Camera looking down the negative Z-Axis

Hello,

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.

Answer 1

[Qu Cao]

Hi Alex,

In Computer Vision Toolbox we use the y-down/z-forward camera coordinate systems:

https://www.mathworks.com/help/vision/gs/coordinate-systems.html#bujxnm2

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;

Thanks,

Qu

[Alex Ruiz]

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.