• The KIPS Transactions:PartA
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• v.14A no.3 s.107
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• pp.151-158
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• 2007

Quadtree, which is a hierarchical data structure, is a very important data structure to represent images. The linear quadtree representation as a way to store a quadtree is efficient to save space compared with other representations. Therefore, it has been widely studied to develop efficient algorithms to execute operations related with quadtrees. The computation of block location is one of important geometry operations in image processing, which extracts a component completely including a given block. In this paper, we present a constant time algorithm to compute the block location of images represented by quadtrees, using three-dimensional $n\times n\times n$ processors on RMESH(Reconfigurable MESH). This algorithm has constant-time complexity by using efficient basic operations to deal with the locational codes of quardtree on the hierarchical structure of $n\times n\times n$ RMESH.

• The KIPS Transactions:PartA
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• v.10A no.3
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• pp.207-214
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• 2003

Quadtree, which is a hierarchical data structure, is a very important data structure to represent binary images. The linear quadtree representation as a way to store a quadtree is efficient to save space compared with other representations. Therefore, it has been widely studied to develop efficient algorithms to execute operations related with quadtrees. The linear translation is one of important operations in image processing, which moves the image by a given distance. In this paper, we present an algorithm to perform the linear translation of binary images represented by quadtrees, using three-dimensional $n{\times}n{\times}n$ processors on RMESH (Reconfigurable MESH). This algorithm has constant-time complexity by using efficient basic operations to route the locational codes of quardtree on the hierarchical structure of n${\times}$n${\times}$n RMESH.

• The Optical Journal
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• s.99
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• pp.45-51
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• 2005

미국의 PMA, 독일의 포토키나와 함께 사진쇼에서 함께 거론되곤 하는‘Photo Imaging Expo 2005’는 일본 카메라영상기기공업회, 사진감광재료공업회, 일본칼라라보협회, 일본사진영상용품공업회 등이 공동 주최하며 올해에는 사진관련 통합전시회로 열렸다. 양적으론 통합이지만 질적인 면에서는 4개 단체 합동이라도 빅사이트의 전시장을 통째로 빌리는 힘도 없이 전시장 2개 층만을 빌려 쓰는 초라한 상황은 격세지감을 느끼게 했다. 본 고는 수년 동안 렌즈 전문가의 입장으로 본 전시회를 다녀온 다카노 에이이치 선생이 전시회를 참관하고 나름대로 느낀 소감을 원고로 작성하여 광학세계에 기고한 것이다. 번역은 (주)이오시스템의 박성천 과장이 수고해주셨다.

• The Optical Journal
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• s.97
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• pp.53-57
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• 2005

국내에서 개최되는 국제 규모의 사진계 최대 행사인‘2005 서울국제사진영상기자재전/디지털영상전’이 5월 26일부터 29일까지 나흘간의 일정으로 코엑스 본관 1층 태평양홀에서 성대하게 개최된다. 해를 거듭할수록 국제전시회로서의 면모와 함께 아시아에서 가장 주목받는 전시회로 입지를 확고히 하면서 올해로 14회째를 맞이한 이번 전시회에는 세계 18개국에서 200여 업체가 참가하여 신제품 및 기술을 선보이며 사진시장의 흐름을 유감없이 보여줄 것이다.

• The Korean Publising Journal, Monthly
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• s.234
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• pp.13-13
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• 1998

생활의 때가 묻는 저자거리, 고장난 장난감처럼 어그러진 육체, 개인의 마음에 인화된 사진의 잔상, 황홀과 충격을 던져주는 영상 등 에술로 끌어올려진 포토에세이집들이 시선을 끈다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.23 no.3
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• pp.303-312
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• 2005

Digital map, DEM and orthophoto were produced by using PC based digital photogrammetric system and aerial photo images that were obtained with scale of 1/5,000 and scanning density of 1200dpi and 600dpi, and the accuracies of these outputs were evaluated by various methods. Non-skilled operator produced digital map with PC based digital photogrammetric system and aerial photo images scanned by 1200dpi. The results showed that it was impossible to insert contour lines, but the rest elements could be drawn with the accuracy of 1/1,000. In automatic generation of DEM, scanning density of aerial photo and grid interval of DEM didn't affect the accuracy of DEM. In production of orthophoto, we could know that the larger grid interval of DEM, the lower accuracy of orthophoto, but scanning density of original image had more effect on quality of orthophoto. By the way, accuracy comparison between orthophoto and digital map with same check points showed that orthophoto was more accurate than digital map, and orthophoto could be used in more diverse areas. Hereafter in civilian part, aerial photo image and PC based digital photogrammetric system could make practical application of data correction and update in GIS.

