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A comment on 3D scatterplot of an image. Parent comment

Re:3D scatterplot of an image by infinite8s on Friday December 15, 2017 @03:28PM (#15934802)
How would you determine if they were within the range? That's effectively converting it into a 3D space.
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Re:3D scatterplot of an image by thechao on Friday December 15, 2017 @07:54PM (#15936638)
A few plane equation evaluations—then a few ands, and a sum. Plenty of horsepower on a pentium pro to do that.
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Re:3D scatterplot of an image by infinite8s on Wednesday December 20, 2017 @10:21AM (#15970272)
Those plane equations are describing the pixel in 3D space.
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