Object position detection device and method thereof

A object position detection device comprising:

• at least one image capture unit capturing images of at least one region;
• and
• an image processing unit converting a captured image into one-dimensional distance-axis signal information with an image complexity estimation method, performing numerical differentiation on said one-dimensional distance-axis signal information to obtain a differential value of said one-dimensional distance-axis signal information at a single time point, working out a difference of said one-dimensional distance-axis signal information of at least two adjacent time points, and using said difference of said one-dimensional distance-axis signal information of at least two adjacent time points to determine an approaching status of an object,
• wherein said image complexity estimation method is a regional image entropy estimation method.

A object position detection method comprising:

• capturing images of at least one region;
• converting a captured image into one-dimensional distance-axis signal information with an image complexity estimation method;
• performing numerical differentiation on said one-dimensional distance-axis signal information to obtain a differential value of said one-dimensional distance-axis signal information at a single time point;
• and
• using said differential value of said one-dimensional distance-axis signal information to determine a position of an object,
• wherein said image complexity estimation method is a regional image entropy estimation method.