• The Optical Journal
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• no.5 s.115
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• pp.19-21
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• 2008

사진의 디지털화가 진행되면서 시장이 위축되었던 인화시장이 살아날 조짐을 보이고 있다. PC나 메모리에 저장되어 있던 사진들을 인화시장으로 이끌어내기 위한 갖가지 방안이 업계를 주축으로 활발히 연구되고, 새로운 대안이 제시되고 있다. 한국후지필름은 '포토이즈'라는 신 개념의 사진점포를 선보이며 신개념의 사진문화를 선도해 가고 있는 가운데, 최근에는 프린터 업체인 한국HP가 'HP포토카페'라는 사진인화점을 통해 사진인화시장 진출을 선언하고 나서 기존 필름업계가 장악해온 사진인화시장에 일대 변화가 예고되고 있다. 따라서 향후 사진인화시장을 놓고 기존 필름업계와 프린터업계 중 어느 쪽이 주도권을 갖고 갈 것인지에 대해서도 관심이 높아지고 있다.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.559-564
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• 2002

본 논문에서는 범죄수사의 초동수사 기법으로 사용되고 있는 몽타주와 실물 사진과의 근사 영상 검색 알고리즘을 제안한다. 입력 몽타주를 얼굴인식 기법에 적용하여 이진영상화와 형태학적 필터로 영상의 잡음을 제거한 후 경계선을 추출하였다. 추출된 경계선 영상으로 레이블링 과정을 거친 후 얼굴의 중요 요소를 포함하는 특징얼굴을 구성한다. 특징얼굴은 웨이블릿 변환을 통해 다운 샘플링 된 LL대역의 계수로 변환되며, 고유값 연산을 통해 계수 매트릭스의 고유 값을 추출 한다. 입력 몽타주의 고유값은 같은 절차를 거친 실물 사진의 저장된 고유값과 계수의 분포를 비교한다. 실험 결과 몽타주와 유사한 실물 사진을 검색할 수 있었으며 영상의 크기 변화와 왜곡 및 압축에 견고한 비교 검색 결과를 얻었다.

• Journal of Korean Society for Geospatial Information Science
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• v.5 no.2 s.10
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• pp.99-110
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• 1997

Image matching to determine the conjugate points in stereo photos is the one of the most important subject in digital photogrammetry and many researches In digital photogrammetric field are on going to automate the image matching process. In this study, we analyzes the effect of allowable correlation coefficient, which controls the accuracy in areal based image matching, on the accuracy of digital photogrammetry. So, some areal based matching methods such as image correlation coefficient matching, image Pyramid matching and interest point matching, are implemented, and the effect of allowable correlation coefficient on accuracy of digital photogrammetry in each method is analyzed. As a result of this study, a method to determine the optimal correlation coefficient is presented.

• The Journal of the Convergence on Culture Technology
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• v.10 no.3
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• pp.723-730
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• 2024

In order to trace the changes in the concept and understanding of automatically generated images, this study analogously explores the creative methods of photography and cinema, which represent the existing image fields, in terms of AI-based image creation methods and 'automaticity', and discusses the understanding and possibilities of new automatic image creation. At the time of the invention of photography and cinema, the field of 'automatic creation' was established for them in comparison to traditional art genres such as painting. Recently, as AI has been applied to video production, the concept of 'automatic creation' has been expanded, and experimental creations that freely cross the boundaries of literature, art, photography, and film are active. By utilizing technologies such as machine learning and deep learning, AI automated creation allows AI to perform the creative process independently. Automated creation using AI can greatly improve efficiency, but it also risks compromising the personal and subjective nature of art. The problem stems from the fact that AI cannot completely replace human creativity.