Rectified linear主要是通过类RectifiedLinear来实现的，该类继承自AbstrcactActivation类，主要实现Activating接口和Derivating接口。

RectifiedLinear类的定义如下：

#ifndef RECTIFIEDLINEAR_H
#define RECTIFIEDLINEAR_H
 
#include "abstractactivationfunction.h"
 
 
 
 
/**
 * @brief The RectifiedLinear class used to calculate the rectified linear
 *        activation function.
 *
 * @author sheng
 * @date  2014-07-23
 * @version 0.1
 *
 * @history
 *     <author>       <date>         <version>        <description>
 *      sheng       2014-07-23          0.1         build the class
 *
 */
class RectifiedLinear : public AbstractActivationFunction
{
    public:
        RectifiedLinear();
 
        cv::Mat Activating(const cv::Mat &InputMat);
        cv::Mat Derivating(const cv::Mat &InputMat);
};
 
#endif // RECTIFIEDLINEAR_H

函数的定义如下：

#include "rectifiedlinear.h"
 
/**
 * @brief The default constructor.
 *
 * @author sheng
 * @version 0.1
 * @date 2014-07-23
 *
 * @history
 *     <author>       <date>         <version>        <description>
 *      sheng       2014-07-23          0.1         build the function
 */
RectifiedLinear::RectifiedLinear()
{
}
 
 
 
 
 
 
/**
 * @brief Calculating the rectified linear of the inputmat.
 * @param InputMat  The input mat
 * @return the result of rectifiedlinear(inputmat), whose size is the same of the
 *         InputMat.
 *
 *
 * @author sheng
 * @version 0.1
 * @date 2014-07-23
 *
 * @history
 *     <author>       <date>         <version>        <description>
 *      sheng       2014-07-23          0.1         build the function
 *
 */
cv::Mat RectifiedLinear::Activating(const cv::Mat &InputMat)
{
    // convert to float mat
    cv::Mat FloatMat = ConvertToFloatMat(InputMat);
 
 
 
    // calculate the rectified linear
    cv::Mat Result;
    cv::threshold(FloatMat, Result, 0.0, 255, cv::THRESH_TOZERO);
 
 
    return Result;
 
}
 
 
 
 
 
 
 
/**
 * @brief Calculating the derivative of the rectifiedlinear.
 * @param InputMat  The input mat
 * @return the result of the derivative of the rectifiedlinear, whose size is
 *         the same of the InputMat.
 *
 *
 * @author sheng
 * @version 0.1
 * @date 2014-07-23
 *
 * @history
 *     <author>       <date>         <version>        <description>
 *      sheng       2014-07-23          0.1         build the function
 *
 */
cv::Mat RectifiedLinear::Derivating(const cv::Mat &InputMat)
{
    // convert to float mat
    cv::Mat FloatMat = ConvertToFloatMat(InputMat);
 
 
    // calculate which element of the mat is bigger or equal to zero.
    cv::Mat TmpResult = FloatMat >= 0.0;
 
 
    // calculate the derivate of the rectified linear
    cv::Mat Result = TmpResult & 1;
 
 
    return Result;
}