• 센서학회지
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• 제27권3호
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• pp.160-164
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• 2018

In this paper, a wide dynamic range complementary metal-oxide-semiconductor (CMOS) image sensor with the adjustable sensitivity by using cascode metal-oxide-semiconductor field-effect transistor (MOSFET) and inverter is proposed. The characteristics of the CMOS image sensor were analyzed through experimental results. The proposed active pixel sensor consists of eight transistors operated under various light intensity conditions. The cascode MOSFET is operated as the constant current source. The current generated from the cascode MOSFET varies with the light intensity. The proposed CMOS image sensor has wide dynamic range under the high illumination owing to logarithmic response to the light intensity. In the proposed active pixel sensor, a CMOS inverter is added. The role of the CMOS inverter is to determine either the conventional mode or the wide dynamic range mode. The cascode MOSFET let the current flow the current if the CMOS inverter is turned on. The number of pixels is $140(H){\times}180(V)$ and the CMOS image sensor architecture is composed of a pixel array, multiplexer (MUX), shift registers, and biasing circuits. The sensor was fabricated using $0.35{\mu}m$ 2-poly 4-metal CMOS standard process.

• 센서학회지
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• 제29권2호
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• pp.82-88
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• 2020

In this paper, we propose a complementary metal-oxide semiconductor (CMOS) binary image sensor with a gate/body-tied (GBT) p-channel metal-oxide-semiconductor field-effect transistor (PMOSFET)-type photodetector using a double-tail comparator for high-speed and low-power operations. The GBT photodetector is based on a PMOSFET tied with a floating gate (n+ polysilicon) and a body that amplifies the photocurrent generated by incident light. A double-tail comparator compares an input signal with a reference voltage and returns the output signal as either 0 or 1. The signal processing speed and power consumption of a double-tail comparator are superior over those of conventional comparator. Further, the use of a double-sampling circuit reduces the standard deviation of the output voltages. Therefore, the proposed CMOS binary image sensor using a double-tail comparator might have advantages, such as low power consumption and high signal processing speed. The proposed CMOS binary image sensor is designed and simulated using the standard 0.18 ㎛ CMOS process.

• 대한원격탐사학회지
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• 제33권6_3호
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• pp.1171-1177
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• 2017

본 특별호는 최근 수행되고 있는 다목적실용위성 영상처리 및 활용연구에 대해서 소개하고 있으며, 사설에서는 다목적실용위성 개발 현황과 국가 위성영상 활용정책을 살펴보고 특별호에 소개된 논문의 의의에 대해서 논하였다. 지속적인 위성개발을 통해 활용 가능한 위성영상 자원과 활용정책은 체계적으로 마련되어 있는 것으로 판단된다. 따라서 본 사설에서 소개된 산림 및 도시 변화탐지, 영상보정 기술 등과 같이 다양한 자료처리 및 활용기술 개발이 지속적으로 이루어진다면 국가 위성영상의 활용 경쟁력은 더욱 강화될 것으로 기대된다.

• 센서학회지
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• 제30권1호
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• pp.61-65
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• 2021

In this study, we propose a 2500 frame per second (fps) high-speed binary complementary metal oxide semiconductor (CMOS) image sensor using a gate/body-tied (GBT) p-channel metal oxide semiconductor field effect transistor-type high-speed photodetector. The GBT photodetector generates a photocurrent that is several hundred times larger than that of a conventional N+/P-substrate photodetector. By implementing an additional binary operation for the GBT photodetector with such high-sensitivity characteristics, a high-speed operation of approximately 2500 fps was confirmed through the output image. The circuit for binary operation was designed with a comparator and 1-bit memory. Therefore, the proposed binary CMOS image sensor does not require an additional analog-to-digital converter (ADC). The proposed 2500 fps high-speed operation binary CMOS image sensor was fabricated and measured using standard CMOS process.

• 한국의류학회지
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• 제30권1호
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• pp.137-145
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• 2006

This study offers the basis of the image making in categorizing one's personal style and investigation its features and image differences, according to the image making on the subject of Korean female entertainers. The image factors are Activeness, Attractiveness, Extroversions and Intimacy that has occupied by $56.34\%$ out of total. The type of the personal style of Korean female entertainers are classified into five groups and nine small groups that refer to Elegant style(Noble, Sophisticated), Natural style, Tough style, Romantic style(Cute, Delicate), Sexy style(Vivid, Cool, Healthy). The image according to the type of personal style has presented meaningful differences in all composed factors, in particular, the most significant differences are shown in the factors of Attractiveness and Activeness. The axis of the personal positioning far Korean female entertainers are divided into Elegant-Active, Cool-Warm, Weak-Tough. Artificial -Natural.

