KR200316081Y1 - The CCTV camera for vehicle detection using the raw data of image pick-up device. - Google Patents

Abstract

The present invention relates to a method of implementing a CCTV camera for a built-in image detector for measuring traffic information with an image signal, and the conventional product is a "vehicle speed" and "vehicle number" for a fully processed "image signal" Although the same "traffic information" was measured, the present invention applies a new algorithm to measure "vehicle speed" and "vehicle number" for "raw data", which is a step before image signal processing, and generates "image signal". The present invention relates to a method for simplifying the structure and performance of a "signal processing unit" for eliminating deterioration due to image conversion and improving the price structure.

Description

CTV camera for traffic information measurement using raw data of image pickup device {The CCTV camera for vehicle detection using the raw data of image pick-up device. }

1. Technical Field

CCTV camera with built-in video detection function that measures "traffic" information using the image information in the image signal.

-Image Detector, Vehicle detection System using Image

-ITS (Intelligent Traffic System)

2. Prior art

As shown in FIG. 1, the prior art and products generate an electrical signal "raw data" generated from the "imager" of 1) as a "image signal" recognizable by the "image processor" of 2). For this purpose, "image detection" function for measuring traffic information such as "vehicle speed" and "vehicle number" is implemented.

3. Problems of the prior art

The accuracy of "image detection" requires high resolution and high frame rate, so the "image generation signal processing part" of 2) becomes bigger in the product, resulting in lower performance or price increase. The "image signal" is not necessarily required for "image detection", and the "image detection" function can be implemented only by the "raw data" obtained from the image pickup device, which is a wasteful factor. The raw data of the can be distorted or deteriorated, reducing the accuracy of the detection.

This is because most of the developments and studies of the "image processing apparatus and method" have been directed only to the "completely generated image signal", and the result of the "image processing" using raw data is hardly achieved.

1. It improves the price structure and processing performance of the entire system by eliminating or simplifying the existing "image generation signal processing unit".

2. By applying a new "image detection algorithm" for "raw data" obtained from an image pickup device, image quality deterioration is minimized and processing performance is improved.

1. FIG. 1 is a conventional technology and product, which processes raw data, which is an electrical signal obtained from an image pickup unit, of 1) by a signal processing unit for image generation to generate a complete image signal. Performs the function of the "image detection unit" such as traffic information measurement to output the results to the outside or to transmit or display the "image signal" as needed.

2. FIG. 2: Performs "basic processing" such as A / D conversion or Gamma transform that changes linearity of raw data obtained from "photographer" according to the present invention, and then measures traffic information using "image detection algorithm" different from the conventional method. Performs the "image detection" function, and the "image generation signal processing unit" transmits or displays the "image signal" that is the result obtained by performing the function at a lower frequency and resolution than the "image detection unit".

See FIG. 2

The role of each part will be described sequentially.

The "image part" of 6) has the same structure as the conventional "image part" 1), and is mainly composed of an image pickup device of CCD and CMOS, a lens and a peripheral control circuit to convert the "light signal" into an "electric signal" and output it. It plays a role. The "electric signal" generated and output in this way is the "raw data" of the imaging device.

The "basic processing part" of 7) performs "A / D conversion" which converts an analog signal into a digital signal so that the raw data can be processed by a signal. If necessary, the Gamma transformation can be performed here.

Unlike the "image detection part" of 3) which targets a complete "image signal", the "image detection part" of 8) applies the algorithm different from the existing algorithm which targets the signal which performed only "basic processing" by 7). Perform the function of "Traffic Measurement".

10) performs the same function as the conventional one to output the "image detection" result thus processed.

Unlike the conventional " image generating signal processing unit " such as 2) in which the " raw data processing unit " of the imaging unit generates all of the " raw data " as it is, the " image generating signal processing unit " An image signal is generated for a signal obtained by basically processing the raw data of the "imaging element". This is because the performance (resolution and frame rate) of the image required for "transfer and display" is relatively inferior to the "image detection" function.

"Transfer / display" section 11) transmits the generated image signal to the outside or displays it on a monitor.

In the conventional structure, since all the "raw data" of the "imaging part" are unconditionally "image signal" to perform the "image detection" function, there was an unnecessary waste and "performance deterioration" due to deterioration of image quality. Since the "signal processing unit for image generation" is simplified or eliminated, the price structure of the system is improved and processing performance is improved. In addition, since the "image detection algorithm" for "raw data" of the image pickup device before image quality deterioration and deformation occurs, processing performance is improved.

Claims (2)

Combined with a lens, the optical signal is converted into an electrical signal, and the electrical signal is generated as an image signal. In An imaging unit 6 including an imaging device for converting an optical signal into an electrical signal and outputting the result in a constant form; A basic processor (7) for converting the signal of the imaging unit (6) into digital and performing linearity conversion such as Gamma conversion; An image detecting unit (8) for performing traffic information measurement on the data converted by the basic processing unit (7) rather than a complete image signal; An image generation signal processor 9 for generating an image signal having a lower resolution or a lower frame rate than the image signal used by the image detection unit 8; A CTV camera for measuring traffic information which performs the function of the image detecting unit 8 on the raw data subjected to the basic processing (7) of the image capturing unit (6) rather than a complete image signal. The method of claim 1. The CTV camera for measuring traffic information which performs the "image generation signal processing part" (9) for the resolution used in the image detection unit (8) and a resolution lower than the number of frames per second and the number of frames.