CN102289416A - Image Acquisition Method Based on Virtual Hardware Device - Google Patents

Abstract

The invention relates to an image acquisition method based on virtual hardware equipment, which comprises the following steps: creating an interface protocol encapsulation module; loading image acquisition hardware equipment; configuring the attribute of image acquisition hardware equipment; the application program calls the interface protocol in the interface protocol encapsulation module to drive the image acquisition hardware equipment and performs scanning action. The invention shields the difference of hardware interfaces at the bottom layer in the image acquisition process, provides a uniform processing mode and interfaces for users, uniformly manages various acquisition equipment of different types, brands and models, realizes the dynamic switching among the acquisition equipment in application, realizes the memory function of a virtual hardware packaging layer, and truly realizes that the acquired hardware equipment is irrelevant to software.

Description

Image Acquisition Method Based on Virtual Hardware Device

technical field

The invention relates to the technical field of image communication, in particular to an image acquisition method based on virtual hardware equipment.

Background technique

Image acquisition is an image acquisition process of obtaining image data through image recording equipment under the control of the image business application system. Commonly used image acquisition devices generally include scanners, cameras, and digital cameras. Such image acquisition devices generally have different types, models, and brands, and use different interface methods. The internationally common image acquisition standard interface technologies mainly include TWAIN interface technology, KOFAX interface technology, ISIS interface technology and DirectShow technology. TWAIN interface technology is used to extract images from static image devices. Most scanners and digital cameras provide TWAIN drivers. Using a unified TWAIN interface, applications can easily obtain images from these devices; KOFAX The interface technology is driven by the ISIS standard. In addition to basic image acquisition and display, it also provides image processing functions such as image removal of black borders, shadow removal, barcode recognition, and complementary code recognition; ISIS interface technology is the interface between images and scanners. Standard, a graphics software standard developed by Pixel, belongs to the category of input software and is a software module system. Each part performs a specific image processing function. The ISIS module can also control scanners and printers, assist in processing images, compress and convert image file formats, and read and write data files; DirectShow technology is a technology developed by Microsoft that can An application programming interface that allows software developers to perform various processing on media files. Based on the Microsoft Windows composition object model framework, DirectShow provides a common media interface for most Microsoft programming languages, and is an extensible It is a framework based on Filter that can play or record media files under the command of users or developers, and can control the output of video devices by using DirectShow technology.

During the scanning and recording process of image acquisition equipment, due to its different interface definitions, there are great differences in control methods and drivers of image acquisition equipment. Generally, image acquisition equipment supports one or more of the above-mentioned interface standard technologies. kind. When users use the above-mentioned image acquisition devices, they must be equipped with drivers that meet the interface standards of image acquisition devices in order to work normally. Generally, device drivers are specially configured for image acquisition devices, and they have fast connection and data communication. The advantage of accurate transmission, but this driver can only drive this type of image acquisition device. When using multiple image acquisition devices with different types, models, brands and interface methods, it is necessary to configure multiple corresponding drivers. program, which brings troubles to users.

Contents of the invention

The technical problem to be solved by the present invention is to provide an image acquisition method based on virtual hardware devices compatible with different types, different brands, different models, and different interface modes for the above-mentioned problems existing in the existing image acquisition process.

For solving the problems referred to above, technical scheme of the present invention is:

An image acquisition method based on a virtual hardware device, comprising the following steps:

(1) Create an interface protocol encapsulation module, and provide the calling function corresponding to the interface protocol to the application program;

(2) Load the image acquisition hardware device, and create a corresponding virtual hardware encapsulation layer according to the attributes of the loaded image acquisition hardware device;

(3) Configure the properties of the image acquisition hardware device, and obtain the interface protocol configuration information of the image acquisition hardware device, configure the interface protocol of the virtual hardware encapsulation layer according to the interface protocol configuration information, and pass the interface protocol corresponding to the hardware device interface protocol to the virtual hardware encapsulation layer Call functions;

(4) The application program calls the interface protocol in the interface protocol encapsulation module to drive the image acquisition hardware device by calling the function, and performs the scanning action.

