文件列表:

CROSS_BILATERAL_FILTER\cross_bilateral_filter.cpp (6241, 2006-11-12)
CROSS_BILATERAL_FILTER\include (0, 2006-11-12)
CROSS_BILATERAL_FILTER\include\array.h (31587, 2006-11-12)
CROSS_BILATERAL_FILTER\include\array_n.h (15915, 2006-11-12)
CROSS_BILATERAL_FILTER\include\chrono.h (4586, 2006-11-12)
CROSS_BILATERAL_FILTER\include\fast_lbf.h (6753, 2006-11-12)
CROSS_BILATERAL_FILTER\include\geom.h (40471, 2006-11-12)
CROSS_BILATERAL_FILTER\include\math_tools.h (30884, 2006-11-12)
CROSS_BILATERAL_FILTER\include\mixed_vector.h (6167, 2006-11-12)
CROSS_BILATERAL_FILTER\include\msg_stream.h (5652, 2006-11-12)
CROSS_BILATERAL_FILTER\Makefile (1903, 2006-11-12)

Table of content ################## 1- How to install 2- How to use 3- The algorithm 4- The code 5- Improving performances 1- How to install ################### a) Requirements --------------- This code has been made and tested under Linux. It should work as well under Windows. b) Compiling ------------ Running 'make' should compile everything out of the box. 2- How to use ############### On the command line, type: ./cross_bilateral_filter input.ppm edge.ppm output.ppm 16.0 0.1 The parameters are: - 'input.ppm': It is an image file in the PPM format. 'convert' from the ImageMagick package makes it easy to produce such files. - 'edge.ppm': It is an image file in the PPM format. 'convert' from the ImageMagick package makes it easy to produce such files. The input intensities will be smoothed according to the edge intensities. Both images must have the same size. - 'output.ppm': It is the image that will be created. The file format is PPM. Software such as Photoshop, Gimp, and xv can read this format. - 16.0: The 1st number is the space sigma in pixels. - 0.1: The 2nd number is the range sigma. The intensity is considered in the [0:1] range. 3- The algorithm ################## Here is the pseudo-code for the algorithm: (a) load a PPM image (b) compute gray levels (c) apply the fast cross bilateral filter (d) save the result image 4- The code ############# The code is in C++. The algorithm described above is in 'truncated_bilateral_bf.cc'. This is the file that you may want to edit. The code follows the description exactly. Comments precede each part. Variable names are long and self-explanatory. You should not need to edit the other files. But in case you want to, here is a short description of each of them. In the 'include' directory: --------------------------- - array.h: Classes for 2D and 3D arrays of values. - array_n.h: Class for nD arrays of values. - fast_lbf.h: Provides a fast color bilateral filter. - math_tools.h: Several useful simple functions. - mixed_vector.h: Provide a class to extend vectors. Useful to add a homongeneous coordinate. - msg_stream.h: C++ streams for warnings and errors. 5- Improving performances ######################### Compiler optimizations can speed up the process a lot. However, the provided makefile does not use any optimization to maximize the chances of successful compilation. For instance, with 'gcc' you may try options such as '-O3' and '-march=pentium4'.

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