Inpainting

Inpainting is a method of image processing, which attempts to reconstruct lost or destroyed parts of an image. The goal is to produce a revised image of which the viewer can not recognize that changes have been made.

Areas of application

Reconstruction of missing parts of the image

Old pictures may have cracks or individual parts completely missing. With the help of inpainting in the missing parts of the image can be reconstructed.

Removing Objects

When removing objects or people from a picture is the only user input required to receive a mark on the object to be removed. Then, the object is automatically replaced. The main difficulty is to draw the background as steadily as possible in color and texture in the area to be filled.

Image compression

Inpainting can also be used as image compression. To achieve a compression of the pixel blocks erased. Relatively many blocks are deleted in areas consistent texture and along edges of a few, so that the edge profile is not lost. After the reconstruction of the deleted blocks no quality loss compared to a JPEG compression is visible.

Origin

All methods that deal with image inpainting, based on the craft of reconstructors. This is an old profession which is mainly exercised by Restoration. The process of inpainting is called, is the successive continue the edge information in the image interior in ( gap fill ). Reconstructors go by doing the following:

Most digital algorithms using partially this procedure.

Algorithms

Structural inpainting is focused on the reconstruction of the structure and edges in the missing part of the picture. One of the most important structural inpainting methods is PDE. The algorithm extended lines of equal gray values ​​( isophote lines ) at the edge iteration in the area to be filled into it. Then ink is drawn into the image area to be filled. There are also some other approaches such as the Navier-Stokes fluid flow method.

While Textural inpainting only focused on the reconstruction of the texture, patterns and textures can be reconstructed with the combined structural and textural inpainting.

With image-based rendering approaches are called for image synthesis, where the geometrical modeling phase will be replaced by an image recording process. Since on images never all information of a three-dimensional object can be imaged, an inpainting is introduced step that reconstructs missing information as accurately as possible.

Swell

  • Image processing
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