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Image Cutout CUDA

Building the app

Ensure that the NVIDIA CUDA Toolkit and Make are installed on your machine. Then clone the project and enter the directory using the cd command. Finally, simply run make and the build process should start automatically.

DISCLAIMER: the application has been tested using the CUDA Toolkit 10.2. Therefore, please note that it is not guaranteed to work properly if you are using a different version.

How to use the app

A folder named input has to be present in the same directory of the application. Then simply put the images that have to be processed inside this folder using the following naming patern: frameXXXXX.ppm.

The app will then look for images in the folder by replacing the XXXXX pattern by a number with padding 0 on the left. The app starts from 1 (i.e. frame00001.ppm) and increments this number until no more images following the pattern are found.

The app will place the output images inside an output folder. So please make sure that the input and ouput folders are present in the same directory of the application.

For more details about how to configure the cutout, run ./cutout --help.

Note: for now, only images in the portable pixelmap (PPM) format are supported.

How to use the app for a video

Since a video is a set of images, you can also apply the cutout process on a video. For this simply extrat the different images from a video and place the images in the input folder as explained previously. Then after running the app on these frames, reassemble the images into a video.

To execute this process, you can use ffmpeg for example. To extract the images from an MP4 video for example run the following command:

ffmpeg -i "video.mp4" input/frame%05d.ppm

And the you can recreate the video using this command:

ffmpeg -i output/frame%05d.ppm -c:v libx264 -r 25 -pix_fmt yuv420p -c:a copy -shortest "video_processed.mp4"