Simple ISP preview

Applicable for

This article explains how to use the Simple ISP preview application for launching a simple preview with ISP running for a better image quality rendering.

1. Description[edit | edit source]

The Simple ISP preview application is a part of the X-LINUX-ISP Expansion package. It is a simple python application that allows to stream a camera and to display a preview with ISP enabled and 2A algorithms running.

The application demonstrates how to prototype a simple Gstreamer pipeline to stream camera frames (using libcamerasrc) and to display a preview on screen (using gtkwaylandsink). Libcamera IPA is used to configure and enable the DCMIPP ISP algorithms for auto-exposure (AE) and auto-whitebalance (AWB).

2. Installation[edit | edit source]

2.1. Install from the OpenSTLinux ISP package repository[edit | edit source]

Warning

The software package is provided AS IS, and by downloading it, you agree to be bound to the terms of the software license agreement (SLA0048). The detailed content licenses can be found here.

After having configured the OpenSTLinux ISP package you can install the X-LINUX-ISP packages that contains the Simple ISP preview application:

To install this application, please use the following command:

 x-linux-isp --install simple-isp-preview-python

Then, restart the demo launcher:

 systemctl restart weston-graphical-session.service

2.2. Source code location[edit | edit source]

in the OpenSTLinux Distribution with X-LINUX-ISP Expansion Package:

<Distribution Package installation directory>/layers/meta-st/meta-st-x-linux-isp/recipes-samples/files/simple-isp-preview

on GitHub:

recipes-samples/files/simple-isp-preview

2.3. Regenerate the package from OpenSTLinux Distribution (optional)[edit | edit source]

Using the OpenSTLinux Distribution, you are able to rebuild the application.

Set up the build environment:

 cd <Distribution Package installation directory>
 source layers/meta-st/scripts/envsetup.sh
 Be careful to select the right board in the script to setup the correct environment

Rebuild the application on STM32MP2x:

 bitbake simple-isp-preview-python -c install

The generated package is available here:

<Distribution Package installation directory>/<build directory>/tmp-glibc/work/cortexa35-ostl-linux/simple-isp-preview-python/5.0.0-r0/image

3. How to use the application[edit | edit source]

3.1. Launching via the demo launcher[edit | edit source]

You can click on the icon to run the application.

3.2. Executing with the command line[edit | edit source]

The Simple ISP preview Python application is located in the userfs partition:

/usr/local/x-linux-isp/simple-isp-preview

Run the application by executing the following script:

/usr/local/x-linux-isp/simple-isp-preview/launch_python_simple_isp_preview_app.sh