Description:
Algorithms used in producing computer graphics.
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Find plane normal and origin from homogeneous matrix
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Given a 3 x 4 matrix, how do I find the plane intersecting the three points expressed in homogeneous coordinate ?
Matrix is:
| a b c d |
| e f g h |
| i j k l |
Where X1=(a,b,c,d); X2=(e,f,g,h) and X3=(i,j,k,l) are 3 distinct points expressed in homogeneous coordinates. Those 3 points in space, define a plane such as Ax+By+Cz+D=0, (A,B,C,D constants not all zero). How do I find those A,B,C,D values ?... more »
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IV ECCOMAS Thematic Conference VipIMAGE 2013: LAST CALL
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Dear Colleague,
Attending several requests, the organizing committee has extended the submission of abstracts for the International Conference VipIMAGE 2013 - IV ECCOMAS THEMATIC CONFERENCE ON COMPUTATIONAL VISION AND MEDICAL IMAGE PROCESSING ([link]) to be held October 14-16, 2013, in Melia Madeira Mare Hotel, Madeira Island, Funchal, Portugal, to May 20th.... more »
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AVX vs SSE4 for Partitioned Ray-Tracing
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Hello
I've been playing around with AVX code to try and speed-up my ray-tracer which is accelerated using a SAH based kd-tree.
My triangle intersect routines are built using the intel embree library which makes it pretty easy to swap between an ssef (4 floats) and an avxf (8 floats) structure. So far it seems like swapping to AVX actually slows... more »
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IV ECCOMAS Thematic Conference VipIMAGE 2013: SUBMISSION REMINDER
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Dear Colleague,
We would like to call your attention that the deadline for abstracts submission for the International Conference VipIMAGE 2013 - IV ECCOMAS THEMATIC CONFERENCE ON COMPUTATIONAL VISION AND MEDICAL IMAGE PROCESSING ([link]) to be held October 14-16, 2013, in Melia Madeira Mare Hotel, Madeira Island, Funchal, Portugal, is approaching (April 15).... more »
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Biggest Fake Conference in Computer Science
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Biggest Fake Conference in Computer Science
I graduated from University of Florida and am currently running a computer firm in Florida. I have attended WORLDCOMP conference (see [link] for details) in 2010. Except for few keynote speeches and presentations, the conference was very disappointing due to a large number of poor quality papers and cancellation of some sessions. I was instantly suspicious of this conference.... more »
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General quadrics and transformation matrices
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Hello all,
I'm currently facing a problem and I think I have found a solution to it. However, I'd be interested to hear your opinion or hints on this.
I have users which can define a number of different bodies (e.g. cylinders, spheres, ellipsoids etc.) by providing the coefficients of the general quadratic surface equation:... more »
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L1 Metric Voronoi diagrams
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Hello everyone,
I was wondering what the upper bound of a 2-dimensional L1 Metric (Manhattan distance) Voronoi diagram would be. The lower bound is obviously the same as an L2 metric Voronoi diagram, namely zero.
I was considering using Euler's formula but I do not know how the handle the different faces that occur using L1 Metric.... more »
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