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Efficient Spatial Anti-Aliasing Rendering for Line Joins on Vector Maps
[article]
2019
arXiv
pre-print
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The spatial anti-aliasing technique for line joins (intersections of the road segments) on vector maps is exclusively crucial to visual experience and system performance. ...
Our experiment shows it has advantages of a realistic anti-aliasing effect, less memory cost, higher frame rate, and drawing line joins without overlapping rendering. ...
Finally, for the intersection of line segments, it display as a real arc. ...
arXiv:1906.11999v1
fatcat:znd4zfg6tnc4nlkji43n6wdbfy
An object-oriented progressive-simplification-based vectorization system for engineering drawings: model, algorithm, and performance
2002
IEEE Transactions on Pattern Analysis and Machine Intelligence
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AbstractÐExisting vectorization systems for engineering drawings usually take a two-phase workflow: convert a raster image to raw vectors and recognize graphic objects from the raw vectors. ...
The first phase usually separates a ground truth graphic object that intersects or touches other graphic objects into several parts, thus, the second phase faces the difficulty of searching for and merging ...
Moreover, in non-line-like areas (intersecting and degraded parts), the matching of contours is usually not one-to-one, but rather one-to-many or even many-to-many, which complicates analysis. ...
doi:10.1109/tpami.2002.1023802
fatcat:d27jyl626jb5bgm2n2ncdte2uq
Perceptual Rasterization for Head-mounted Display Image Synthesis
[article]
2018
arXiv
pre-print
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We suggest a rasterization pipeline tailored towards the need of head-mounted displays (HMD), where latency and field-of-view requirements pose new challenges beyond those of traditional desktop displays ...
To reduce latency, we extend the image formation model to directly produce "rolling" images where the time at each pixel depends on its display location. ...
Colored horizontal blocks are working time, colored lines are approximations of the view transform for images on display. ...
arXiv:1806.05385v1
fatcat:inqmoglyzjbydkyyzvxsduiu4y
Understanding Electronic Circuit Diagrams and Linking with ORCAD
1994
IAPR International Workshop on Machine Vision Applications
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This paper presents a rapid detecting method to tell the external contours from internal ones, and adopt an aid measure of adding ' black points" . ...
The processing contents on the connecting line include vector encoding, processing of intersecting points, joining two lines together and connecting lines with symbols, etc. ...
So we adopt an aid measure, adding ' black points' on the terminals of cach non-circular symbol and use a vector encoding method based on the edge detection along two-orthogonal LAG (Line ad jcency-graph ...
dblp:conf/mva/ZeshengCSJ94
fatcat:fu4hxzsnxjgt5bkurpukgpue3a
A NEW ALGORITHM FOR LINE IMAGE VECTORIZATION
1998
Pattern Recognition
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In this paper, a new approach which differentiates from the conventional thinning algorithms in vectorizing a raster line image called maximal inscribing circle (MIC) is used. ...
This method cannot only segment the lines and junctions, construct their spatial relationships in a computation efficient manner, but also retain their line width. 1998 Pattern Recognition Society. ...
The intersection point C is regarded as two control points instead of one.
Fig. 6 . 6 (a) Scanned raster image. (b) Raster image after thinning operation. ...
doi:10.1016/s0031-3203(97)00157-x
fatcat:szruujhahfd4xpthoizvym6qwy
an optimized rendering algorithm for hardware implementation of openVG 2D vector graphics
2008
2008 International SoC Design Conference
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In the rendering algorithm we adopted a hybrid of raster and vector rendering, which uses vector rendering only within each scanline, to reduce both the number of external memory accesses and the computational ...
We implemented a hardware accelerator with the proposed algorithm. ...
Finally, the generated edges are displayed through rasterization process on a raster screen. ...
doi:10.1109/socdc.2008.4815641
fatcat:pfxymcxzezgavgjcdp2hr4z574
Half-tone perspective drawings by computer
1967
Proceedings of the November 14-16, 1967, fall joint computer conference on - AFIPS '67 (Fall)
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the scan line intersects. ...
I ntersecting triangles may be resolved into non-intersecting triangles by a separate algorithm prior to execution of the present half-tone perspective algorithm. ...
doi:10.1145/1465611.1465619
dblp:conf/afips/WylieREE67
fatcat:3ivevynjd5ddnnlawte52zd4xa
Extracting Contour Lines Utilizing Features of a Raster Image Topographic Map
2001
Doboku Gakkai Ronbunshu
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., Hiroshima Inst. of Tech. (2 -1-1 Miyake, Saeei-ku, Hiroshima, 731-5193 Japan) It is a difficult task to automatically extract contour lines from a raster image topographic map and give each contour ...
All of the paints on a contour line indicate the same elevation, the difference of elevations between every neighboring contour line is constant, and most wide contour lines have numeral arrays pointing ...
