• Journal of Korea Multimedia Society
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• v.12 no.7
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• pp.913-921
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• 2009

Quantization is an essential method for compression of video. The quantizer can adjust the bitrate and control the picture quality. Especially, the subjective picture quality can be improved if the concerned region within a video sequence has good picture quality. In this paper, firstly a classification method according to the subjective concerned region within the video sequence is suggested. Also we propose a method that assigns the quantization step-size differentially according to the concerned region within the video. Totally subjective picture quality can be increased by appling the quantization step-size as small value relatively for the concerned region compared with the other regions. We can find the result that the proposed method gives the improved picture quality by assigning differently quantization step-size and the best improvement can be brought when the difference between maximum and minimum values of the quantization step-size in a picture is from 4 to 8.

• Korean Journal of Child Education & Care
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• v.18 no.2
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• pp.17-32
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• 2018

The purpose of this study is to examine the development of theory of mind on the story sharing with picture books. The subject of this study is 38 five years olds children who are attending C kindergarten in J city, Jeollabuk-do province. It was executed that an twelve sections of storytelling with picture books during six weeks. The storytelling activities were performed with predicting and listening of picture book contents, problem situation knowing and story sharing, feeling of the character mind condition, and activities evaluating. The results were as follows. First, the story sharing with picture books were significantly different between the groups on the development of mind. Second, the story sharing with picture books including theory of mind were effective on the perspective taking ability. The results showed that the story sharing with picture books was effective teaching and learning method.

• Journal of Information Science Theory and Practice
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• v.6 no.2
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• pp.46-61
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• 2018

The mobile social networking application Instagram is a well-known platform for sharing photos and videos. Since it is folksonomy-oriented, it provides the possibility for image indexing and knowledge representation through the assignment of hashtags to posted content. The purpose of this study is to analyze how Instagram users tag their pictures regarding different kinds of picture and hashtag categories. For such a content analysis, a distinction is made between Food, Pets, Selfies, Friends, Activity, Art, Fashion, Quotes (captioned photos), Landscape, and Architecture image categories as well as Content-relatedness (ofness, aboutness, and iconology), Emotiveness, Isness, Performativeness, Fakeness, "Insta"-Tags, and Sentences as hashtag categories. Altogether, 14,649 hashtags of 1,000 Instagram images were intellectually analyzed (100 pictures for each image category). Research questions are stated as follows: RQ1: Are there any differences in relative frequencies of hashtags in the picture categories? On average the number of hashtags per picture is 15. Lowest average values received the categories Selfie (average 10.9 tags per picture) and Friends (average 11.7 tags per picture); for highest, the categories Pet (average 18.6 tags), Fashion (average 17.6 tags), and Landscape (average 16.8 tags). RQ2: Given a picture category, what is the distribution of hashtag categories; and given a hashtag category, what is the distribution of picture categories? 60.20% of all hashtags were classified into the category Content-relatedness. Categories Emotiveness (about 4.38%) and Sentences (0.99%) were less often frequent. RQ3: Is there any association between image categories and hashtag categories? A statistically significant association between hashtag categories and image categories on Instagram exists, as a chi-square test of independence shows. This study enables a first broad overview on the tagging behavior of Instagram users and is not limited to a specific hashtag or picture motive, like previous studies.

• Journal of Broadcast Engineering
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• v.22 no.3
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• pp.397-400
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• 2017

Recently, a lot of images containing various global movements have been generated by the activation of the photographic equipment such as the drone and the action cam. In this case, when the motion such as rotation, scaling is generated, it is difficult to expect a high coding efficiency in the conventional inter-picture prediction method using the 2D motion vector. In this paper, we propose a video coding method that reflects global motion through homography reference pictures. As a proposed method, there are 1) a method of generating a new reference picture by grasping a global motion relation between a current picture and a reference picture by homography, and 2) a method of utilizing a homography reference picture for inter-picture prediction. The experiment was applied to the HEVC reference software HM 14.0, and the experimental result showed an increase in encoding efficiency of 6.6% based on RA. Especially, the results using the videos with rotational motion have a maximum coding efficiency of 32.6%, which is expected to show high efficiency in video, which is often represented by complex global motion such as drones.

