All Questions
Tagged with coordinates camera
35
questions
0
votes
0
answers
93
views
Yaw Pitch Roll of camera in local coordinate system
I retrieved camera properties from a bunch of Unreal scenes that I want to reproduce in Blender. The Unreal coordinate system is quite different: it is a left-handed one, cameras face +X instead of -Z ...
- 31
0
votes
0
answers
12
views
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
0
votes
0
answers
25
views
Absolute and Relative Coordinates; Camera Distortion; Calculation
Hello Blender Community,
Question: How close is the object in the image? What are the absolute coordinates from the image's perspective? What is the error?
An object:
A frame with two reference ...
0
votes
1
answer
49
views
Recreating clip space coordinates in Blender shader nodes
I've been trying to recreate the clip space coordinate system in Blender's shader nodes. From what I know, the only coordinate systems you have access to are object coordinates (position), world ...
- 96
1
vote
0
answers
30
views
Calculate the pixel location of an object in the rendered result
I'm implementing a simple script to calculate the location of an object (which is a 2D plane) in the rendered image:
...
- 147
0
votes
0
answers
207
views
Blender import camera from COLMAP has wrong direction
I have the image.txt files from colmap, which includes the quaterion(QW, QX, Qy, QZ) and the translation(tx, ty, yz). I use the following code to do the transformation, but the direction of the camera ...
- 45
2
votes
0
answers
408
views
3D world to 2D image transformation with equidistant camera model
I'm currently implementing a simulation, where a 3D point needs to be transformed to a fisheye image with the equivalent of Blenders 'PANO' camera and the equidistant camera model. Does anyone know ...
- 21
0
votes
0
answers
133
views
How to describe an object in the camera reference frame?
I have an environment with a sphere, a camera and the sun. Both the camera and the sun track the sphere, such that they point always to the sphere.
All the coordinates are referred to the origin of ...
- 1
6
votes
1
answer
448
views
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 ...
- 61
0
votes
0
answers
444
views
Camera extrinsics matrix blender
The camera object in blender python API has the variable matrix_world. I was hoping it would give the camera pose wrt to the world coordinate system but if you ...
- 21
1
vote
0
answers
452
views
Need WORLD XYZ from Camera x/y/depth
Currently using location_3d_to_region_2d within a script to get the screen-space coordinates of each vertex.
I need to do the reverse -- given a Cam and X/Y/depth get X,Y,Z world space.
I've ...
0
votes
0
answers
324
views
How to fix an image texture to object and camera?
I've looked for a similar problem but couldn't find anywhere, so here it goes.
I'm having an issue with fixing the position of this image in the body of the sphere, as you can see, it leaves the ...
- 1
0
votes
2
answers
1k
views
How to get 3D points of a Mesh in world space coordinates? [duplicate]
I have a blender file with this scene (below) seen from the camera.
Now I need to get the 3D points of the mesh (the doughnut) in world space according to the camera perspective, pragmatically. ...
- 103
2
votes
2
answers
590
views
How to set object at a specific depth from the camera, at a certain pixel
I want to set an object at a certain distance (or depth) relative to the camera; and also at a particular pixel.
Example:
I set up a camera at a random position in blender. I want an 1280x720 image. ...
- 183
0
votes
1
answer
123
views
Empties are not transforming
I was following this tutorial https://www.youtube.com/watch?v=K02hlKyoWNI&t=495s for camera to path.
There was a shorcut Alt+G to centre and object. Since I did the same there was some disconnect ...
