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Camera looking down the negative Z-Axis

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Alex Ruiz
Alex Ruiz on 3 Nov 2019
Commented: Alex Ruiz on 8 Nov 2019
I have been trying to use the PlotCamera code to plot a camera using the world coordinate system but it currently only plots in the camera coordinate system.
I essentially want to produce this:
The Camera is looking down the negative Z Direction.
It is commonly used in game developement and in languages like openGL.
I have tried for a long time but I think there is just a limitation in the code since when you pass it the proper inputs it turns out errors.
Please let me know,
Thank you.


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Answers (1)

Qu Cao
Qu Cao on 7 Nov 2019
Edited: Qu Cao on 7 Nov 2019
Hi Alex,
In Computer Vision Toolbox we use the y-down/z-forward camera coordinate systems:
You can convert your coordinates [x1, y1, z1] to the one used in CVT [x2, y2, z2] as follows:
x2 = x1;
y2 =-y1;
z2 =-z1;

  1 Comment

Alex Ruiz
Alex Ruiz on 8 Nov 2019
Hello, I appreciate the responce!
Im using this for a robust application using multiple cameras in different quadrants. Adding the negative sign to the code isnt the best practice, since this code is the ground truth for another project. I am relaying on camera matrix/oriention matrix/translation vectors for position and rendering.
is there any other way?
I have found this to be a huge road block for my research field.

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