Artificial mosaics

Blasi, Gianpiero Di; Gallo, Giovanni

doi:10.1007/s00371-005-0292-4

Cited by 48 publications

(28 citation statements)

References 9 publications

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“…Another performance index of mosaic algorithms is the amount and spatial distribution of untiled space. The area left uncovered by the proposed technique is comparable with the amount of uncovered area left by [2], but gaps are here better distributed. For example the constraints of [2] force the appearance of a long "crack" in the vertical band on the wall behind Lena, while the proposed approach achieves in the same region a pleasant smoothness.…”

Section: Resultsmentioning

confidence: 79%

“…The area left uncovered by the proposed technique is comparable with the amount of uncovered area left by [2], but gaps are here better distributed. For example the constraints of [2] force the appearance of a long "crack" in the vertical band on the wall behind Lena, while the proposed approach achieves in the same region a pleasant smoothness. Relatively to [4] it should be observed that the uncovered area left by our technique is considerably less.…”

Section: Resultsmentioning

confidence: 79%

“…As for the parameter adopted to produce Figure 2, the tile size is 5×5 and the image size is 667×667. Typically, considering other images, we obtain covered area greater than [4] but smaller than [2]. In Figure 4 we show the same image processed using increasing tile size.…”

Section: Resultsmentioning

confidence: 92%

“…The method as been compared, to assess the aesthetic quality, with the mosaics obtained by [2] and [4] by using their original implementations. We wish to thank all the authors of these papers for providing the output of their techniques upon our request.…”

Section: Resultsmentioning

confidence: 99%

“…This approach obtains good results but, due to the high number of iterations necessary to reach convergence, it is computationally slow. In [2,3] the authors present an approach based on directional guidelines and distance transform. They obtain very realistic results with a linear complexity with respect to image size.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A Novel Artificial Mosaic Generation Technique Driven by Local Gradient Analysis

Battiato

Blasi

Gallo

et al. 2008

Computational Science – ICCS 2008

Self Cite

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Abstract. Art often provides valuable hints for technological innovations especially in the field of Image Processing and Computer Graphics. In this paper we present a novel method to generate an artificial mosaic starting from a raster input image. This approach, based on Gradient Vector Flow computation and some smart heuristics, permit us to follow the most important edges maintaining at the same time high frequency details. Several examples and comparisons with other recent mosaic generation approaches show the effectiveness of our technique.

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Novel Artificial Mosaic Generation Technique Driven by Local Gradient Analysis

Battiato

Blasi

Gallo

et al. 2008

Computational Science – ICCS 2008

Self Cite

View full text Add to dashboard Cite

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Generation of coherent mosaic animations: enhancement and evaluation of temporal coherence

Kang

Ohn

Han

et al. 2012

Computer Animation & Virtual

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Although the creation static mosaic-like images from non-mosaic input has been studied, satisfactory methods to maintain and evaluate the temporal coherence of tiles for mosaic animations have remained elusive. Here, we describe a method that successfully generates mosaic animations from videos by applying a temporally and spatially coherent tile-arrangement technique. We arrange tiles on the basis of the feature lines extracted from video input. We then animate the tiles along the motion of the video, add and delete tiles to preserve the tile density, and smooth tile color via frames. Finally, we propose indices to evaluate the temporal coherence of video-based animations, and show that our animations are temporally coherent.

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Producing stylized videos using the AnimVideo rendering tool

Gomes¹,

Oliveira²,

Britto-Neto³

et al. 2009

Int J Imaging Syst Tech

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Stylized rendering is the process of generating images or videos that can have the visual appeal of pieces of art, expressing the visual and emotional characteristics of artistic styles. A major problem in stylizing videos is the absence of temporal coherence, something that results in flickering of the structural drawing elements (such as brush strokes or curves), also known as swimming. This article describes the AnimVideo rendering tool that was developed for stylizing videos with temporal coherence. The temporal coherence is achieved by first fully segmenting the input video with a fast fuzzy segmentation algorithm that uses hybrid color spaces and motion information. The result of the segmentation algorithm is used to constrain the result of an optical flow algorithm, given as dense optical flow maps that are then used to correctly move, remove, or add structural drawing elements. The combination of these two methods is referred to as constrained optical flow, and we also provide the option of initializing the optical flow computation with displacement maps computed by homographies that map objects in adjacent frames. Also, we briefly describe some stylized rendering methods that were implemented in the tool. Finally, experimental results are shown, including snapshots of the tool's interface and illustrative examples of the produced renderings that validates the proposed techniques.

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Artificial mosaics

Cited by 48 publications

References 9 publications

A Novel Artificial Mosaic Generation Technique Driven by Local Gradient Analysis

A Novel Artificial Mosaic Generation Technique Driven by Local Gradient Analysis

Generation of coherent mosaic animations: enhancement and evaluation of temporal coherence

Producing stylized videos using the AnimVideo rendering tool

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