• Journal of the Korean association of regional geographers
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• v.4 no.2
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• pp.65-77
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• 1998

One of the fundamental, important preconditions for effective teaching of geography is to collect a variety of picture data available for class and to manage the data systematically. The purpose of this study is to present one method about how to supply basic picture data available for class of Korean geography for the high school program to teachers in service and how to collect, manage and utilize the data. A total of 233 picture data related to contents of the textbook of Korean Geography have been gathered through this study, and a database has been constructed for the data. Directories were generated for individual units of the textbook, and the collected picture data was stored in the image file of each directory. This data was recorded in a CD and attached as an appendix. Since the primary purpose of this study is to suggest one method, the picture data in a database for the present study is just a fraction of lots of data available for class of Korean geography. If the user persistently enlarges and manages data based on the results of this study, the data will become a good instructional aid. The picture data can be printed over the transparent film and used for class by using the overhead protector (OHP), or it can be also used as a remote self-study tool through the computer telecommunications network (e.g., LAN or INTERNET. etc,). Most desirable, however, is to develop teachers' own method by taking account of separate units of the textbook or diverse educational environments.

• The Journal of the Convergence on Culture Technology
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• v.9 no.5
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• pp.311-317
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• 2023

The purpose of this study is to qualitatively examine the play experience and meaning of young children who enjoy the appreciation of picture books based on the 2019 revised Nuri curriculum centered on children and play, and furthermore, various play imaginations and ideas in picture books are realized by T robot. The collected various play cases were analyzed by arranging them into play flow diagrams centering on each picture book, and based on this, the meaning of play was discovered by categorizing play through reading the meaning of play. Therefore, this study is meaningful in that it supports <Picture Book-linked Young Children's Robot Play>, a play experience in which various playful imaginations in picture books are realized by young children's robots, and examines the experience of creatively creating play led by young children in depth, and furthermore, it is valuable in providing a basis for the direction of play-centered SW education centered on young children.

• 한국정보디스플레이학회:학술대회논문집
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• 2004.08a
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• pp.23-25
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• 2004

Present status of picture quality and the future target status for FPD TV's are shown based on the evaluated result of FPD TVs and CRT TVs. FPD TV will be required to be design under ergonomics concept and to be revised some of the definition for to enrage the market.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.679-682
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• 2006

By adjusting driving voltage, the image quality and optical characteristics have been improved. Based on the experiment results. Optical properties including viewing angle and color shifts at bias voltage 2.4 V are better than those of bias voltage 1 V.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.3A
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• pp.325-333
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• 2000

The proposed RPSS(Reference Picture Segment Selection) mode is the RPS mode in picture segment of the ISD mode. The RPS mode has the weakness that it has to change the whole reference picture even if transmission error occurs only in the small part of picture. If the RPS mode is applied only to an error-occurred part and a conventional coding scheme is applied to an error-free part, the higher coding efficiency can be obtained. Simulation results show that there is the optimal number of segment which provides that best performance with given environment such as the BER(Bit Error Rate) of wireless channels, the characteristics of imput sequence, what kind of RPSS mode is used, etc. To apply the channel-adoptive RPSS mode later, the scheme which can change the number of segment without INTRA refresh and spatial error propagation is proposed in this paper.

• Korean Journal of Child Studies
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• v.29 no.1
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• pp.227-241
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• 2008

This research explored contemporary cities and children's lives in picture books by a survey of 71 picture books published and translated into Korean from 1996 to 2006. These books represented city or urban life as their settings with children or personified animals as their main characters. They were classified by four categories. Results were the city space that most frequently appeared in the picture books were streets (73%) including downtown (38%) and back streets (6%). Emotions displayed by children in the city were mainly negative feelings (60%) including fear, worry, sadness, and boredom. The most important issue was alienation (28.5%). Main characters barely managed to cope with life in the city (76%).