Method and system for calculating image recognition rate and embedded image processing system

A system for calculating image recognition rate, comprising:

• an image controlling apparatus, capable of outputting a frame according to a control signal;
• a first signal interface electrically connected to the image controlling apparatus, used for transmitting the frame;
• an embedded image processing system, electrically connected to the first signal interface so as to receive the frame, used for performing an image recognition operation upon the frame and thus generating a recognition result for the received frame while generating the control signal;
• a second signal interface, electrically connected to the embedded image processing system and the image controlling apparatus, used for receiving the recognition result and the control signal while transmitting the control signal and the recognition result to the image controlling apparatus where the recognition result is used as a basis for calculating an image recognition rate,
• wherein the recognition result should contain sufficient parameters capable of defining position of the target object in a reference coordinate system;
• and
• wherein in a condition that the target object is selected to be lane lines, the reference coordinate system is selected to be a Cartesian coordinate system and the parameters containing in the recognition result are defined as the slopes and the interceptions relating to a left lane line and a right lane line of the same lane.

A method for calculating image recognition rate, comprises the steps of:

• enabling an image controlling apparatus to output a frame in a set of frames to an embedded image processing system;
• enabling the embedded image processing system to receive the frame so as to perform an image recognition operation upon the received frame;
• enabling the image processing system to issue a control signal and a recognition result as well after completing the image recognition operation;
• enabling the image controlling apparatus to output another frame in a set of frames to the embedded image processing system according to the control signal and the recognition result;
• repeating the aforesaid steps for a plurality of times for generating a plurality of recognition results in correspondence to the plural image recognition operations performed during the repeating for recognizing each and every frame in the set of frames;
• calculating an image recognition rate relating to a target object in the set of frames according to the recognition results from the embedded image processing system;
• and
• optimizing parameters used in the recognition logic of the embedded image processing system according to the image recognition rate, comprising:
• altering the parameters used in the recognition logic of the embedded image processing system while obtain image recognition rates in correspondence to the set of frames with the altered parameters;
• and
• selecting the parameters whose corresponding image recognition rate is the largest to be the optimal recognition parameters for the embedded image processing system,
• wherein the parameters can be defined as the threshold value of a bi-level thresholding for image recognition, contrast, brightness and the combination thereof.