B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, Mar 1981.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....in the synthesized image. In order to keep the coherence term consistent at different scales, we attenuate it by a factor of 2 # L since pixel locations at coarser scales are spaced further apart than at finer scales. In a sense, 2 # L# represents an estimate of the scale of textons [29] at level #. We typically use 2 ## # 25 for color non photorealistic filters,# =1 for line art filters, and 0.5 ## # 5 for texture synthesis. Here is a more precise statement of this algorithm: function BESTMATCH(A, A # ,B,B # ,s,#,q) p app # BESTAPPROXIMATEMATCH(A, A # ,B,B # ....

Bela Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, 1981.

....feedforward model in which spatial attention follows object based attention. Under this account, visual routines identify regions of salience or coherence in the visual field preattentively and in parallel. These regions are then subjected to further analysis by focal spatial attention processing (Julesz, 1981; Koch Ullman, 1985; Neisser, 1967; Treisman, 1982; 1988) This view of has been proposed to account for numerous findings in the visual search literature as well as findings in which grouping, based on feature similarity or proximity, occurs early, in parallel and independent of spatial ....

Julesz, B. (1981). Textons, the elements of texture perception, and their interactions. Nature, 290:91-- 97.

....feedforward model in which spatial attention follows object based attention. Under this account, visual routines identify regions of salience or coherence in the visual field preattentively and in parallel. These regions are then subjected to further analysis by focal spatial attention processing (Julesz, 1981; Koch Ullman, 1985; Neisser, 1967; Treisman, 1982; 1988) This view of has been proposed to account for numerous findings in the visual search literature as well as findings in which grouping, based on feature similarity or proximity, occurs early, in parallel and independent of spatial ....

Julesz, B. (1981). Textons, the elements of texture perception, and their interactions. Nature, 290:91-- 97.

....(GCM) 8] second order spatial averages [10] and two dimensional filtering in the spatial and frequency domain [6,5,26,27] Other approaches operate at a symbolic level where a textured image is organized or represented in terms of primitives. Examples of this can be seen in Julesz s work [17,18] and in syntactic texture analysis. Some texture analysis methods, for example, Beck et al. have examined the role of spatial frequency 1. This research was supported in part by the US National Science Foundation Grant no. CDA 8806599. The facilities of the Pattern Recognition and Image ....

....that agree with human perception. The perceptual task can be both classification and segmentation. Julesz had conjectured [16,19] that texture pairs with identical second order statistics cannot be preattentively discriminated by humans, but he later gave counterexamples to this conjecture [17]. An important factor in the preattentive discrimination of such texture pairs appears to be certain shape features of the texture primitives. These features include closure, linearity, terminations, etc. which are called textons [17] The important questions that need to be answered in this ....

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B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, 1981.

....to associate these features, more or less easily perceived by a human, with computational image models used to describe and analyze the image textures. The texture model involves basic gray level (or color, or multi band) texture primitives that form texture elements, called textons by JULESZ [1981] or texels by HARALICK and SHAPIRO [1992] built from one or several primitives. Spatial interactions between the texels govern their spatial arrangement and particular signal values in each of the primitive. In this context, the interaction has no direct physical meaning and deals only with ....

Julesz, B.: Textons, the elements of texture perception, and their interactions. Nature 290 (1981) 91-97

....a number of promising avenues for interface design and data presentation. Statistical graphics [24] object and separate displays [26, 4, 18] emergent features [19, 18, 4] are some of these research areas. For the results reported in this paper, the work on pre attentive and attentive vision [23, 11, 16, 25, 8, 7] has established a number of important criteria for effective data presentation. Pre attentive vision employs an array of simple visual mechanisms to detect in parallel, instantaneously and effortlessly, features such as colour, shape, orientation, spatial frequency, movement and curvature. ....

Bela Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290(12):91--97, March 1981. 17

....product of these two sources of variation. Our goal is to build a small, finite vocabulary of microstructures, which we call 3D textons. This term is by analogy to 2D textons, the putative units of preattentive human texture perception proposed by Julesz more than 20 years ago. Julesz s textons [12] orientation elements, crossings and terminators fell into disuse as they did not have a precise definition for gray level images. In this paper, we re invent the concept and operationalize it in terms of learned co occurences of outputs of linear oriented Gaussian derivative filters. In ....

