vcglib: img_info.h Source File

00001 #ifndef IMG_INFO_H_
00002 #define IMG_INFO_H_
00003 
00004 // functions that extrapolate information from read-only images
00005 
00006 namespace img {
00007 
00008 template<int Channels,typename ScalarType, bool Safe>
00009 inline ScalarType minValue(const Image<Channels,ScalarType,Safe> &image)
00010 {
00011   assert(image.isValid());
00012   if(Safe){
00013     if(!image.isValid())  throw ImageException("Invalid image");
00014   }
00015   ScalarType* array = image.dataValues();
00016   int length =image.dataValuesSize();
00017 
00018   ScalarType min = array[0];
00019   for(int offset=0;offset<length;offset++)
00020     if(min > array[offset])
00021       min = array[offset];
00022   return min;
00023 }
00024   
00025 template<int Channels,typename ScalarType, bool Safe>
00026 inline ScalarType maxValue(const Image<Channels,ScalarType,Safe> &image)
00027 {
00028   assert(image.isValid());
00029   if(Safe){
00030     if(!image.isValid())  throw ImageException("Invalid image");
00031   }
00032   ScalarType* array = image.dataValues();
00033   int length =image.dataValuesSize();
00034 
00035   ScalarType max = array[0];
00036   for(int offset=0;offset<length;offset++)
00037     if(max < array[offset])
00038       max = array[offset];
00039       
00040   return max;
00041 }
00042 
00043 } //end namespace img
00044 
00045 #endif /*IMG_INFO_H_*/