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Glossary of Computer Vision Terms
Published in Edward R. Dougherty, Digital Image Processing Methods, 2020
Robert M. Haralick, Linda G. Shapiro
A texel, short for texture element, is a triplet whose first component is the (row, column) location of a small neighborhood, whose second component is the size of the neighborhood, and whose third component is the vector of texture properties.
The KD-ORS Tree: An Efficient Indexing Technique for Content-Based Image Retrieval
Published in D. P. Acharjya, V. Santhi, Bio-Inspired Computing for Image and Video Processing, 2018
Texture means visual pattern, which is one of the main features utilized in image processing. It describes the distinctive physical composition of a surface and contains information about structural arrangements of the surface, like clouds, leaves, bricks, etc. Since an image is composed of pixels, texture can be defined as the entity consisting of mutually related pixels and group of pixels. This group of pixels is called texture primitives or texture elements, referred to as texels. The methods of characterizing texture fall into two major categories: Statistical and Structural. The former qualifies texture by the statistical distribution of the image density, and the latter describes texture by identifying structural primitives and their placement rules. The Gabor filter belongs to the structural category, and is used to extract the texture features in the proposed system.
Texture Feature Extraction
Published in R. Suganya, S. Rajaram, A. Sheik Abdullah, Big Data in Medical Image Processing, 2018
R. Suganya, S. Rajaram, A. Sheik Abdullah
A feature used to partition images into regions of interest and to classify those regions provides information in the spatial arrangement of colours or intensities in an image characterized by the spatial distribution of intensity levels in a neighbourhood repeating pattern of local variations in image intensity cannot be defined for a point. Texture is a repeating pattern of local variations in image intensity. For example, an image has a 50% black and 50% white distribution of pixels. Three different images with the same intensity distribution, but with different textures. Texture consists of texture primitives or texture elements, sometimes called texels.Texture can be described as fine, coarse, grained, and smooth, etc.Such features are found in the tone and structure of a texture.Tone is based on pixel intensity properties in the texel.While structure represents the spatial relationship between texels.IF texels are small and tonal differences between texels are large a fine texture results.If texels are large and consist of several pixels, a coarse texture results.
Interactive data styling and multifocal visualization for a multigrid web-based Digital Earth
Published in International Journal of Digital Earth, 2021
M. J. Sherlock, M. Hasan, F. F. Samavati
The versatility of visualization in our presented system can be largely attributed to the consistent manner in which we treat various geospatial datasets – as data textures. Our rendering techniques process an array of data textures, wherein each texel represents the same location and area as its equivalent in another data texture, or channel therein. This enables the use of GPU-based hardware acceleration on the client-side, where a shader performs the required operations on multiple data textures. The ability to combine these data textures on the shader allows for fast and diverse client-side styling, and even animations between different styles.
Application of Computer Image Processing Technology in Visual Communication System
Published in Applied Artificial Intelligence, 2023
Guanglin Chen, Sinong Ding, Wei Liu
In actual processing, the following three situations occur. The first is that there are a variety of texture texels in the texture space, in which the minimum unit of two-dimensional texture corresponds to a 3D model pixel. The second is that each texel corresponds to a plurality of 3D model pixels. Finally, each texel corresponds to a 3D model pixel. For these three cases, targeted treatment must be implemented separately. The texture is obtained by shooting, so coordinate conversion is an important issue. The texture shooting process and coordinate system are shown in Figure 7.