Real-time video photomosaics with optimized image set and GPU

Choi, Yun-Chul; Jung, Soonchul; Kim, Jae Woo; Koo, Bon-Ki

doi:10.1007/s11554-013-0384-8

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…This issue has been addressed by Choi et al . [CJKK13] and Kang et al . [KSRY11]: they report real‐time performance by optimizing the tile set and taking advantage of GPU acceleration.…”

Section: Related Workmentioning

confidence: 94%

Fast Rendering of Image Mosaics and ASCII Art

Markuš

Fratarcangeli

Pandžić

et al. 2015

Computer Graphics Forum

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An image mosaic is an assembly of a large number of small images, usually called tiles, taken from a specific dictionary/codebook. When viewed as a whole, the appearance of a single large image emerges, i.e. each tile approximates a small block of pixels. ASCII art is a related (and older) graphic design technique for producing images from printable characters. Although automatic procedures for both of these visualization schemes have been studied in the past, some are computationally heavy and cannot offer real-time and interactive performance. We propose an algorithm able to reproduce the quality of existing non-photorealistic rendering techniques, in particular ASCII art and image mosaics, obtaining large performance speed-ups. The basic idea is to partition the input image into a rectangular grid and use a decision tree to assign a tile from a pre-determined codebook to each cell. Our implementation can process video streams from webcams in real time and it is suitable for modestly equipped devices. We evaluate our technique by generating the renderings of a variety of images and videos, with good results. The source code of our engine is publicly available.

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“…This issue has been addressed by Choi et al . [CJKK13] and Kang et al . [KSRY11]: they report real‐time performance by optimizing the tile set and taking advantage of GPU acceleration.…”

Section: Related Workmentioning

confidence: 94%

Fast Rendering of Image Mosaics and ASCII Art

Markuš

Fratarcangeli

Pandžić

et al. 2015

Computer Graphics Forum

View full text Add to dashboard Cite

show abstract

“…They achieved interactive time performance for photomosaic using a database that consisted of thousands of photo tiles. Choi et al [6] also proposed a real-time approach that generates a photomosaic video. They employed genetic feature selection for building an optimized image set and GPU-accelerated pattern searching of CUDA for minimizing computation cost.…”

Section: Related Workmentioning

confidence: 99%

Photo collage-based photograph display system on mobile computing platform

Kang

Seo

2017

J Supercomput

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In the last few decades, mobile computing platform technology has grown rapidly, as observed from smart phones that have quickly become ubiquitous. The mobile computing platform is the most widely used platform in our life today, and digital photographs captured through these devices have become routine for most people. In this study, we propose a novel artistic method for displaying photographs in mobile devices as a photo collage. Using our system, users can view a representative photograph as a collage of photographs associated with a certain event, and access each of photographs individually. To implement this, we employ centroidal Voronoi diagram (CVD) to obtain an even distribution of tiles, and use the sites as the location of tiles. We use the edge avoidance technique to prevent tiles from being located across the edges. To obtain the direction of tiles that follow near a strong edge, we employ the Edge tangent Flow field, and use the field as the directions of tiles. Finally, we search for photos that best match the tiles calculated above by using a thumbnail difference metric.

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“…They reported that photomosaics composed of familiar photos are more satisfying to the viewers. Some other photomosaic generating methods were studied and proposed in [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Generating Photomosaics with QR Code Capability

Wang

2020

Mathematics

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A photomosaic is an image with two layers of visual information, including an overarching image that can be seen from a distance and a matrix of individual tile images when examined closely. This paper presents a method for generating photomosaics with an additional layer of quick response code (QR code) information that can be accessed by typical QR code scanners in cell phones. The basic idea is to carefully classify the tile images in different categories and generate the photomosaic patches by referring to the properties of QR code modules. Three levels of construction methods for generating the proposed photomosaics in different image resolutions are proposed. The results show that the generated photomosaics have good visual quality and high robustness for decoding the QR code. The proposed method endows conventional photomosaics with the QR code capability. It extends photomosaics from exhibiting purely visual information to the linkage of multimedia data. Furthermore, it increases the feasibility and potential of applying photomosaics in diverse applications, such as activity promotions or commercial product advertisements.

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Real-time video photomosaics with optimized image set and GPU

Cited by 5 publications

References 13 publications

Fast Rendering of Image Mosaics and ASCII Art

Fast Rendering of Image Mosaics and ASCII Art

Photo collage-based photograph display system on mobile computing platform

Generating Photomosaics with QR Code Capability

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