CN207503284U

CN207503284U - Image Edge-Detection system

Info

Publication number: CN207503284U
Application number: CN201721487229.8U
Authority: CN
Inventors: 张庆辉; 万晨霞
Original assignee: Zhengzhou Aiyi Electronic Technology Co Ltd
Current assignee: Zhengzhou Aiyi Electronic Technology Co Ltd
Priority date: 2017-11-09
Filing date: 2017-11-09
Publication date: 2018-06-15
Anticipated expiration: 2027-11-09

Abstract

The utility model discloses a kind of Image Edge-Detection systems, it is intended to solve the technical issues of existing edge-detected image is unintelligible, detection efficiency is low, performance is unstable and cost is higher.The utility model includes image capture module, image storage module, image processing module, image display；Image capture module acquisition image information is delivered to image storage module and image processing module, and by treated, image data is exported to image display image processing module；Image processing module includes the fpga chip containing Canny operators, and fpga chip has powerful parallel processing capability, while has good portable and versatility；Canny algorithm detection image edge clears and good operating stability；The utility model combines the advantage of the two well, and advantage is：Detection efficiency is high, detection image is clear, performance is stable and at low cost easy to spread.

Description

Image Edge-Detection system

Technical field

The utility model is related to technical field of image processing, and in particular to a kind of Image Edge-Detection system.

Background technology

Image procossing is a most popular field of current engineering field, but edge is past during image is handled Past unintelligible, there are the problems such as noise and wide edge, these problems result in being difficult to for image information, cause rear It also needs to handle source image data in continuous use, increases the difficulty to image procossing, and time-consuming.Therefore, such as What is detected image border the most important thing for becoming image procossing, and Image Edge-Detection is in image measurement, image Equally there is very important effect in segmentation, compression of images, image identification and pattern-recognition.

Image Edge-Detection refers to the process of target edges in a kind of positioning two dimension or 3-D view, Image Edge-Detection Purpose is to find the set that the violent pixel of brightness change in image is formed, and the form of expression is often profile.Image Mathematic(al) manipulations, this mathematic(al) manipulations such as edge detection needs integrate detected image data, differential, convolution are referred to as Operator.Operator is written by program means in computer processor, and the processor price currently used for Image Edge-Detection is held high Expensive, cost is higher and stability is insufficient, and built-in operator also tends to be not achieved in terms of the efficiency and clarity of processing image It is required that.

Invention content

The technical problems to be solved in the utility model be Image Edge-Detection is unintelligible, detection efficiency is low, working performance not Stablize and cost is higher.

In order to solve the above technical problems, the utility model adopts the following technical solution：

Design a kind of Image Edge-Detection system, including image capture module, image storage module, image processing module, Image display；Image capture module acquisition image information is delivered to image storage module and image processing module, at image Managing module, image data is exported to image display by treated；Image processing module includes containing Canny operators Fpga chip, fpga chip have powerful parallel processing capability, while have good portable and versatility；Canny Algorithm detection image edge clear and good operating stability.

Preferably, the model of fpga chip：Cyclone IV-EP4CE16F17C8.

Preferably, image capture module includes CMOS camera 0V7670, to realize the acquisition to spatial image, adopts Collection rate and the resolution ratio of output image can freely be set.

It is further preferred that image capture module further includes SCCB functional units, CAMERA control units, CAMERA functions Unit and CAMERA storage units；SCCB functional units by similar I2C agreements when program process matching camera OV7670 It puts parameter to be dealt into the register specified, completes the transmission and write-in of data, initial configuration work is carried out to camera； CAMERA control units are to specify related register address and data in register through SCCB buses write-in camera, are come with this Complete the configuration work to camera；By be combineding with each other for SCCB functional units and CAMERA control units, can realize pair The configuration work of camera collection image resolution ratio, output format, pixel clock etc.；CAMERA functional units are to pass through camera The output timing of OV7670 completes the collecting work to image information；The main function of CAMERA storage units is by camera The image collected information carries out interim caching, so that following functional element continual can read figure from the unit As information.

Preferably, image storage module includes SDRAM chips, to realize the storage to image data, mainly realizes Image data is kept in；The model HY57V2562GTR of the chip, capacity：256M, bus bit wide：16.

It is further preferred that image storage module further includes SDRAM control modules and SDRAM function modules；SDRAM is controlled Molding root tuber completes the control to SDRAM function modules according to initialization operation, refresh operation, write operation and reading behaviour's command set, Realize the storage to Image Acquisition information.

Preferably, image display includes the VGA displays of RGB16 specifications, can show 65536 kinds of colors, to The edge-detected image information of image processing module is passed through in display.

It is further preferred that image display further includes VGA storage units and VGA functional units；VGA functional unit controls VGA displays processed make it and corresponding image are shown according to VGA displaying principles and defined sequential；VGA storage units it is main Function is the cushioning effect played to image data；By VGA displaying principles and the operation principle of SDRAM storage chips it is found that VGA Can not data be read from SDRAM at any time to be shown, therefore need in advance to cache a line image information in the design So as to image display can be at any time be read out display.

Compared with prior art, the advantageous effects of the utility model are：

1. the utility model execution efficiency is high, detection edge image is clear；FPGA platform has outstanding parallel processing energy Power can accelerate the process of image procossing, improve efficiency；Canny algorithms can play filters out interference well, obtains clearly Edge detecting information；FPGA platform and the advantage of Canny algorithms are combined by the utility model well, can efficiently be examined Measure clearly image edge information.

