polyscope set tone mapping python,Polyscope Set Tone Mapping: A Detailed Guide for Python Users

Polyscope Set Tone Mapping: A Detailed Guide for Python Users

Are you a Python user looking to enhance the visual appeal of your projects with tone mapping? Tone mapping is a technique used in computer graphics to convert the range of luminance values from one set of images (usually high dynamic range, or HDR) to another set (usually standard dynamic range, or SDR). In this guide, I’ll walk you through the process of setting up tone mapping in Polyscope using Python.

Understanding Tone Mapping

Tone mapping is essential for rendering HDR images on devices with limited display capabilities, such as standard monitors and televisions. It helps to compress the wide range of luminance values in HDR images into a range that can be displayed on SDR devices without causing clipping or loss of detail.

There are several tone mapping algorithms available, each with its own strengths and weaknesses. Some popular algorithms include logarithmic, logarithmic squared, and Reinhard tone mapping. In this guide, we’ll focus on setting up the Reinhard tone mapping algorithm in Polyscope using Python.

Setting Up Polyscope

Before you can start setting up tone mapping in Polyscope, you need to have it installed on your system. Polyscope is a free, open-source tool for rendering and analyzing 3D scenes. You can download it from the official website: https://polyscope.run.

Once you’ve downloaded and installed Polyscope, you’ll need to set up a Python environment. If you haven’t already, install Python and the necessary libraries, such as NumPy and Matplotlib, using pip:

pip install numpy matplotlib

Creating a Basic Scene

Now that you have Polyscope and the necessary libraries installed, let’s create a basic scene to apply tone mapping to. We’ll use a simple sphere as our scene’s subject. Here’s a sample Python script to create a basic scene:

import polyscope as ps Create a new scenescene = ps.new_scene() Add a sphere to the scenesphere = ps.add_sphere(scene, center=[0, 0, 0], radius=1.0) Render the sceneps.render(scene)

Applying Tone Mapping

Now that we have a basic scene, let’s apply tone mapping to it. We’ll use the Reinhard tone mapping algorithm, which is available in the Polyscope Python API. Here’s how to apply it:

import polyscope as ps Create a new scenescene = ps.new_scene() Add a sphere to the scenesphere = ps.add_sphere(scene, center=[0, 0, 0], radius=1.0) Set the tone mapping algorithm to Reinhardtone_mapping = ps.new_tone_mapping(scene, algorithm='reinhard') Apply the tone mapping to the sceneps.apply_tone_mapping(scene, tone_mapping) Render the sceneps.render(scene)

Customizing Tone Mapping Parameters

The Reinhard tone mapping algorithm has several parameters that you can adjust to achieve the desired visual effect. Here’s a table summarizing the available parameters:

Here’s an example of how to adjust the tone mapping parameters:

import polyscope as ps Create a new scenescene = ps.new_scene() Add a sphere to the scenesphere = ps.add_sphere(scene, center=[0, 0, 0], radius=1.0) Set the tone mapping algorithm to Reinhardtone_mapping = ps.new_tone_mapping(scene, algorithm='reinhard') Set the tone mapping parameterstone_mapping.set_luminance(0.5)tone_mapping.set_contrast

        
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