Matlab source code for SIBIGRAPI 2020 Submission Bounded biharmonic blending of Möbius transformations for flexible omnidirectional image rectification

System Requirements

• MATLAB 2014a or more recent version
• Image Processing Toolbox
• Optimization Toolbox

Installation instructions

• Clone gptoolbox repository at: https://github.com/alecjacobson/gptoolbox
• Add this folder and subfolders to MATLAB path
• Add gptoolbox folder and subfolders to MATLAB path

Using the User interface

• On Matlab's command window, issue the following command: run biharmonic_interface.m
• Load the image and add the desired handles by left-clicking over the image. Note: some users have experienced misplacement of handles when they click on the image. This problem is solved by maximizing the window.
• To finish a closed cage handle right-click the image
• Press next
• Rectify all lines by clicking in rectify lines or
• Rectify current line by clicking in rectify current line or
• Select control point by clicking over it (including point handle arrows)
• Change control point position by clicking over the image
• Undo the selected control point transformation by clicking in the respective button
• Click save image to generate the final result

This code has been tested in the following settings:

• Linux (Ubuntu 15.10) with Matlab 2014a
• Mac OS (High Sierra) with Matlab 2017a