CN202551178U

CN202551178U - Portable image acquisition and compression device

Info

Publication number: CN202551178U
Application number: CN2012201795604U
Authority: CN
Inventors: 聂永丹; 赵建民; 胡庆; 李井辉; 袁文翠; 李冰
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2012-04-25
Filing date: 2012-04-25
Publication date: 2012-11-21
Anticipated expiration: 2022-04-25

Abstract

The utility model relates to a portable image acquisition and compression device which comprises a CCD (Charge Coupled Device) figure camera and a host, wherein an image collecting module, a DSP (Digital Signal Processor) image processor, an image transformation and compression module, an ARM microcontroller, an image storage module and a communication module are arranged in the host, wherein the image collecting module is connected with the DSP image processor, the DSP image processor is connected with the ARM microcontroller, the ARM microcontroller is respectively connected with the image storage module and the communication module; a USB interface and a wireless interface are arranged in a housing of the host; and the CCD figure camera is connected with the host through a data wire. Because a wavelet transform image and compression technology is adopted for replacing the traditional DCT (Discrete Cosine Transform) transformation and compression technology, the portable image acquisition and compression device can realize higher compression efficiency, and is beneficial to storage and identification of image information and advanced application processing on an image in subsequent.

Description

A kind of portable IMAQ and compression set

Technical field:

The utility model relates to image processing equipment, what be specifically related to is a kind of portable IMAQ and compression set.

Background technology:

Development along with information technology; The improvement of image processing techniques and raising; IMAQ and digitized image treatment technology are used widely in fields such as industry, agricultural, medical treatment, remote sensing, and relevant emerging application such as bar-code identification, literal identification, bio-identification (iris, face phase) etc. have also obtained unprecedented concern.These are used and all to require stable, quick, the low noise picture quality of acquisition, so be the key of dealing with problems as the IMAQ of application foundation and the raising of treatment technology.

The image that collects during image collecting device work is at present generally preserved with bitmap or JPEG compressed format, when image stored reaches the capacity that device supports, need image file be copied in the memory device such as computer.The deficiency that this system exists mainly comprises: the picture format compression ratio that collects is low, and it is too much that file takies memory space; The unloading of inconvenient image file when construct in places such as field.

Summary of the invention:

The purpose of the utility model provides a kind of portable IMAQ and compression set, the problem of inconvenient unloading when carrying out image processing that it is used to solve existing image collecting device.

The utility model solves the technical scheme that its technical problem adopted: this portable IMAQ and compression set comprise CCD digital camera, main frame; Image capture module, DSP image processor, image transform and compression module, ARM microcontroller, image memory module, communication module are installed in the main frame; Image capture module connects the DSP image processor; The DSP image processor connects the ARM microcontroller, and the ARM microcontroller is connected with image memory module, communication module respectively; Host housing is provided with USB interface, radio network interface; The CCD digital camera is connected through data wire with main frame.

The DSP image processor adopts the TMS320C6713 digital signal processor in the such scheme.

The ARM microcontroller adopts AT91RM9200 in the such scheme.

The utlity model has following beneficial effect:

1, the utility model can be realized higher compression efficiency owing to adopt the wavelet image compress technique to replace dct transform compress technique in the past, helps storage, identification and the follow-up ADVANCED APPLICATIONS processing to image of image document.

2, the utlity model has low in energy consumption, processing speed fast, be easy to integrated advantage.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structured flowchart of the utility model;

Fig. 3 is DSP image processor and an ARM microcontroller connection layout in the utility model.