• 충청수학회지
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• 제25권2호
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• pp.367-377
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• 2012

The goal of the image restoration is to find a good approximation of the original image for the degraded image, the blurring matrix, and the statistics of the noise vector given. Fast truncated Lagrange (FTL) method has been proposed by G. Landi as a image restoration method for large-scale ill-conditioned BTTB linear systems([3]). We implemented FTL method for the image restoration problem with reflective boundary condition which gives better reconstructions of the unknown, the true image.

• 유통과학연구
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• 제17권10호
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• pp.49-59
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• 2019

Purpose - This study aims to verify the effect of sports sponsorship recognition on corporate image and the relationship between image and identification, corporate image and purchasing intention, brand identification and purchasing intention Research design, data, and methodology - To carry out the purpose of this study, a set of data was collected from 320 surveys and 305 of them were used. Statistic programs, SPSS 18.0 and AMOS 20.0, were used to analyze the data. Results - It was found that emotional sports sponsorship recognition and social sponsorship sports sponsorship recognition had positive effects on corporate image and brand identification. Corporate image also had a positive effect on brand identification. Besides, it was analyzed that corporate image and brand identification had positive effects on purchasing intention. Conclusions - The results show that sports sponsorship recognition can influence brand identification and purchasing intention, and contribute to the enhancement of corporate image. Since brand personality that matches the self-image of the targeted customer will have a more positive effect on the relationship with the consumer, marketing activities should be carried out so that the brand image can be identified with the company image of sports sponsorship activities.

• 한국멀티미디어학회논문지
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• 제12권6호
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• pp.815-823
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• 2009

Most of existing watermarking schemes insert and extract a watermark, focusing on the visual conservation of an original image. However, existing watermarking schemes could be difficult for a watermark detection in case of various distortion caused by display-capture devices. Therefore, we propose a new display-capture based mobile watermarking scheme. The proposed watermarking scheme is a new concept for embedding a watermark, which uses the generated image instead of a given original image. For effective watermark decoding, we also present a method for detecting the background image whose error bit can not be corrected because of various heavy distortion and for avoiding it from the decoding process. For this scheme, we adopt distortion coefficients of camera calibration when we separate a background image from a captured image. For finding available correction bits of ECC through the decoding process, we capture 30,000 images and then calculate the separation ratio of a background image and the average error bits per an image. As experimental result, the separation ratio of a background image is about 96.5% in 30,000 captured image. And the false alarm ratio shows about $5.18{\times}10^{-4}$ in the separated background image. And also we can confirm the availability of real-time processing because the mean execution time is about 82ms per an image for capturing and decoding.

• 복식
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• 제58권4호
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• pp.86-98
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• 2008

This study is purposed to determine the correlation between contemporary fashion and game characters' clothes and to analyze the formative property of the game characters' clothes expressed in the contemporary fashion. The temporal scope of this study is from 2004 to 2007 based on general online game ranks, while the game type is limited to 3D-online role playing game. The most popular clothes of game characters are analyzed and found to have imaginary, sensualistic, and cross-sexual features. These are also expressed as Cyber resistance image, Femme fatal image and Asexual image in the contemporary fashion. Firstly, the Cyber resistance image in the recent fashion is shown as belligerent, destructive and surrealistic image in contemporary fashion. Secondly, the Femme fatal image represents bewitching, brutal and narcissistic image with sleek materials and glowing colors in contemporary fashion. Thirdly, the Asexual image means the concept of sex as the neuter gender. Especially, this image has been introduced by simple and straight silhouette, black, silver, khaki colors in fashion. Accordingly, the clothes of game characters with the popularity and formative property have close correlation with contemporary fashion even if they do not pursue for practical creativity. In this respect, they can consolidate the position as a new fashion trend if they are developed with various design ideas.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.865-869
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• 2009

영상 해상도 향상 기술은 다양한 영상처리를 위한 전처리 기술로 주로 사용되며, 블러링과 같은 화질 저하 발생을 최소화하는 것에 대한 많은 연구가 진행되고 있다. 본 논문에서는 하위 레벨 보간을 이용한 영상 해상도 향상 기술을 제안한다. 제안하는 방법에서는 하위 레벨 보간을 이용하여 에러를 계산하고, 계산된 에러를 보간하여 에러를 추정한다. 추정된 에러는 보간된 고해상도 영상과 더해져서 최종적으로 해상도가 향상된 영상으로 복원된다. 동일한 영상을 이용한 실험을 통해서 기존 방법들보다 평균 약 1dB의 PSNR이 향상된 것을 알 수 있었고, 윤곽선을 비롯한 주관적 화질 향상을 역시 확인하였다. 제안하는 방법은 영상 복원과 같은 다양한 멀티미디어 응용 환경에서 활용될 수 있다.