A. Appel, F. J. Rohlf, and A. J. Stein. The haloed line effect for hidden line elimination. In Computer Graphics (Proceedings of SIGGRAPH 79), volume 13, pages 151--157, Aug. 1979.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....image, and in [Salis97] the strokes are generated automatically from both a set of reference strokes and an interactively modifiable direction field. The second approach creates line art illustrations from 3D geometry. An early step in the development of this technique was the use of haloed lines [Appel79] which give an impression of depth. Different line styles such as line width, dashed or dotted lines can be employed for outline and shading [Doole90a, Doole90b] Leist94] discusses a ray tracing approach to emulate copper plates. Most recently, Deuss99] takes advantage of the graphics hardware ....

Appel, A.; Rohlf, F.; Stein, A.: The Haloed Line Effect for Hidden Line Elimination, Computer Graphics (Proc. SIGGRAPH '79), pp. 151-157, 1979

....surfaces. 3 1.2 Related work Despite its advantages, the field of illustration has received relatively little attention in the computer graphics community. We survey the related work here. One of the earliest results having to do with creating illustrations from 3D models is due to Appel et al. [2]. These authors presented an algorithm for improving a simple wireframe rendering with haloed line effects. A haloed line has a small white gap where it crosses another line that is closer to the viewer, to enhance the illusion that it is passing behind, and to more clearly convey the illusion of ....

Arthur Appel, F. James Rohlf and Arthur J. Stein. The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (August 1979), 151--157.

....a 600 dpi HP LaserJet 5Si MX printer. Real samples were scanned at 150 dpi and printed at 150 dpi. 1. 1 Related work Our work is related to research on 3D non photorealistic rendering dealing with display methods which approximate technical or artistic hand drawn illustration or painting styles [1, 13, 25, 5, 26, 36, 32, 23, 11, 4, 18, 16, 3, 7]. We were inspired in our work by recent approaches that tailored 3D NPR techniques to particular media models, specifically the work of Winkenbach and Salesin [36] in which results were produced from emulating the pen and ink illustration style, and the work of Curtis et al. 3] describing a ....

....functions with random noise and turbulence to each pair of coordinates #x; y# at scalar distances t along the stroke s path. a) Pressure (c) Pressure distribution coefficients y x (d) Finger distance (f) Wrist and arm movement (e) Pencil slanting (b) Polygonal tip Stroke path P(t) [0,1] 4 line segments y finger fd a b x Figure 8: Example of a path for a pencil stroke (top row) and variation of six parameters from the character function C#t# defining the pencil stroke primitive, rubbed with soft leads over a rough, medium weight paper. a) b) c) d) Figure 9: Outline ....

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A. Appel, F.J. Rohlf, and A.J. Stein. The Haloed Line Effect for Hidden Line Elimination. In ACM Computer Graphics (Proc. of SIGGRAPH ' 79), volume 13, pages 151--157, August 1979.

....image representations of Haeberly[10] Beyond the creation of a pleasing display, the objective of nonphotorealistic image synthesis is to improve the viewer s comprehension of geometric objects. This problem was first addressed in the context of comprehensive wire frame rendering by Appel et. al[1]. and improved by Kamada and Kawai[12] Dolley and Cohen [6] further enhanced the treatment of line drawings by controlling the line style according to importance tags and illustration rules. Strothotte et. al[29] designed a sketch renderer. They studied how the variation of line styles and ....

....a photorealistic image by simple lines and textures, thus edges of the displayed objects and surface directions are highlighted. Even though many NPR algorithms generate black and white images they do not use the results of conventional halftoning. The issue of tone reproduction is either ignored [1, 12, 6, 29] or is addressed by an alternative often computationally expensive technique [14, 20, 7, 8, 22, 35] In this work we follow a different approach and extent the conventional halftoning to non photorealistic rendering. A similar approach was taken by Ostromoukhov and Hersch[17] who modified ordered ....

A. Appel, F. J. Rohlf, and A. J. Stein. The haloed line effect for hidden line elimination. In Computer Graphics (SIGGRAPH '79 Proceedings), volume 13, pages 151--157, August 1979.

....to work on non photorealistic rendering techniques, while most of the work in computer graphics done so far has been dealing with the generation of photorealistic images. Early work in non photorealism focussed on how to draw hidden lines in order to enhance the comprehensibility of line drawings [1, 11]. Drawing with different lines styles was introduced by Dooley and Cohen [3] while Strassmann [25] proposed a method for simulating hairy brushes in order to obtain watercolor like drawings. Guo and Kunii added a method for simulating ink diffu Universittsplatz 2, 39106 Magdeburg, Germany, ....

A. Appel, F. J. Rohlf, and A. J. Stein. The haloed line effect for hidden line elimination. Computer Graphics (SIGGRAPH '79 Proceedings), 13(3):151--157, August 1979.

