現象： VS2010編譯運行時出錯，
1>f:\test-dev\imagetest\imagetest\imagetest.cpp(41): error C2668: “log”: 對重載函數的調用不明確
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(575): 可能是“long double log(long double)”
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(527): 或 “float log(float)”
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(120): 或 “double log(double)”
1> 嘗試匹配參數列表“(int)”時
1>f:\test-dev\imagetest\imagetest\imagetest.cpp(42): error C2668: “log”: 對重載函數的調用不明確
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(575): 可能是“long double log(long double)”
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(527): 或 “float log(float)”
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(120): 或 “double log(double)”
1> 嘗試匹配參數列表“(int)”時
1>f:\test-dev\imagetest\imagetest\imagetest.cpp(43): error C2668: “log”: 對重載函數的調用不明確
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(575): 可能是“long double log(long double)”
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(527): 或 “float log(float)”
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(120): 或 “double log(double)”
1> 嘗試匹配參數列表“(int)”時
解決方案：
使用double或float類型進行轉換，如下：
imageLog.at<Vec3f>(i, j)[0] = log(double(1 + image.at<Vec3b>(i, j)[0]));