All Questions
7
questions
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Question about bpy's matrix_world to torch3d coordinate system conversion
From the visualization results, it appears that the camera pose I converted is not accurate. It has moved backwards. Is there have any suggestions ?QAQ
1.difference of cameras space
2 some discussion
6
votes
1
answer
448
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Finding image coordinates of rendered vertex after refraction, distortion, etc
I'm in blender 2.92 working with the Python API. I know how to get the pixel coordinates of a vertex before refraction, lens distortion, etc.--see e.g. How to find image coordinates of the rendered ...
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0
votes
1
answer
809
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How to map/project bone coordinates to camera coordinates sytem/view?
I need the bone-head coordinates to be mapped on to the camera view. Actual scenario is to obtain the 3D coordinates of bone/joint. This is how I do it now.
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3
votes
0
answers
1k
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How to find if the vertex of an object is occluded by another vertex/face in front of it from a given viewpoint?
I can use the recipes on this page: How to find image coordinates of the rendered vertex?. But is there a way to know if a point is being occluded by some point/face in front of it from the viewpoint ...
- 81
4
votes
1
answer
2k
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How can I get the projection matrix of a panoramic camera with a fisheye equisolid lens?
I am working on a project in which i used the panoramic camera with fisheye equisolid lens on Cycles render. For some tests, I need the projection model that uses by this camera to project a 3D point ...
- 2,000
3
votes
1
answer
3k
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blender camera from 3x4 matrix
In computer vision, the transformation from 3D world coordinates to pixel coordinates is often represented by a 3x4 (3 rows by 4 cols) matrix P as detailed below. Given P I need code to return a ...
- 1,243
29
votes
2
answers
33k
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3x4 camera matrix from blender camera
In computer vision, the transformation from 3D world coordinates to pixel coordinates is often represented by a 3x4 (3 rows by 4 cols) matrix P as detailed below. Given a camera in Blender, I need ...
- 1,243