文件列表:

COLOR_BILATERAL_FILTER\color_bilateral_filter.cpp (5008, 2006-11-12)
COLOR_BILATERAL_FILTER\include (0, 2006-11-12)
COLOR_BILATERAL_FILTER\include\array.h (31587, 2006-11-07)
COLOR_BILATERAL_FILTER\include\array_n.h (15915, 2006-11-12)
COLOR_BILATERAL_FILTER\include\chrono.h (4582, 2006-11-12)
COLOR_BILATERAL_FILTER\include\fast_color_bf.h (7853, 2006-11-12)
COLOR_BILATERAL_FILTER\include\geom.h (40471, 2006-11-07)
COLOR_BILATERAL_FILTER\include\math_tools.h (30884, 2006-11-07)
COLOR_BILATERAL_FILTER\include\mixed_vector.h (6169, 2006-11-12)
COLOR_BILATERAL_FILTER\include\msg_stream.h (5652, 2006-11-07)
COLOR_BILATERAL_FILTER\Makefile (1903, 2006-11-07)

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: ./color_bilateral_filter input.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. - '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 RGB channels are 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 bilateral filter (d) save the result image 4- The code ############# The code is in C++. The algorithm described above is in 'color_bilateral_filter.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_color_bf.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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