1 CCD digital camera; 2 main frames; 3 USB interfaces; 4 radio network interfaces; 5 wired network interfaces.

Embodiment:

Below in conjunction with accompanying drawing the utility model is done further explanation:

In conjunction with Fig. 1, shown in Figure 2; This portable IMAQ and compression set comprise CCD digital camera 1, main frame 2, and image capture module, DSP image processor, image transform and compression module, ARM microcontroller, image memory module, communication module are installed in the main frame 2; The DSP image processor adopts the TMS320C6713 digital signal processor, and the ARM microcontroller adopts AT91RM9200.Image capture module connects the DSP image processor, and the DSP image processor connects the ARM microcontroller, and the ARM microcontroller is connected with image memory module, communication module respectively, and communication module comprises wired transport module and wireless transport module.Host housing is provided with USB interface 3, radio network interface 4, wired network interface 5; CCD digital camera 1 and main frame 2 are connected through data wire.Below the DSP image processor abbreviates DSP as in the narration, and the ARM microcontroller abbreviates ARM as.

DSP is connected with ARM through the HPI mouth in the utility model.According to the HPI interface principle, it is as shown in Figure 3 with TMS320C6713 hardware connectivity scenario to design AT91RM9200: the data wire D0:15 of ARM is linked to each other with the data/address line HD0:15 of DSP; The HR/W, HCNTL1, HCNTL0 and the HHWIL control signal wire that are connected DSP with address signal line A4, A3, A2 and the A1 of ARM respectively; Be connected control signal wire HCS, HDS2, HDS1 and the HRDY of DSP respectively with ARM external bus interface control signal wire NCS2, NWR0, NRD and NWAIT, wherein the HRDY negate connects NWAIT; The HINT holding wire of DSP is connected to the interruption pin IRQ0 of ARM.The HAS holding wire of DSP directly is pulled to high level with 10k resistance in design.After DSP detects a secondary license plate image; Deposit the bag of the NAL unit of image in the HPID memory in the location longways; Call out AT91RM9200 then and interrupt, have no progeny during ARM receives and use the contact address access mode to read the HPID register, till the data of reading respective length; So far just accomplished once transmission, waited for that ARM interrupts next time.ARM can also realize that wired and wireless dual mode transmits the data after encoding, and wired mode adds devices such as PHY through the built-in 10/100Mbps ethernet mac of AT91RM9200, realizes that through the RJ45 interface network connects; Wireless access adopts wireless communication module, and GPRS or 3G module realize the connection of network.Communicate between UART interface and the AT91RM9200 of wireless communication module through the support hardware Flow Control, the AT command set of accepting AT91RM9200 through UART starts radio communication and transfer of data.

During the utility model work; Image capture module uses the CCD digital camera that material object is gathered into digital picture, sends DSP to through USB interface and handles, and DSP carries out wavelet transformation earlier; Re-using the wavelet coding technology exports after with image compression; The storage of the whole device of ARM microprocessor controls with operating state such as communicate by letter, ARM links to each other with memory device through USB interface, links to each other with the network equipment through wired and wireless two kinds of network interfaces; The code stream of compression is arrived PC terminal or mobile phone terminal to transfer of data through the wired and wireless dual mode that ARM expands, and the user can decode the view data that transmits and browse, analyzes, discerns, stores.

The utility model is intended to improve the image compression rate of image collecting device, makes things convenient for image data transmission, is a kind of portable, image collecting device efficiently, and it is little to have solved image compression rate, the inconvenient problem of field data transmission.

Claims

1. portable IMAQ and compression set; It is characterized in that: this portable IMAQ and compression set comprise CCD digital camera (1), main frame (2); Image capture module, DSP image processor, image transform and compression module, ARM microcontroller, image memory module, communication module are installed in the main frame (2); Image capture module connects the DSP image processor; The DSP image processor connects the ARM microcontroller, and the ARM microcontroller is connected with image memory module, communication module respectively; Main frame (2) shell is provided with USB interface (3), radio network interface (4); CCD digital camera (1) is connected through data wire with main frame (2).

2. portable IMAQ according to claim 1 and compression set is characterized in that: described DSP image processor adopts the TMS320C6713 digital signal processor.

3. portable IMAQ according to claim 1 and compression set is characterized in that: described ARM microcontroller adopts AT91RM9200.