• 수완나부미
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• 제15권2호
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• pp.91-129
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• 2023

This paper reports the findings of a multimodal study conducted on 10 travel blog posts about Vietnam by seven British professional travel bloggers. The study takes a sociolinguistic view to tourism by seeing travel blogs as a source for linguistic and other semiotic materials while considering language as situated practice for the social construction of fundamental categories such as "human," "society," and "nation." It borrows concepts from Halliday's Systemic Functional Linguistics for interpersonal metafunction to develop an analytical framework to study how the co-occurrence of text and still images in these travel blog posts formulated the portrayal of Vietnam as a tourism destination and indicated the main sociolinguistic features of the blogs. The analysis of appreciation values and interactive qualities encoded in evaluative adjectives and still images show that Vietnam is generally portrayed as a country of identity and diversity. It provides tourists with positive experiences in terms of places of interest, food and local lifestyles and is cost-competitive. Strangerhood and authenticity are two outstanding sociolinguistic features exhibited in these travel blog posts. The findings of this study also underline the co-contribution of the linguistic sign, in this case evaluative adjectives, and the visual sign, in this case still images, as interpersonal meaning-making resources. To portray Vietnam, still images served as integral elements to evidence the credibility of verbal narrations. To unveil sociolinguistic characteristics of travel blogs, still images supported the linguistic realizations of authenticity and strangerhood on the posts, and in some case delivered an even stronger message than words. Not only does the study present a source of feedback from international travelers to tourism practice in Vietnam, but it also provides insights into multimodal analysis of tourism discourse which remains an under-researched area in Vietnam.

• Asia Marketing Journal
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• 제24권3호
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• pp.96-108
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• 2022

This study investigates how affects elicited by visual images in print ads are integrated to form a liking for the ads. Assuming a sequential rather than simultaneous processing of still-cut images, we adopt the 'think-aloud' method to capture consumers' spontaneous responses to visual images. We hypothesize that not only would consumers show mixed affects toward a still-cut visual image but that they would also integrate their serial affects heuristically rather than simply averaging the affects as suggested by the compensatory hypothesis. By comparing the effects of two contradictory affect integration hypotheses (i.e., peak-affect and mood-maintenance) with compensatory integration, using a single regression model, we found that peak-negative along with mood maintenance integration of serial affects for a print ad works best in the formation of ad liking. The results also support our initial premise that people can have mixed valence even toward a still-cut ad.

• 전자공학회논문지B
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• 제29B권11호
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• pp.93-101
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• 1992

HVS based transform coding techniques for still images take the lowest spatial frequency and luminance contrast sensitivity as the most crucial factors in determining the image quality perceived by human eye. Only the frequency weighting has been main issue. The proposed Weighted Discrete Cosine Transform (WDCT) has the lowest frequency of about 4 [cyc/deg] in 8$\times$8 subblock with the contrast-weighted DC coefficient. The error criteria have been rederived to adapt the contrast weighting for performance evaluation. The proposed scheme has produced higher quality images compared to the unweighted and other schemes.

• 디지털콘텐츠학회 논문지
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• 제11권3호
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• pp.393-398
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• 2010

핸드폰, MP3 플레이어 등 간단한 방법으로 디지털 정지영상을 획득할 수 있는 복합형 소형기기는 이미 대중화되었으며, 보안 및 기록용 기기에도 정지영상의 응용은 보편화되어 가고 있다. 정지영상은 개인 소장용 저장소 또는 다양한 웹서비스가 제공하는 대용량 저장소를 통해 관리 또는 공유가 되고 있으며, 그 용량은 급격하게 늘어가고 있다. 각각의 이미지는 주로 사용자가 파일이름 또는 식별자를 임의로 부여 하거나, 정지영상을 생성하는 기기가 제공하는 특정 명명체계에 따라 자동적으로 부여하는 식별자를 가지게 된다. 이러한 식별자는 데이터베이스에서 특정 정지영상을 식별할 수 있는 보편적 방법으로 사용하고 있다. 하지만, 임의적 방법 또는 자동적 방법으로 부여되는 값들은 변경 또는 소실될 가능성이 있어, 정지영상 검색과 관리에 차질을 가져올 뿐 아니라 동일 정지영상 검색을 위해서는 비용이 높은 방법을 사용하여야 한다. 본 논문에서는 정지영상 자체 속성에서 변하지 않는 값을 추출하여 이를 정지 영상 데이터베이스의 식별자로 활용할 수 있는 방법을 제안 한다.

