Image transformation: I have a .xyz file which contains x, y, z coordinates and r, g, b. I have to do a translation, rotation and z shift on each of these coordinates.

I am struggling with the following (1) Using the .xyz file to generate an image (2) applying different values of translations on each of the x y and z coordinates.

Please let me know if you can help!

[Walter Roberson]

Does the xyz file define a full 3d grid or does it define scattered points?

If it defines scattered points then how big is the influence of each point? Should they be treated as little cubes and everywhere not defined should be nan, or should they be treated like light sources that influence the surrounding voxels?

[Ripul Dutt]

Hey, it defines scattered points, the data is from LiDAR. I am trying to shift the origin of the points from scanner to some other point of origin in the 3D space. Is it possible to do the transformation without first converting it to a matrix ? my choice of words might seem naive I am very new to matlab

thanks!

[Walter Roberson]

If you are just doing translations, then just add or subtract the appropriate amount from each coordinate. If you are doing rotations as well, then that can work on the coordinates without you having to form an image: create the appropriate transformation matrix and do the matrix multiplications.

[Ripul Dutt]

Thanks that worked!!