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base64 to Mat and Mat to base64

Hi,

I have very poor processing time with base64 image using C++. I don't use third library as boost...

After couple of hour to google search, I use this code to encode and decode image into base 64: http://renenyffenegger.ch/notes/development/Base64/Encoding-and-decoding-base-64-with-cpp

My problem is my processing time is 40ms to decode image in C++, then to compare with php function my processing time is 3ms. I thought C++ were more speed !

Does really don't exist a direct entry for base64 and openCV ?

thx Christophe