• 반도체디스플레이기술학회지
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• 제16권1호
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• pp.6-10
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• 2017

Recent enhancement in the still image acquisition devices has been widely perpetrated into the daily life of the common people. Due to this trend, the voluminous still images, that are produced and shared in the personal or the massive storage, need to controlled with effective and efficient management. The human-devised or system-generated still image identifiers used for the identification of the images are at risk in the situation of unexpected changing or eliminating of the identifiers. In this paper, we propose a parallel processing based method for still image identifier generation by utilizing the still image internal features.

• 제어로봇시스템학회논문지
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• 제8권6호
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• pp.462-467
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• 2002

A new approach for reducing the blocking artifact is proposed in this paper. This method can be applied to conventional transform coding, without introducing additional information or significant blurring. Main drawbacks of the Discrete Cosine Transform(DCT) are visible block boundaries due to coarse quantization of the coefficients. Therefore, restoration techniques result in unnecessary blurring of the image. The proposed deblocking algorithm is based on the heuristic approach for edge detection. All edges of the standard still images are categorized, and the best edges are selected. Several images are used fer experiments, and several other previous algorithms are compared with the proposed approach. The results show that the proposed algorithm works better than those of other previous researches. This algorithm can be used for JPEG, MPEG, and H.261 standard images.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 제14회 신호처리 합동 학술대회 논문집
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• pp.223-226
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• 2001

In this paper, we propose a robust and fragile watermarking technique for tamper proofing of still images. Robust watermarks are embedded by quantization with a robust quantization step-size, and it is imperceptible value for human visual system. Fragile watermarks are embedded by thresholding and quantization with EW(Embedded Zerotree Wavelet) algorithm. The proposed method enables us to distinguish malicious change from non-malicious change. Futhermore this technique enables us to find tampering regions and degrees.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 ITC-CSCC -2
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• pp.861-864
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• 2000

This paper aims to establish fundamentals of measuring and evaluating the performance of water-marking systems. We first present the general model of a watermarking method for still images. Based on this model, we propose a statistical method of measuring the performance and robustness of the watermarking system. Then, the DCT-based watermarking system is analyzed and its performance is evaluated by using the proposed method.

• Agribusiness and Information Management
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• 제7권1호
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• pp.10-20
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• 2015

This study aims to compare and analyze the differences of emotional responses between two types of e-magazines published - one with cinemagraph images and another with general still images. To conduct this study, a total of nine pages were prepared with different contents according to each theme and samples of e-magazine with a total of nineteen sections of images were exposed to a total of thirty persons of subjects. Fifteen persons were assigned to the experimental group viewing the cinemagraph images, and other fifteen persons were assigned to the control group viewing the general still images. As a result of the experiment, the emotional responses of the experimental group and the control group were significantly different. Twenty-eight items of positive emotional responses out of forty-two items of the emotional responses were more found in the experimental group, and fourteen items of negative emotional responses affected the control group more. In the experimental group where the differences in the mean value and significant differences were found, negative emotional responses were not examined but fourteen positive emotional response items such as Loveliness, Merriness, Freshness, Activeness, Attractiveness, Powerfulness, Heartwarming, Joyfulness, Interesting, Confidence, Excitement, Cheerfulness, Humorousness, and Amazement were found; in the control group, positive emotional responses were not found but three items of negative emotional responses such as Ambiguousness, Stuffiness, and Boredom were found.

• 한국통신학회논문지
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• 제30권12C호
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• pp.1214-1221
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• 2005

본 논문에서는 DCT 평면에서 modulation transfer function (MTF)을 사용한 정지영상 워터마킹 방법을 제안하였다. 정지영상에 삽입된 워터마크의 가시성을 줄이기 위하여 인간의 시각적 특성을 나타내는 MTF를 사용하였다. 제안한 워터마킹 방법이 lowpass filtering 및 cropping 등의 공격에 강인한 특성을 나타내었다. 공간평면과 DCT 평면 사이의 에너지 상관관계를 이용하여 DCT 평면에서 삽입될 워터마크의 길이와 공간 평면에서 원하는 peak signal to noise ratio (PSNR)가 주어졌을 때 DCT 평면에서 워터마크 weighting factor를 구하는 식을 유도하였으며, 원하는 PSNR과 공간평면 및 DCT 평면에서 계산된 PSNR이 본 실험에서 사용한 7가지 영상에 대하여 최대 0.07dB이내로 오차를 나타내었다.