为什么总是显示我重定义？

大家好！ camera.h:

#ifndef CAMERA_H
#define CAMERA_H

#include "myslam/common_include.h"
#include <myslam/config.h>

/**
 *小孔成像相机模型
 */
 
namespace myslam
{
class Camera
{
public:
    typedef std::shared_ptr<Camera> Ptr;
    //定义相机参数及尺度
    float fx, fy, cx, cy, depth_scale;
    Camera();
    Camera(float fx_, float fy_, float cx_, float cy_, float depth_scale_ = 0);

    Vector3d world2camera(const Vector3d &p_w, const SE3 &Tcw);
    Vector3d camera2world(const Vector3d &p_c, const SE3 &Tcw);
    Vector2d camera2pixel(const Vector3d &p_c);
    Vector3d pixel2camera(const Vector2d &p_p, double depth = 1);
    Vector3d pixel2world(const Vector2d &p_p, const SE3 &Tcw, double depth = 1);
    Vector2d world2pixel(const Vector3d &p_w, const SE3 &Tcw);
};
Camera::Camera(float fx_, float fy_, float cx_, float cy_, float depth_scale_)
    : fx(fx_), fy(fy_), cx(cx_), cy(cy_), depth_scale(depth_scale_) {}

Camera::Camera()
{
    fx = Config::get<float>("camera.fx");
    fy = Config::get<float>("camera.fy");
    cx = Config::get<float>("camera.cx");
    cy = Config::get<float>("camera.cy");
    depth_scale = Config::get<float>("camera.depth_scale");
}
} // namespace myslam

#endif // !CAMERA_H

camera.cpp:

#include <myslam/camera.h>

namespace myslam
{
Vector3d Camera::world2camera(const Vector3d &p_w, const SE3 &Tcw)
{
    //Tcw 是李群
    return Tcw * p_w;
}
Vector3d Camera::camera2world(const Vector3d &p_c, const SE3 &Tcw)
{
    return Tcw.inverse() * p_c;
}
Vector2d Camera::camera2pixel(const Vector3d &p_c)
{
    return Vector2d(fx * p_c(0) / p_c(2) + cx, fy * p_c(1) / p_c(2) + cy);
}
Vector3d Camera::pixel2camera(const Vector2d &p_p, double depth)
{
    return Vector3d((p_p(0) - cx) * depth / fx, (p_p(1) - cy) * depth / fy, depth);
}
Vector3d Camera::pixel2world(const Vector2d &p_p, const SE3 &Tcw, double depth)
{
    return camera2world(pixel2camera(p_p, depth), Tcw);
}
Vector2d Camera::world2pixel(const Vector3d &p_w, const SE3 &Tcw)
{
    return camera2pixel(world2camera(p_w, Tcw));
}

} // namespace myslam

[build] CMakeFiles/myslam.dir/map.cpp.o: In function `myslam::Camera::Camera(float, float, float, float, float)':
[build] /home/bob/CLionProjects/slam14/project/0.1/include/myslam/camera.h:29: multiple definition of `myslam::Camera::Camera(float, float, float, float, float)'
[build] CMakeFiles/myslam.dir/frame.cpp.o:/home/bob/CLionProjects/slam14/project/0.1/include/myslam/camera.h:29: first defined here
[build] CMakeFiles/myslam.dir/map.cpp.o: In function `myslam::Camera::Camera(float, float, float, float, float)':

只要我把这两个 Camera 的构造函数放到 camera.cpp 里定义就不会报错．现在百思不得其解，求教．