Depth of Field

This project emulates the lens effect "depth of field" with an Intel Realsense depth sensor and OpenGL shaders.

Run

Download the latest release. Connect your supported Intel Realsense device and run dof.exe.

Camera must have depth and RGB. All my testing was done on a used D435 I got for like $160 in 2023. I also reccommend using the Realsense viewer to calibrate the camera, if you haven't already done so.

Keypress	Action
q	Exit application
w	Increase focus distance
s	Decrease focus distance
e	Increase focal width
d	Decrease focal width
r	Increase blur intensity
f	Decrease blur intensity

Note that the depthbuffer is dynamically scaled between the maximum and minimum distance sensed (kind of like how a thermal camera does). This behavior should probably be changed but I haven't done it yet.

The width also depends on these values so will be dynamic based on the camera's perception.

Build

Its a cmake project. You need to have the realsense api installed, and also you need to install an openGL handler. See the cmakelists.txt file for details. TODO: document this more. Also make it multi platform.

History

Read the full blog post if you want to know more.

Impossible f0.3 lens

Acerola's video on video game depth of field

Acerola's code repo

Notes for Development

OpenCV

https://github.com/opencv/opencv.git

https://docs.opencv.org/4.x/d7/d9f/tutorial_linux_install.html

https://github.com/marketplace/actions/setup-opencv

https://github.com/Dovyski/setup-opencv-action/blob/master/index.js

wait actually. you can just ask cmake to find your system install of opencv-which is i think simpler?

C:\tools\opencv\build\x64\vc16\lib
C:\tools\opencv\build\x64\vc16\bin

cmake -S opencv -B opencv/build

make -j10 -C opencv/build

make -C opencv/build install --prefix ./fob/include

Realsense

https://github.com/IntelRealSense/librealsense.git

https://github.com/zivsha/librealsense/blob/getting_started_example/examples/getting-started/CMakeLists.txt

C:\Program Files (x86)\Intel RealSense SDK 2.0\lib
C:\Program Files (x86)\Intel RealSense SDK 2.0\include

OpenGL

Maybe need to get openGL tests but its possible itll build without it

https://amiralizadeh9480.medium.com/how-to-run-opengl-based-tests-on-github-actions-60f270b1ea2c

C:\tools\glew-2.1.0\include\GL
C:\tools\glew-2.1.0\lib\Release\x64
C:\tools\glew-2.1.0\bin\Release\x64

https://cmake.org/cmake/help/latest/variable/CMAKE_INSTALL_PREFIX.html

https://learnopengl.com/Getting-started/Hello-Triangle

https://learnopengl.com/Getting-started/Shaders

https://github.com/nothings/stb/blob/master/stb_image.h

https://learnopengl.com/In-Practice/2D-Game/Postprocessing

HLSL Cross compile

Look into it.