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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