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BaowenZ / RaDe-GS

RaDe-GS: Rasterizing Depth in Gaussian Splatting
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About equation 22 #19

Closed AlexRoss-WHS closed 1 week ago

AlexRoss-WHS commented 1 week ago

Hi,

first of all thank you for this great work! Colud you please explain equation 22 ($n = J^T n'$) from the parer to me? Why does the transpose of $J$ transform the normal from ray-space to camera-space? I would have expected the inverse of $J$ to be used for this?

BaowenZ commented 1 week ago

Hi! Transformation of normal is sightly different from transformation of points. Please refer to http://groups.csail.mit.edu/graphics/classes/6.837/F98/Lecture18/Normals.html

AlexRoss-WHS commented 1 week ago

Thank you for the quick response!