Title :
RGBN Image Editing
Author :
Pereira, Thiago ; Velho, Luiz
Author_Institution :
Visgraf Lab., IMPA-Inst. de Mat. Pura e Aplic., Rio de Janeiro, Brazil
Abstract :
We propose a method to edit RGBNs (images with a color and a normal channel). High resolution RGBNs are easy to obtain using photometric stereo. Free editing will result in normals which do not correspond to any realizable surface. Our normal operators guarantee the integrability of the results. Our method can filter normals with any linear kernel allowing high-pass and edge-enhancement filters. We have designed a normal linear combination method for adding details with frequency control. New geometric features can be created with a custom brush that warps deformations along its path. A nonlinear operator is also proposed. Its integrability is controlled with a two-band separation of frequencies: smooth shape and details.
Keywords :
edge detection; feature extraction; high-pass filters; image colour analysis; image enhancement; image reconstruction; image resolution; RGBN image editing; edge-enhancement filter; frequency control; geometric features; gradient reconstruction; high resolution RGBN; high-pass filter; image color; linear kernel; nonlinear operator; photometric stereo; Cameras; Computer graphics; Filtering; Frequency; Image processing; Image reconstruction; Laboratories; Nonlinear filters; Shape control; Surface reconstruction; RGBN; deformation; filtering; gradient reconstruction; normal map; normal processing;
Conference_Titel :
Computer Graphics and Image Processing (SIBGRAPI), 2009 XXII Brazilian Symposium on
Conference_Location :
Rio de Janiero
Print_ISBN :
978-1-4244-4978-1
Electronic_ISBN :
1550-1834
DOI :
10.1109/SIBGRAPI.2009.28
