env_c_math_ops.h

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00001 /*!@file Envision/env_c_math_ops.h Fixed-point integer math versions of some of our floating-point image functions */
00002 
00003 // //////////////////////////////////////////////////////////////////// //
00004 // The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2000-2005   //
00005 // by the University of Southern California (USC) and the iLab at USC.  //
00006 // See http://iLab.usc.edu for information about this project.          //
00007 // //////////////////////////////////////////////////////////////////// //
00008 // Major portions of the iLab Neuromorphic Vision Toolkit are protected //
00009 // under the U.S. patent ``Computation of Intrinsic Perceptual Saliency //
00010 // in Visual Environments, and Applications'' by Christof Koch and      //
00011 // Laurent Itti, California Institute of Technology, 2001 (patent       //
00012 // pending; application number 09/912,225 filed July 23, 2001; see      //
00013 // http://pair.uspto.gov/cgi-bin/final/home.pl for current status).     //
00014 // //////////////////////////////////////////////////////////////////// //
00015 // This file is part of the iLab Neuromorphic Vision C++ Toolkit.       //
00016 //                                                                      //
00017 // The iLab Neuromorphic Vision C++ Toolkit is free software; you can   //
00018 // redistribute it and/or modify it under the terms of the GNU General  //
00019 // Public License as published by the Free Software Foundation; either  //
00020 // version 2 of the License, or (at your option) any later version.     //
00021 //                                                                      //
00022 // The iLab Neuromorphic Vision C++ Toolkit is distributed in the hope  //
00023 // that it will be useful, but WITHOUT ANY WARRANTY; without even the   //
00024 // implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      //
00025 // PURPOSE.  See the GNU General Public License for more details.       //
00026 //                                                                      //
00027 // You should have received a copy of the GNU General Public License    //
00028 // along with the iLab Neuromorphic Vision C++ Toolkit; if not, write   //
00029 // to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,   //
00030 // Boston, MA 02111-1307 USA.                                           //
00031 // //////////////////////////////////////////////////////////////////// //
00032 //
00033 // Primary maintainer for this file: Rob Peters <rjpeters at usc dot edu>
00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Envision/env_c_math_ops.h $
00035 // $Id: env_c_math_ops.h 9830 2008-06-18 18:50:22Z lior $
00036 //
00037 
00038 #ifndef ENVISION_ENV_C_MATH_OPS_H_DEFINED
00039 #define ENVISION_ENV_C_MATH_OPS_H_DEFINED
00040 
00041 #include "Envision/env_types.h"
00042 
00043 #ifdef __cplusplus
00044 extern "C"
00045 {
00046 #endif
00047 
00048         void env_c_lowpass_5_x_dec_x_fewbits_optim(const intg32* src,
00049                                                    const env_size_t w,
00050                                                    const env_size_t h,
00051                                                    intg32* dst,
00052                                                    const env_size_t w2);
00053 
00054         void env_c_lowpass_5_y_dec_y_fewbits_optim(const intg32* src,
00055                                                    const env_size_t w,
00056                                                    const env_size_t h,
00057                                                    intg32* dst,
00058                                                    const env_size_t h2);
00059 
00060         /// Like env_c_lowpass_9_x_fewbits() but uses optimized filter coefficients
00061         void env_c_lowpass_9_x_fewbits_optim(const intg32* src,
00062                                              const env_size_t w,
00063                                              const env_size_t h,
00064                                              intg32* dst);
00065 
00066         /// Like env_c_lowpass_9_y_fewbits() but uses optimized filter coefficients
00067         void env_c_lowpass_9_y_fewbits_optim(const intg32* src,
00068                                              const env_size_t w,
00069                                              const env_size_t h,
00070                                              intg32* dst);
00071 
00072         //! Get min and max values
00073         void env_c_get_min_max(const intg32* src, const env_size_t sz,
00074                                intg32* mini, intg32* maxi);
00075 
00076         //! Saturate values < 0
00077         void env_c_inplace_rectify(intg32* dst, const env_size_t sz);
00078 
00079         void env_c_inplace_normalize(intg32* dst, const env_size_t sz,
00080                                      const intg32 nmin, const intg32 nmax,
00081                                      intg32* actualmin, intg32* actualmax,
00082                                      intg32 rangeThresh);
00083 
00084         /// get the luminance with nbits of precision of the input image
00085         void env_c_luminance_from_byte(const struct env_rgb_pixel* const src,
00086                                        const env_size_t sz,
00087                                        const env_size_t nbits,
00088                                        intg32* const dst);
00089 
00090         /// result = a / val
00091         void env_c_image_div_scalar(const intg32* const a,
00092                                     const env_size_t sz,
00093                                     intg32 val,
00094                                     intg32* const dst);
00095 
00096         /// result += a / val
00097         void env_c_image_div_scalar_accum(const intg32* const a,
00098                                           const env_size_t sz,
00099                                           intg32 val,
00100                                           intg32* const dst);
00101 
00102         /// result = a - b
00103         void env_c_image_minus_image(const intg32* const a,
00104                                      const intg32* const b,
00105                                      const env_size_t sz,
00106                                      intg32* const dst);
00107 
00108 #ifdef __cplusplus
00109 }
00110 #endif
00111 
00112 // ######################################################################
00113 /* So things look consistent in everyone's emacs... */
00114 /* Local Variables: */
00115 /* indent-tabs-mode: nil */
00116 /* c-file-style: "linux" */
00117 /* End: */
00118 
00119 #endif // ENVISION_ENV_C_MATH_OPS_H_DEFINED
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