Fig. 10 (a) shows a part of original raster image(about one sixtieth of the whole image) of example 1. The extracted contour lines are displayed in Fig. 10(b) . ...
doi:10.2208/jscej.2001.688_135
fatcat:juldw6ylpje23jw5uc6w6poiza
Fast simulation of x-ray projections of spline-based surfaces using an append buffer
2012
Physics in Medicine and Biology
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We introduced a special append buffer for increased performance in order to store the intersections with the scene for every ray. Intersections are then sorted and resolved to materials. ...
A custom graphics pipeline that simulates transmission projections for tomographic reconstruction was implemented based on moving spline surface models. ...
Then, a 2-D drawing routine is applied that is optimized for drawing speed based on a raster grid. ...
doi:10.1088/0031-9155/57/19/6193
pmid:22975431
pmcid:PMC3480228
fatcat:3snwq7tg3bex7il6cv3nept4cu
A general approach to discovering, registering, and extracting features from raster maps
2010
Document Recognition and Retrieval XVII
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Previous research on map processing has developed techniques that typically work on maps from a single map source. ...
A significant problem is that many interesting and useful maps are only available in raster format, and even worse many maps have been poorly scanned and they are often compressed with lossy compression ...
supported in part by the United States Air Force, Air Force Research Laboratory, Office of Scientific Research under contract number FA9550-08-C-0010 and grant number FA9550-07-1-0416, and in part by a ...
doi:10.1117/12.838967
dblp:conf/drr/KnoblockCCGMS10
fatcat:fb27p3zwvnfz3kbolfh2pub7la
Raster Map Image Analysis
2009
2009 10th International Conference on Document Analysis and Recognition
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A color histogram classification scheme is described, followed by the application of a tensor voting method to classify linear features in the map as well as intersections in linear feature networks. ...
The major result is an excellent segmentation of roads, and road intersections are detected with about 93% recall and 66 % precision. 10th International Conference on Document Analysis and Recognition ...
line segments which are on the same logical curved path or line. ...
doi:10.1109/icdar.2009.31
dblp:conf/icdar/HendersonL09
fatcat:vszd6yysk5dz7b5tukspfnxgye
ROOF RECONSTRUCTION FROM AIRBORNE LASER SCANNING DATA BASED ON IMAGE PROCESSING METHODS
2016
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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On that basis, a raster representation of roof facets is generated. Then roof polygons are determined from region outlines, connected to a roof boundary graph, and simplified. ...
The improvement originates in an interpolation algorithm that generates a height map from sparse point cloud data by preserving ridge lines and step edges of roofs. ...
The upper right picture displays the result of filling with respect to intersection lines and step edges. The lower left figure shows the outcome of polygon detection and simplification. ...
doi:10.5194/isprs-annals-iii-3-407-2016
fatcat:dqqyf7awjvbplhhldlf74eggoe
New portable FELIX 3D display
1998
Projection Displays IV
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An acoustooptic deflection unit with an integrated small diode pumped laser draws the images on the spinning screen. Images can consist of up to 10,000 voxels at a refresh rate of 20 Hz. ...
The first one is based on a standard PCMCIA digital/analog converter card as an interface and is controlled by a notebook. ...
Deter (Laser Display Technology, Gera, Germany, Figure 13 ). 25 To form a three-dimensional raster the projection unit has to draw planes consisting of lines. ...
doi:10.1117/12.305525
fatcat:mrkxu4guczeidlrhewn6pvjiou
Drawing Abrasive Hologram Animations with Auto-Generated Scratch Patterns
2017
2017 IEEE International Symposium on Multimedia (ISM)
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Abrasive holograms allow people to experiment with impressive quasi-holography and create hologram artwork through simple means of creating reflective scratches on sheets of plastic. ...
A model for classifying abrasive holographs is introduced. The classification framework is used to derive two new scratch pattern generation methods allowing the creation of arbitrary animations. ...
The speckles in 3D drawings move horizontally sideto-side along the arc. It is impossible to move a speckle along a sloped line or even a vertical line using a single curve. ...
doi:10.1109/ism.2017.57
dblp:conf/ism/SandnesE17
fatcat:ek72dm4ztjd3xpxqzdufcdgc7i
A general approach for extracting road vector data from raster maps
2011
International Journal on Document Analysis and Recognition
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In our experiments, we compared our approach to a widely-used commercial product using 40 raster maps from 11 sources. ...
Previous road vectorization approaches for raster maps typically handle a specific map series and require significant user effort. ...
We had a third-party to manually draw the centerline of every road line in the maps as the ground truth. ...
doi:10.1007/s10032-011-0177-1
fatcat:6winew4pufeb7dncuoprh52hom
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