Preferably, creating interface protocol encapsulation module in described step (1) is to encapsulate Kofax interface protocol, TWAIN interface protocol, Folder interface protocol, interface protocol based on DirectShow technology, ISIS interface protocol and API interface protocol in interface protocol encapsulation In the module; the interface protocol is invoked by the calling function corresponding to the interface protocol in the application program.

Preferably, the step (2) also includes the detection of a virtual hardware encapsulation layer, the detection of the virtual hardware encapsulation layer is performed after the image acquisition hardware device is loaded, and the detection of the virtual hardware encapsulation layer is to detect the image acquisition hardware device in a connected state Whether the corresponding virtual encapsulation layer already exists and is correctly configured. If the configuration is complete, load the virtual hardware encapsulation layer corresponding to the image acquisition hardware and jump to step (4); if it does not exist, create a virtual hardware encapsulation layer and follow-up Step (3) and step (4).

Preferably, configuring the virtual hardware encapsulation layer in the step (3) also includes configuring an encapsulation layer loading interface, an encapsulation layer unloading interface, an encapsulation layer query interface, an encapsulation layer alias management interface, an encapsulation layer adjustment interface and an encapsulation layer status interface.

Preferably, creating the virtual hardware encapsulation layer corresponding to the image acquisition hardware device in the step (2) is to transfer the attributes of the loaded image acquisition hardware device into the virtual hardware encapsulation layer.

The image collection method based on the virtual hardware device of the present invention realizes the integration of various documents and digital collection of image data, creates a virtual hardware encapsulation layer corresponding to the hardware device, provides a variety of commonly used interface protocol standards, and includes support for ISIS , TWAIN, KOFAX interface protocol support, can be applied to almost any scanner on the market, not only supports high-speed scanners, but also supports ordinary flatbed scanners; includes support for DirectShow, can be applied to any scanner on the market A video head device; at the same time, this method supports the access of the API interface, which is convenient for the communication of some non-standard protocol interfaces. The present invention shields the underlying hardware interface differences during the image collection process, provides users with a unified processing method and interface, and uniformly manages various collection devices of different types, brands, and models, and realizes the connection between various collection devices in the application. It realizes the dynamic switching of the virtual hardware encapsulation layer memory function, and truly achieves that the acquisition hardware device has nothing to do with the software; moreover, users can configure suitable templates and scanning structures according to their own business needs to carry out image acquisition work.

Description of drawings

FIG. 1 is an image acquisition flow chart of the image acquisition method based on a virtual hardware device in the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and examples, but the protection scope of the present invention is not limited thereto.

The image acquisition method based on the virtual hardware device of the present invention shields the difference of the underlying hardware interface during the image acquisition process, provides a unified processing method and interface, and uniformly manages various acquisition devices of different types, brands, and models. The memory function of the virtual hardware encapsulation layer is realized in the application, which will be described through specific embodiments below.

Embodiment 1: The image acquisition hardware device of the present invention is a scanner called KODAK i4600, which supports the TWAIN interface protocol, and the name of the virtual encapsulation layer corresponding to the hardware device is SV_KODAK4600.

With reference to Fig. 1, the image collection method based on virtual hardware device of the present invention, comprises the following steps:

Encapsulate Kofax interface protocol, TWAIN interface protocol, Folder interface protocol, interface protocol based on DirectShow technology, ISIS interface protocol and API interface protocol in the interface protocol encapsulation module; provide the application program with the interface protocol information encapsulated by the interface protocol encapsulation module Call functions corresponding to each interface protocol;

Load the image acquisition hardware device, and carry out the detection of virtual hardware encapsulation layer; The detection of described virtual hardware encapsulation layer is to detect whether the virtual encapsulation layer SV_KODAK4600 corresponding to the scanner KODAK i4600 in connected state exists and is configured correctly, and configuration file information storage Search in the directory, and proceed in two steps according to the situation of the search:

Case 1: The virtual encapsulation layer SV_KODAK4600 corresponding to the scanner KODAK i4600 does not exist, and the following steps are required:

1. Call the new encapsulation layer program, pass in the encapsulation layer name SV_KODAK4600, create the corresponding virtual hardware encapsulation layer SV_KODAK4600, and pass the attributes of the loaded scanner KODAK i4600 into the virtual hardware encapsulation layer;

