Automated pebble mosaic stylization of images

Digital mosaics have usually used regular tiles, simulating the historical "tessellated" mosaics. In this paper, we present a method for synthesizing pebble mosaics, a historical mosaic style in which the tiles are rounded pebbles. We address both the tiling problem, where pebbles are distributed over the image plane so as to approximate the input image content, and the problem of geometry, creating a smooth rounded shape for each pebble. We adapt SLIC, simple linear iterative clustering, to obtain elongated tiles conforming to image content, and smooth the resulting irregular shapes into shapes resembling pebble cross-sections. Then, we create an interior and exterior contour for each pebble and solve a Laplace equation over the region between them to obtain height-field geometry. The resulting pebble set approximates the input image while presenting full geometry that can be rendered and textured for a highly detailed representation of a pebble mosaic

Image Analysis and Automatic Composition of Ceramic Mosaics

The automatic composition of ceramic mosaics by computer vision techniques is studied. In the proposed system, images are reproduced onto a ceramic mosaic based on image resolution, ceramic tile's dimensions, available colours. A camera takes images of ceramic tiles to be used and guides a robot to pick the correct tile and place it at the right position in the mosaic. Colour-based segmentation and colour calibration are needed to select and extract the correct tile according to the colour to be reproduced. The input image is quantized and dithered to find the best representation given the available tiles. Issues related with the interface with robotic system are addressed. [DOI: 10.1685 / CSC06103] About DO

Collage Sculptures

In this thesis, I develop a program to automatically assemble collage sculptures, sets of arbitrary, non-overlapping elements arranged to fill out a recognizable target shape according to a set of procedural rules. A user provides the target and element shapes and the program procedurally places the elements in spherical holes in the target space. A signed distance function defined over the target space keeps track of the remaining holes to fill. Elements are preprocessed to determine the size of their smallest enclosing bounding sphere. They are placed in holes based on the radius of their bounding sphere. After each placement, the signed distance function is efficiently updated to account for the newly added element. Elements are placed from largest to smallest, filling the space to a predefined threshold. To demonstrate this program, I generated a number of collage sculptures. In accordance with our procedural rules, the elements in the resulting collage sculptures recognizably represent the target shape, do not overlap, are not deformed from their original shape, and display variety in size, position, and orientation

Development of graphic symbols based on tropical plant images in decorative tiles production

The most important aspect of choosing tile is the pattern design. Therefore the importance of focusing the production process in design has become crucial. The biological, physical and visual aspects of environment influence life philosophy, culture, society, tradition and creativity development. In the production of design symbols, it is evident that there is lack of focus and assessment given to the production process compared to that of the end product. The importance of the transformation process is emphasized by Wallschlaeger and Cynthia Busic-Synder who believe that the problem solving processes are shown to illustrate how the process can be altered for use in solving specific types of problem in design. Therefore, the objectives of this research are to determine the significance of systematic design process and ideas transformation in the development of graphic symbol. This study explores the relationship between tiles production and its pattern within an activity theory framework, focusing on data collected using questionnaires survey from selected universities in Peninsular Malaysia and interviews at Design Department of selected manufacture in Peninsular Malaysia. At the conclusion of this paper, a design criteria and analysis of system will be developed before production process of decorative tiles design from tropical plants image

Scattered Mosaic Rendering Using Unit Images

An image mosaic method that can be used when creating advertisements or posters is proposed in this study. Mosaic is a method that expresses an entire image using an arbitrary number of cells. Photomosaic generates new images using a combination of photos. In this paper, we propose a new mosaic algorithm that generates an abstract artistic mosaic image by filling a region that is divided by a boundary using a unit image, which is an image that only has a shape and no allocated color. A unit image can be changed diversely through rotation or shifting, and the corresponding region is filled by using the gradient direction and edge information of the input image. For this, we extract and use information from input image such as color, edge and gradient. In result we can generate various abstractive images which can be used in advertisement and multimedia contents market

A photomosaic image generation method using photo annotation in a social network environment

With the growing use of social networking services, various applications have been developed to utilize their vast capabilities. Photomosaic techniques, which combine many images to create a new rendering of an input image, can benefit from the capabilities of social networks. In this study, we propose a method that generates a photomosaic image by considering social network context. Our algorithm creates a photomosaic that incorporates photos posted by other users in the users network. We enable the matching function to easily select photos from the albums of users who are connected to the owner of the input image, by computing the closeness of those connections. Moreover, our technique allows the photos in the albums of friends who are annotated in the source image to be matched more effectively

Image Sampling with Quasicrystals

We investigate the use of quasicrystals in image sampling. Quasicrystals produce space-filling, non-periodic point sets that are uniformly discrete and relatively dense, thereby ensuring the sample sites are evenly spread out throughout the sampled image. Their self-similar structure can be attractive for creating sampling patterns endowed with a decorative symmetry. We present a brief general overview of the algebraic theory of cut-and-project quasicrystals based on the geometry of the golden ratio. To assess the practical utility of quasicrystal sampling, we evaluate the visual effects of a variety of non-adaptive image sampling strategies on photorealistic image reconstruction and non-photorealistic image rendering used in multiresolution image representations. For computer visualization of point sets used in image sampling, we introduce a mosaic rendering technique.Comment: For a full resolution version of this paper, along with supplementary materials, please visit at http://www.Eyemaginary.com/Portfolio/Publications.htm

A New Texture Synthesis Algorithm Based on Wavelet Packet Tree

This paper presents an efficient texture synthesis based on wavelet packet tree (TSWPT). It has the advantage of using a multiresolution representation with a greater diversity of bases functions for the nonlinear time series applications such as fractal images. The input image is decomposed into wavelet packet coefficients, which are rearranged and organized to form hierarchical trees called wavelet packet trees. A 2-step matching, that is, coarse matching based on low-frequency wavelet packet coefficients followed by fine matching based on middle-high-frequency wavelet packet coefficients, is proposed for texture synthesis. Experimental results show that the TSWPT algorithm is preferable, especially in terms of computation time