Variational Framework for Non-Local Inpainting

Build instructions

To compile this code cmake, make and a C99 compiler (ie. gcc) are required. The libraries, libpng, libjpeg and libtiff are optional but WE RECOMMEND THEM.

Compile the binaries by running the following line in the current directory:

$ mkdir build; cd build; cmake ..; make

the process will produce the binary: Inpainting

Usage

Running the program without parameters prints its usage instructions:

$ build/Inpainting

  USAGE:
  ./build/Inpainting input mask output [OPTIONS]
  
  Available options are:
   -depth     Specify depth input
   -method    method name (nlmeans)
   -patch     patch side (9)
   -iters     inpainting iterations (200)
   -scales    scales amount (11)
   -coarse    coarsest rate (0.1)
   -conft     confidence decay time (5)
   -confa     confidence asymptotic value (0.1)
   -lambda    lambda (0.05)
   -lambdar   lambda for RGB channel (only for nldeph method)
   -lambdad   lambda for depth channel (only for nldeph method)
   -init      initialization type [poisson/black/avg/none] (poisson)
   -psigma    Gaussian patch weights (10000)
   -showpyr   PREFIX write intermediate pyramid results
   -shownnf   FILENAME write illustration of the final NNF

Example call:

$ build/Inpainting data/img.png data/mask.png output.png -depth data/depth.png -patch 9 -method nldepth -lambdar 1.0 -lambdad 0.0

Note: lambda ranges in [0..1], specifying the proportion of intensity information over gradient information.

Files and main functions

image.hpp           : FixedImage and Image classes. Image with some defined
                      pixel type (e.g. float, Point, etc.). 
                      The word 'fixed' in the name should be considered as 
                      'immutable', because this class does not provide any 
                      capabilities to modify its data
mask.cpp            : FixedMask and Mask classes. A binary mask container 
mask_iterator.cpp   : STL-like bidirectional input (constant) iterator

point.cpp           : container for 2D coordinates (x, y)
shape.cpp           : container for a 2D rectangular shape (width, height)

a_image_updating.cpp         : abstract class and insances of the image 
patch_non_local_medians.cpp    update step of the algorithm: patch-NLmeans,
patch_non_local_means.cpp      patch-NLmedians, and patch-NLpoisson
patch_non_local_poisson.cpp

a_patch_distance.cpp         : abstract class and instance of the patch
l1_norm_patch_distance.cpp     distances: l1, l2, and gradient-based l2
l2_norm_patch_distance.cpp
l2_combined_patch_distance.cpp

image_inpainting.cpp         : ImageInpainting algorithm 

patch_match.cpp              : PatchMatch algorithm

distance_transform.cpp       : compute the distance function to a set
gaussian_weights.cpp         : compute gaussian weighted patches
gradient.cpp                 : compute image gradients
sampling.cpp                 : up/down-sampling utils for multiscale
io_utility.cpp               : read and write image files
main.cpp                     : main program (see next section)

Main functions

Setup the components of the algorithm and launch the inpainting.

 // setup patchmatch
 Shape  patch_size =  Shape(patch_side, patch_side);
 APatchDistance *patch_distance = new  L2CombinedPatchDistance(lambda, 
                                        patch_size, patch_sigma);
 PatchMatch *patch_match        = new  PatchMatch( patch_distance, 
                                        patch_match_iterations, 
                                        random_shots_limit, -1);
                               
 // setup image update                                
 AImageUpdating *image_updating = new PatchNonLocalPoisson( patch_size, 
                                       patch_sigma, lambda, conj_grad_tol, 
                                       conj_grad_iter);

 // create inpainting object
 ImageInpainting image_inpainting = ImageInpainting(inpainting_iterations,
                                      tolerance,
                                      scales_amount,
                                      subsampling_rate,
                                      confidence_decay_time,
                                      confidence_asymptotic_value,                                       
                                      initialization_type);     // enum

 image_inpainting.set_weights_updating(patch_match);
 image_inpainting.set_image_updating(image_updating);


 // image of type Image, and mask of type Mask
 Image<float> output = image_inpainting.process(input, mask);

Third party components

This software uses the following 3rd party components:

• 3rdparty/iio/ contains Enric Meinhardt's iio library for image input/output: https://github.com/mnhrdt/iio

• 3rdparty/simpois/ contains simpois.c (and other files used by simpois.c) from Enric Meinhardt's image script collection: https://github.com/mnhrdt/imscript

  simpois.c provides a simpler Poisson solver which is used to compute the initial condition in the coarsest scale.

Both 3rdparty components are distributed under the terms of the BSD lincense, see 3rdparty/iio/LICENSE and 3rdparty/simpois/LICENSE.