2. The user configures the properties of the scanner KODAK i4600 through the hardware device property interface, and can set the scanning parameters as the default scanning parameters, or set the special scanning properties of KODAK i4600; the interface protocol configuration information of the scanner is TWAIN interface protocol, select Encapsulation layer SV_KODAK4600, the standard protocol interface of the configuration encapsulation layer is the TWAIN interface protocol, and the calling function of the TWAIN interface is passed to the encapsulation layer SV_KODAK4600; the configuration of the virtual hardware encapsulation layer also includes the encapsulation layer loading interface LoadWrapper(), encapsulation layer unloading interface UnloadWrapper (), encapsulation layer query interface QueryWrapper (), encapsulation layer alias management interface NewWrapperAlias (), encapsulation layer adjustment interface ConfigAttribute () and encapsulation layer state interface CheckDeviceConnect () configuration;

3. The application calls the scanning interface function and the TWAIN interface calling function in the interface protocol encapsulation module, drives the scanner KODAK i4600, and performs the scanning action.

The second case: the virtual encapsulation layer SV_KODAK4600 corresponding to the scanner KODAK i4600 already exists and is correctly configured, and the following steps are required:

1. The application program calls the encapsulation layer loading interface LoadWrapper(), loads the virtual hardware encapsulation layer, and passes in the encapsulation layer name SV_KODAK4600, the virtual encapsulation layer automatically reads the configuration information of KODAK i4600, loads the hardware device through the TWAIN protocol, and sets the scanning parameters;

2. The application program calls the scanning interface function and the TWAIN interface calling function in the interface protocol encapsulation module, drives the scanner KODAK i4600, and performs scanning actions.

Through the above steps, the establishment of the virtual hardware encapsulation layer SV_KODAK4600 corresponding to the scanner KODAKi4600 is completed, and the scanner KODAK i4600 is driven to scan through the virtual hardware encapsulation layer; users do not need to worry about the incompatibility between the software driver and the image acquisition hardware device in terms of transmission and communication The problem.

Embodiment 2: the image acquisition hardware device of the present invention is a scanner named BANTEC S-185, which does not support the TWAIN interface protocol and belongs to a non-standard protocol interface, and the name of the virtual encapsulation layer corresponding to the hardware device is SV_BANTEC. BANTEC series scanners can scan through the ISIS interface protocol. In order to illustrate the non-standard method, this embodiment adopts the interface encapsulation provided by directly calling the device API interface driver. The process of driving the scanner BANTEC S-185 through the virtual encapsulation layer is similar to that through the TWAIN protocol, except that the interface provided by the virtual encapsulation layer is different.

With reference to Fig. 1, the image collection method based on virtual hardware device of the present invention, comprises the following steps:

Encapsulate Kofax interface protocol, TWAIN interface protocol, Folder interface protocol, interface protocol based on DirectShow technology, ISIS interface protocol and API interface protocol in the interface protocol encapsulation module; provide the application program with the interface protocol information encapsulated by the interface protocol encapsulation module Call functions corresponding to each interface protocol;

Load the image acquisition hardware device, and carry out the detection of the virtual hardware encapsulation layer; the detection of the virtual hardware encapsulation layer is to detect whether the virtual encapsulation layer SV_BANTEC corresponding to the scanner BANTEC S-185 in the connected state already exists and is correctly configured, and the configuration file Search in the information storage directory, and proceed in two steps according to the situation of the search:

The first case: the virtual encapsulation layer SV_BANTEC corresponding to the scanner BANTEC S-185 does not exist, and the following steps are required:

1. Call the new encapsulation layer program, pass in the encapsulation layer name SV_BANTEC, create the corresponding virtual hardware encapsulation layer SV_BANTEC, and transfer the attributes of the loaded scanner BANTEC S-185 into the virtual hardware encapsulation layer;