2. the utility model stability is high, using the design method of sub-module, avoid interfering with each other between each function module, It not only contributes to improve detection efficiency, and stability is also improved significantly.

3. the utility model is at low cost, the lower FPGA platform of price is carried, cost is cut down, is conducive to promote the use of.

Description of the drawings

Fig. 1 is the utility model Image Edge-Detection system hardware platform overall structure principle schematic；

Fig. 2 is the utility model image capture module illustrative view of functional configuration；

Fig. 3 is the utility model image storage module illustrative view of functional configuration；

Fig. 4 is the utility model figure image display illustrative view of functional configuration.

Specific embodiment

Illustrate specific embodiment of the present utility model, but following embodiment is only used with reference to the accompanying drawings and examples It is described in detail the utility model, does not limit the scope of the utility model in any way.

Program that is involved or relying on is the conventional program or simple program of the art in following embodiment, ability Field technique personnel can make conventional selection or are adaptively adjusted according to concrete application scene.

The devices such as involved unit module, parts or sensor in following embodiment unless otherwise instructed, are then Conventional commercial product；Involved circuit structure is then custom circuit structure without special instruction.

Embodiment 1：A kind of Image Edge-Detection system, referring to Fig. 1, by four Image Acquisition, storage, processing and display work( Energy module composition, each intermodule is using conventional electrical connection or signal connection relation；It is real using CMOS camera 0V7670 first The acquisition of existing spatial image, is transferred in FPGA platform by utilizing camera interface, is then first stored in 256M capacity SDRAM chips In, fpga chip reads image information, and its image border data is carried out at operation from SDRAM again using Canny algorithms Reason shows Image Edge-Detection information finally by the VGA displays of USB interface connection.

Fig. 2 is the image capture module illustrative view of functional configuration in the present embodiment, and the acquisition of image uses CMOS camera The camera of middle model OV7670；The pixel of the camera is 30W, and the image information data bit wide of output is 16, point To be strange, occasionally it is sequentially output；CAMERA control units are to refer to related register address and data through SCCB buses write-in camera Determine in register, the configuration work to camera is completed with this；The when program process that SCCB functional units pass through similar I2C agreements The configuration parameter of camera OV7670 is sent to via CMOS_SCL and CMOS_SDA pins in the register specified, completes number According to transmission and write-in, to camera carry out initial configuration work；Pass through SCCB functional units and CAMERA control units It is combined with each other, can realize the configuration work to camera collection image resolution ratio, output format, pixel clock etc.；CAMERA Functional unit is completed from the control information of EN interface CAMERA control units by the output timing of camera OV7670 To the collecting work of image information；The main function of CAMERA storage units is by camera the image collected information merits and demerits EN Interim caching is carried out with Date interfaces, so that following functional element continual can read image letter from the module Breath；It can be realized to camera initial configuration, acquisition and caching by image capture module.

Fig. 3 is the image storage module illustrative view of functional configuration in the present embodiment, and SDRAM storage chips is selected to complete to scheme As the storage of information, SDRAM control units and SDRAM functional units are further included；SDRAM control modules according to initialization operation, Refresh operation, write operation and reading grasp command set to complete the control to SDRAM function modules, realize and Image Acquisition information is deposited Storage.

Fig. 4 is the image display illustrative view of functional configuration in the present embodiment, is shown and passed through with RGB16 type VGA displays The processed edge-detected image information of image processing module is crossed, further includes VGA storage units and VGA functional units；VGA functions Unit control VGA displays make it and corresponding image are shown according to VGA displaying principles and defined sequential；VGA memory modules The cushioning effect to image data is mainly played, in the design in advance caches a line image information so that image is shown Module can be at any time be read out display.

The utility model is described in detail above in conjunction with drawings and examples, still, the skill of technical field Art personnel, can also be to each specific in above-described embodiment it is understood that under the premise of the utility model aims are not departed from Parameter changes, and forms multiple specific embodiments, is the common variation range of the utility model, no longer detailed one by one herein It states.

Claims

1. a kind of Image Edge-Detection system, shows including image capture module, image storage module, image processing module, image Show module；It is characterized in that：Described image acquisition module acquisition image information is delivered to image storage module and image procossing mould Block, by treated, image data is exported to image display described image processing module；Described image processing module includes Fpga chip containing Canny operators；Described image acquisition module includes acquisition rate and output image resolution ratio can be free The 0V7670 type CMOS cameras of setting；Described image acquisition module further include SCCB functional units, CAMERA control units, CAMERA functional units and CAMERA storage units.

2. Image Edge-Detection system according to claim 1, it is characterised in that：Described image memory module includes storage The SDRAM chips of image data.

3. Image Edge-Detection system according to claim 1, it is characterised in that：Described image memory module further includes SDRAM control units and SDRAM functional units.

4. Image Edge-Detection system according to claim 3, it is characterised in that：The model of the SDRAM chips HY57V2562GTR；Capacity：256M；Bus bit wide：16.

5. Image Edge-Detection system according to claim 1, it is characterised in that：The fpga chip model： Cyclone IV-EP4CE16F17C8。

6. Image Edge-Detection system according to claim 1, it is characterised in that：Described image display module includes The VGA displays of RGB16 specifications.

7. Image Edge-Detection system according to claim 1, it is characterised in that：Described image display module further includes VGA storage units and VGA functional units.