, the bit rate required by the compression scheme is lower than the existing Watson's method at the consistent visual quality. Copyright © 2011 Binary Information Press.


Liu K.-C.,Taiwan Hospitality and Tourism College
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

In this paper, we design a DCT-based model for estimating spatio-temporal just noticeable distortion (JND) profiles of color image/video. Based on a mathematical model of measuring the base detection threshold for each DCT coefficient in the color component of color images, the masking adjustments for luminance component and chrominance components are utilized for estimating the spatial JND profiles. The above spatial JND profiles are extended to video signals by incorporating the proposed block-based temporal masking adjustment mainly considering local temporal statistics in luminance component. The model is verified by designing a subjective viewing test of evaluating the visual quality under the specified viewing condition. In the experiment, the test video is contaminated by the estimated JND profiles in the DCT domain and is compared with the original video. The simulation results show that the JNDcontaminated color video has nearly perceptual lossless visual quality and the model is able to estimate the JND profiles inherent in color videos. © 2014 Copyright SPIE.


Liu K.-C.,Taiwan Hospitality and Tourism College
IET Image Processing | Year: 2012

The rapid development of the internet allows digital media being easily delivered, copied and even tampered. The watermarking issue has thus focused mainly on the medium of authentication. In this study, an efficient self-embedding watermarking scheme for colour image authentication is proposed. The scheme is designed to achieve tamper proofing and high-quality recovery. The scheme is efficient because the validity of image blocks is simply proofed by using a dual-option parity-check method and morphological operations. The former is used to generate authentication information for obtaining better results of tamper proofing and the latter is used to further improve the neighbouring connectivity of the proofing results. To achieve high-quality recovery of the tampered image, the feature information of the host colour image and its corresponding block-edge-pattern information are properly organised to embed into three colour components of the host colour image. Meanwhile, the embedding information is appropriately distributed over luminance and chrominance components of the colour image in the YCbCr colour space such that the quality of the watermarked image can be better obtained. The simulation results show that the proposed watermarking scheme can effectively proof the tempered region with high detection rate and can restore the tempered region with high quality. © 2012 The Institution of Engineering and Technology.

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