2. The user configures the properties of the scanner BANTEC S-185 through the hardware device property interface, and can set the scanning parameters as the default scanning parameters, or set the special scanning properties of BANTEC S-185; obtain the interface protocol configuration information of the scanner as API Interface protocol, select encapsulation layer SV_BANTEC, configure the non-standard protocol interface of the encapsulation layer as the API interface protocol, and transfer the calling function of the API interface to the encapsulation layer SV_BANTEC; configure the virtual hardware encapsulation layer also includes loading the encapsulation layer interface LoadWrapper(), Configuration of the encapsulation layer unloading interface UnloadWrapper(), encapsulation layer query interface QueryWrapper(), encapsulation layer alias management interface NewWrapperAlias(), encapsulation layer adjustment interface ConfigAttribute() and encapsulation layer status interface CheckDeviceConnect();

3. The application program calls the scanning interface function and the API interface calling function in the interface protocol encapsulation module, drives the scanner BANTEC S-185, and performs scanning actions.

The second case: the virtual encapsulation layer SV_BANTEC corresponding to the scanner BANTEC S-185 already exists and is correctly configured, and the following steps are required:

1. The application calls the encapsulation layer loading interface LoadWrapper(), loads the virtual hardware encapsulation layer, and passes in the encapsulation layer name SV_BANTEC. The virtual encapsulation layer automatically reads the configuration information of BANTEC S-185, loads the hardware device through the API interface protocol, and sets scan parameters;

2. The application program calls the scanning interface function and the API interface calling function in the interface protocol encapsulation module, drives the scanner BANTEC S-185, and performs scanning actions.

Through the above steps, the establishment of the virtual hardware encapsulation layer SV_BANTEC corresponding to the scanner BANTEC S-185 is completed, and the scanner BANTEC S-185 is driven to scan through the virtual hardware encapsulation layer; for some devices that do not support standard protocol interfaces but have API interfaces The image acquisition hardware device can also be driven in the above manner.

Claims (5)

1. an image collection method based on virtual hardware equipment, is characterized in that, comprises the following steps: (1) Create an interface protocol encapsulation module, and provide the calling function corresponding to the interface protocol to the application program; (2) Load the image acquisition hardware device, and create a corresponding virtual hardware encapsulation layer according to the attributes of the loaded image acquisition hardware device; (3) Configure the properties of the image acquisition hardware device, and obtain the interface protocol configuration information of the image acquisition hardware device, configure the interface protocol of the virtual hardware encapsulation layer according to the interface protocol configuration information, and pass the interface protocol corresponding to the hardware device interface protocol to the virtual hardware encapsulation layer Call functions; (4) The application program calls the interface protocol in the interface protocol encapsulation module to drive the image acquisition hardware device by calling the function, and performs the scanning action. 2. the image collection method based on virtual hardware device according to claim 1, it is characterized in that, the creation interface agreement encapsulation module in the described step (1) is Kofax interface agreement, TWAIN interface agreement, Folder interface agreement, based on The interface protocol of DirectShow technology, the ISIS interface protocol and the API interface protocol are encapsulated in the interface protocol encapsulation module; the interface protocol is invoked by the calling function corresponding to the interface protocol in the application program. 3. the image acquisition method based on virtual hardware device according to claim 1, is characterized in that, described step (2) also comprises the detection of virtual hardware encapsulation layer, and the detection of virtual hardware encapsulation layer is after loading image acquisition hardware device Execution, the detection of the virtual hardware encapsulation layer is to detect whether the virtual encapsulation layer corresponding to the image acquisition hardware device in the connected state already exists and is configured correctly. If the configuration is completed, load the virtual hardware encapsulation layer corresponding to the image acquisition hardware and jump to Go to step (4); if it does not exist, create a virtual hardware encapsulation layer and the subsequent steps (3) and (4). 4. The image acquisition method based on virtual hardware device according to claim 1, characterized in that, configuring the virtual hardware encapsulation layer in the step (3) also includes configuring encapsulation layer loading interface, encapsulation layer unloading interface, encapsulation layer Query interface, encapsulation layer alias management interface, encapsulation layer adjustment interface and encapsulation layer status interface. 5. The image acquisition method based on a virtual hardware device according to claim 1, wherein the virtual hardware encapsulation layer corresponding to the image acquisition hardware device created in the step (2) is to be loaded into the image acquisition hardware device Attributes are passed into the virtual hardware encapsulation layer.

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