B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290(5802):91--7, March 1981.

....regions based on both brightness and texture. These objectives are coupled cue integration relies on, and thus reveals, the advantages of the texton representation. 1. 1 Introducing Textons Julesz introduced the term texton, analogous to a phoneme in speech recognition, more than 20 years ago [9] as the putative units of preattentive human texture perception. He described them qualitatively for simple binary line segment stimuli oriented segments, crossings and terminators but did not provide an operational definition for gray level images. Subsequently, texton theory fell into ....

B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290(5802):91--7, March 1981.

....divided into Preattentive and Attentive. Pre attentive vision is also called effortless or instantaneous . This work can be summarised by examining four representative theories: two focusing in pre attentive vision (Treisman s Feature Integration Theory[18] and Julesz s Texton Theory[10]) one studying attentive vision (Verghese s Span of Attention[19] and one in the generic operation of the human brain (Parallel Data Processing Theory[13] A discussion on the implications of these works for the design of a presentation model follows afterwards. 2.1.1. Feature Integration ....

.... Hoffman (1972) to suggest that attention can either be narrowed to focus on a single feature, when there is a need to see what other features are present and form an object, or distributed over a whole group of items which share a relevant feature. 2.1.2. Texton Theory Julesz s Texton Theory[10] takes a more formal approach to discriminate pre attentive from attentive vision. A set of different order statistics are employed. First order statistics are simply the set of probabilities that randomly thrown dots will land on a particular colour of the texture. Second order statistics (or ....

Bela Julesz. Textons, the elements of texture perception, and their interactions. Nature,

.... Texton extraction is a preattentive process and corresponds to the primal sketch in Marr s vision theory [Marr, 1976] Preattentive texture discrimination can serve as a model system with which to distinguish the role of local texture element detection from global computation in visual perception [Julesz, 1981]. Textons are extracted by using the Laplacian of the Gaussian (LoG) operator [Voorhees, 1987] Figure 4 shows an example of natural image and its textons. The textons are sparsely distributed over the homogeneous (or less textured, i.e. lower entropy) areas and vice versa. a) Natural image (b) ....

Julesz, B., 1981. Textons, The Elements of Texture Perception, and their Interactions. Nature, Vol. 290, No. 12, pp.9197.

....to the structural approach [19] a textured region is created by the regular repetition of a primitive element across the image. Many different primitives have been proposed: blobs [3, 54] edges [53, 14] peaks and ridges [10] run length primitives [15] Voronoi polygons [51] Julesz s textons [26, 27]. In the statistical approach texture is described by the joint probability distribution (or moments thereof) of neighbouring pixels. For instance the following have been used: co ocurence matrices [6, 11] correlation [7] gray level difference [55] Unser has proposed to use the projection of ....

B. Julesz. Textons, the elements of texture perception. Nature, 290:91--97, 1981.

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B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, Mar 1981.

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B. Julesz, Textons, the elements of texture perception, and their interactions, Nature 12 (1981), no. 290, 91--97.

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B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, 1981.

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B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, 1981.

No context found.

Bela Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, March 1981.

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B. Julesz, Textons, the elements of texture perception, and their interactions, Nature, 290, 12 March 1981.

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Julesz, B. (1981). Textons, the elements of texture perception, and their interactions. Nature, 290(5802), 91-97.

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Julesz, B. 1981. Textons, the elements of texture perception, and their interactions. Nature, 290(3).

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B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, vol. 290, pp. 91-97, 1981.

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B. Julesz. Textons, the elements of texture perception, and their interactions. Nature, 290:91--97, 1981.

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Julesz, B. (1981) Textons, the Elements of Texture perception, and their Interactions. Nature(London), 290, pp 91-97.

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B. Julesz, Textons, the elements of texture perception, and their interactions, Nature, 290, 12 March 1981.

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Julesz, B. (1981a). Textons, the elements of texture perception, and their interactions.

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