....these patterns would make a good starting point for some of the pen and ink techniques described in this paper. With respect to line drawing techniques, Appel et al. were the first to discuss how a line could be haloed automatically to give the appearance of one line passing behind another [2]. Kamada and Kawai generalized this work by showing how different line attributes, such as dashed and dotted line, could be used to give a more informative treatment of hidden lines [12] Dooley and Cohen later introduced more line qualities, such as thickness, and discussed how the treatment of ....

Arthur Appel, F. James Rohlf, and Arthur J. Stein. The haloed line effect for hidden line elimination. Proceedings of SIGGRAPH '79 (Chicago, Illinois, August 8-10, 1979. In Computer Graphics 13, 2 (August 1979), 151--157.

....display of an object by rendering the silhouette of the object. Their work differs from ours in that they do not want to process all of the polygons and thus focus on approximating the silhouette. In their paper they presented a probabilistic silhouette rendering technique that is based on Appel s [1] work on hidden surface removal. Gooch et al. 2] presented a cartoon illumination model that used silhouette rendering as one of its parameters. In particular they presented two methods for highlighting the silhouettes, the first used a environment map with the circumference of the texture being ....

....The FB flags for the edges in the current polygon are updated depending on whether the polygon is front facing or back facing. For a front facing polygon we XOR a 1 value into the F field and for a back facing polygon we XOR a 1 into the B field. The polygon defined by the vertices 1,2, and 3 (P[1,2,3]) is a front facing polygon. After P[1,2,3] is processed the edge buffer has the following values (new values are in bold font) Ve r ex VFB VFB VFB VFB 1 210 310 400 500 2 310 500 x00 x00 3 400 500 x00 x00 4 500 x00 x00 x00 5 x00 x00 x00 x00 After polygon P[1,3,4] is processed the edge ....

[Article contains additional citation context not shown here]

A. Appel, F.J. Rohlf, and A.J. Stein. The haloed line effect for hidden line elimination. volume 13, pages 151--157, August 1979.

....by using gaps to indicate the passing of one object behind another; examples of this technique can be found as early as in the Paleolithic paintings within the caves of Lascaux. One of the first haloed line drawing algorithms for computer graphics was proposed by Appel et al. in 1979 [12]. FIG. 8. Two overlapping lines of roughly equivalent luminance but differing hue. Depth order relations are explicitly emphasized in the leftmost and rightmost depictions through the introduction of the subtle gaps flanking the foremost line. A simple modification to the basic LIC algorithm ....

A. APPEL, F. J. ROHLF and A. STEIN. The Haloed Line Effect for Hidden Line Elimination, Proceedings of SIGGRAPH 79, pp. 151-157.

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A. Appel, F. J. Rohlf, and A. J. Stein. The haloed line effect for hidden line elimination. In Computer Graphics (Proceedings of SIGGRAPH 79), volume 13, pages 151--157, Aug. 1979.

No context found.

APPEL A., ROHLF F. J., STEIN A. J.: The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (1979), 151--157. 6 [Bat68] BATCHER K. E.: Sorting networks and their applications.

No context found.

APPEL A., ROHLF F. J., STEIN A. J.: The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (1979), 151--157. 6 [Bat68] BATCHER K. E.: Sorting networks and their applications.

No context found.

APPEL A., ROHLF F. J., STEIN A. J.: The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (1979), 151--157. 6 [Bat68] BATCHER K. E.: Sorting networks and their applications.

No context found.

APPEL A., ROHLF F. J., STEIN A. J.: The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (1979), 151--157. 6 [Bat68] BATCHER K. E.: Sorting networks and their applications. In Proceedings of AFIPS Spring Joint Computing Conference (1968), vol. 32, pp. 307--314. 5 [BMP

No context found.

APPEL A., ROHLF F. J., STEIN A. J.: The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (1979), 151--157. 6 [Bat68] BATCHER K. E.: Sorting networks and their applications. In Proceedings of AFIPS Spring Joint Computing Conference (1968), vol. 32, pp. 307--314. 5 [BMP

No context found.

APPEL A., ROHLF F. J., STEIN A. J.: The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (1979), 151--157. 6 [Bat68] BATCHER K. E.: Sorting networks and their applications. In Proceedings of AFIPS Spring Joint Computing Conference (1968), vol. 32, pp. 307--314. 5 [BMP

No context found.

APPEL A., ROHLF F. J., STEIN A. J.: The haloed line effect for hidden line elimination. Computer Graphics 13, 2 (1979), 151--157. 6 [Bat68] BATCHER K. E.: Sorting networks and their applications. In Proceedings of AFIPS Spring Joint Computing Conference (1968), vol. 32, pp. 307--314. 5 [BMP

No context found.

A. Appel, F. J. Rohlf, and A. J. Stein. The haloed line effect for hidden line elimination. In SIGGRAPH 79 Conference Proceedings, pages 151--157. ACM SIGGRAPH, Addison Wesley, 1979.

No context found.

A. Appel, F.J. Rohlf and A.J. Stein. The haloed line effect for hidden line elimination. ACM Computer Graphics (Proc. of SIGGRAPH '79), 13(2):151--157, August 1979.

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