Image Resizing by Seam Carving algorithm.
Some non-square pictures don't fit SNS profile portraits, and they need to be resized. Seam Carving technique resizes images preserving important features, unlike rescaling or cropping.
Demo movie -> https://youtu.be/alv-BUySOPs
- macOS Catalina 10.15.5
- Java OpenJDK 13.0.2
- OpenCV 4.3.0
install Java OpenJDK 13.0.2
# install Homebrew (if needed)
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
# update packages, install cask, and allow cask to look up versions
brew update
brew tap homebrew/cask
brew tap homebrew/cask-versions
# install Java
brew cask install javaFirst, compile files with the following command
$ javac -classpath .:./opencv4/library/opencv-430.jar image/*.java
then, run the main file. You can input any aspect ratio (width:height).
$ java -Djava.library.path=./opencv4/library -classpath .:./opencv4/library/opencv-430.jar: image.Main [filename] [width] [height]
In the pop-up window titled "Drag regions you want to preserve.", you can manually select partial image areas to protect or destroy by dragging them.
You can change your curcor size and protect/destroy mode by typing the following commands in the command line. (default; medium/protect)
| Commands | Functions |
|---|---|
| s | small cursor size |
| m | medium cursor size |
| l | large cursor size |
| + | protect mode |
| - | destroy mode |
When you finish selecting protect/destroy regions, click Enter-key in the command line.
Once the program has sucessfully run, the input image will be resized with the aspect ratio you entered.
You can save it from "File->Save" tab at the top of the image window.
If you want to see how the algorithm works, checkout to the demo commit node and recompile files and rerun the program.
$ git checkout demo
$ javac -classpath .:./opencv4/library/opencv-430.jar image/*.java
$ java -Djava.library.path=./opencv4/library -classpath .:./opencv4/library/opencv-430.jar: image.Main [filename] [width] [height]