material_randomizer

Material Randomization

In this example we demonstrate how to switch materials.

Usage

Execute in the BlenderProc main directory:

python run.py examples/material_randomizer/config.yaml examples/material_randomizer/scene.obj examples/material_randomizer/output

• examples/material_randomizer/config.yaml: path to the configuration file with pipeline configuration.
• examples/material_randomizer/scene.obj: path to the object file with the basic scene.
• examples/material_randomizer/output: path to the output directory.

Visualization

Visualize the generated data:

python scripts/visHdf5Files.py examples/material_randomizer/output/*.hdf5

Steps

• Loads scene.obj: loader.ObjectLoader module.
• Creates a point light: lighting.LightLoader module.
• Sets two camera positions: camera.CameraLoader module.
• Selects materials based in the: manipulators.EntityManipulator module.
• Renders rgb: renderer.RgbRenderer module.
• Writes the output to .hdf5 containers: writer.Hdf5Writer module.

Config file

Entity Manipulator

    {
      "module": "manipulators.EntityManipulator",
      "config": {
        "selector": {
          "provider": "getter.Entity",
          "conditions": {
            "type": "MESH"
          }
        },
        "cf_randomize_materials": {
          "randomization_level": 0.5
        }
      }
    },

The focus of this example is the fucntionality of the manupulators.EntityManipulator module, which allows us to change the material of the objects randomly.

• Sets the randomization_level to 0.5, which means that a material has the change of 0.5 to be replaced with another one.

Select the pool of objects for which we randimize materials with certain probability, and select material substitute. If no getter.Material is called, a random material from all of the materials will be used as substitution.

Check object_manipulation for more information about selectors.

Check the scenenet_with_cctextures for a more advanced example of the MaterialManipulator.

More examples

• camera_sampling: More on sampling for cameras.
• light_sampling: More on sampling for lights.