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This paper proposes a novel technique which transfer an input image into a clean line drawing. The technique is fully automatic without user interaction. The proposed method is composed of four steps: color to grey conversion, smoothing processing, edge enhancement and clean line extraction. Edge enhancement algorithm is composed of image color invert, image blending and minimum filtering. Clean line...
Non-photo realistic rendering is common to both Computer Graphics and Digital Image Processing, and encompasses a broad class of techniques for creating artistic images from scenes, geometric models or photographic images. In this context, this paper presents a framework designed to generate cartoon-like abstracted images, which combines techniques for region smoothing and segmentation, edge detection,...
Recent trend of bigger and high resolution mobile display for smart-phone leads the needs of high performance of power saving technologies. Among those technologies, the representative technology is PenTile L6W technology which uses RGBW pixel and sub-pixel rendering algorithm. In this paper, the PenTile L6W and the other technologies are introduced. To achieve this power saving, display pixel structure...
Based on IBMR techniques, this paper present a method to separate elements of specular and diffuse reflection in an image. The ray projected from object surface to images includes energy distribution from ambient light, diffuse and specular light. The ray intensity of diffuse reflection or ambient light is irrelevant to viewpoint, but that of specular reflection will change with the moving of viewpoint...
Illumination makes an important role in realistic graphics rendering, especially in the mixed-scene rendering based on the geometric models and images. Adjusting illumination effect is a key step to achieve realistic scene when the images are inconsistent with the virtual environment. Therefore, complicated processing is required to generate the image with desired illumination condition. Using the...
An automatic algorithm of degraded color document image enhancement is proposed based on our previous work on Natural Rendering of Color Image using Retinex (NRCIR) with respects to document image characteristics. In the proposed work, an adaptive workflow is designed to enhance both luminance and chrominance contrast of document image while maintaining degradations within tolerance and hue-shift...
Subpixel-based down-sampling is a method that can potentially improve the apparent resolution of a down-scaled image by controlling individual subpixels rather than pixels. However, the increased luminance resolution often comes at the expense of chrominance distortion. In this paper, we formulate the subpixel-based down-sampling as a Min-Max problem (Min-Max Directional Error) which we call MMDE...
Subpixel-based down-sampling is a method that can potentially improve the apparent resolution of a down-scaled image by controlling individual subpixels rather than pixels. However, the increased luminance resolution often comes at the price of chrominance distortion. In this paper, we propose a new subpixel-based down-sampling scheme for which we design a two-dimensional image reconstruction model...
According to the jacquard technology, we present an enhanced halftoning algorithm for which the filter weights and the quantizer thresholds vary depending on input pixel value. This minimization brings the Fourier spectra of the selected key intensity levels as close as possible to the corresponding "blue noise" spectra. The continuity of the algorithm's behavior across the full range of...
The image analogy is a classical technique used in the style learning and Multimedia data mining. To regrettable the IA method can not be suitable to any pair of images. This article prime task has four aspects: 1 Proposed one kind of new image similarity measure operator. 2 Take Image difference measure operator as characteristic quantification IA method applicable scope. 3 To proposed one kind of...
Multi-color effect in Chinese painting has a special feature. To simulate its complex result of different color mixture in proportion, we introduced the calculation method of color mixture based on CIE-Lhs color model, and success to simulate the effect of pigments mixture superposition which fitting for the feeling of people through experimental analysis. Based in the method of multi-color effect,...
This paper presents a new GPU-based implementation of fast non-local means (NLM) filtering for material restyling. Our fast NLM filtering algorithm is able to achive realtime feedback of interactive image editing. Furthermore a novel material editing method based on our fast NLM filtering is proposed to change the material appearance of image-based objects. Given an input image, an alpha matte is...
Many artists attempt to make art work from famous celebrated picture or old masters. Normally they implement it in drawing or printing using photoshop to analysis the old masters and remake them. It is not special art work in modern art field. We attempt to remake them using directional line drawing alogorithm . It is one of NPR(non-photorealistic rendering, it is introduced in this paper. We implement...
This paper describes an algorithm that provides real-time walkthrough for globally illuminated scenes that contain mixtures of ideal diffuse and specular surfaces. A type of light field data structure is used for propagating radiance outward from light emitters through the scene, accounting for any kind of L(S\D)* light path. The light field employed is constructed by choosing a regular point subdivision...
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