CN116401484A - Method, device, terminal and storage medium for processing paper material in electronization mode - Google Patents
Method, device, terminal and storage medium for processing paper material in electronization mode Download PDFInfo
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Abstract
The invention provides a paper material electronization processing method, a device, a terminal and a storage medium. The method comprises the following steps: establishing a connection with a multimedia device; responding to a first triggering operation of a user on a WEB application page of a browser, and acquiring the equipment name of the multimedia equipment; opening the multimedia device according to the device name; responding to a second triggering operation of a user, and receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment; and performing image processing on the current frame image to obtain an electronic image, and displaying by adopting a WEB application page of the browser. The invention can make the processing process of the paper material electronized not only limited to the IE browser, but also avoid the phenomenon of the browser jamming, thereby improving the working efficiency.
Description
Technical Field
The present invention relates to the field of data identification technologies, and in particular, to a paper material electronic processing method, a device, a terminal, and a storage medium.
Background
In the field of electronic government affairs, in order to assist in the on-line transfer of administrative approval items, electronic collection of application materials is required by means of multimedia equipment such as a high-speed scanner and a scanner. The traditional mode is usually developed by adopting a plug-in technology, and the browser directly calls the OCX plug-in through javascript by installing and registering the OCX plug-in of the multimedia equipment to the browser of the computer terminal so as to realize electronic collection of the paper material.
However, in practical applications, the OCX plug-in provided by the multimedia device generally only supports the IE browser, and cannot run on different versions or higher-performance browsers. And the electronic collection process of the paper material is easy to cause the browser to be blocked due to the defects of the IE browser, such as performance, safety and compatibility, and the working efficiency is low.
Disclosure of Invention
The embodiment of the invention provides a paper material electronization processing method, a device, a terminal and a storage medium, which are used for solving the problems that the existing paper material electronization process only supports an IE browser, and the browser is blocked and the working efficiency is low.
In a first aspect, an embodiment of the present invention provides a method for processing paper materials in an electronic manner, including:
establishing a connection with a multimedia device;
responding to a first triggering operation of a user on a WEB application page of a browser, and acquiring the equipment name of the multimedia equipment;
opening the multimedia device according to the device name;
responding to a second triggering operation of a user, and receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment;
and performing image processing on the current frame image to obtain an electronic image, and displaying by adopting a WEB application page of a browser.
In one possible implementation manner, the performing image processing on the current frame image to obtain an electronic image includes:
carrying out graying and binarization processing on the current frame image to obtain a binarized image;
detecting the paper boundary contour in the binarized image, and performing color filling on the binarized image according to the paper boundary contour to obtain a filled image;
acquiring an ROI (region of interest) in the filling image, and cutting the filling image to obtain a cut image containing the ROI;
performing rotation correction on the cut image to obtain a rotation image;
acquiring the outermost boundary contour in the rotation image and the outer boundary contour of the target image; the target image is a material content image in the paper material to be electronic;
and cutting the rotation image according to the outermost boundary contour in the rotation image and the outer boundary contour of the target image to obtain the target image, and determining the target image as the electronic image.
In one possible implementation manner, the performing rotation correction on the cropped image to obtain a rotation image includes:
Detecting all line segments in the cut image, and respectively determining the angle values of all the line segments;
calculating a rotation angle according to the angle value of the line segment;
and carrying out rotation correction on the cut image according to the rotation angle to obtain the rotation image.
In one possible implementation manner, the calculating the rotation angle according to the angle value of the line segment includes:
all line segments with angle values smaller than a preset value are determined to be first line segments;
and calculating an average value of the angle values corresponding to the first line segment, and determining the average value as the rotation angle.
In one possible implementation manner, cutting the rotation image according to the outermost boundary contour in the rotation image and the outer boundary contour of the target image to obtain the target image includes:
determining a region to be cut between the outermost boundary contour in the rotating image and the outer boundary contour of the target image according to the outermost boundary contour in the rotating image and the outer boundary contour of the target image;
and cutting the rotation image according to the region to be cut to obtain a target image.
In one possible implementation manner, before the receiving, in response to the second trigger operation of the user, the current frame image corresponding to the paper material to be electronic sent by the multimedia device, the method further includes:
Acquiring and adjusting display parameters of the multimedia equipment;
receiving each frame of image of the paper data to be electronic sent by the multimedia equipment in real time; the display format of each frame of image is determined by the display parameters;
and compressing each frame of image, and presenting the compressed image in real time.
In one possible implementation, the acquiring the ROI area in the filling image includes:
downsampling the filling image to generate a pyramid image;
ORB feature points or SIFT feature points are extracted from the pyramid image;
ordering the coordinate values of all the characteristic points according to the horizontal direction and the vertical direction respectively to obtain all the coordinate values after ordered arrangement;
in all the coordinate values after the sequential arrangement, the vertex coordinates of the ROI area are determined by calculating the average value of K adjacent points; the K is an integer greater than or equal to 1;
and acquiring the ROI area according to the vertex coordinates.
In a second aspect, an embodiment of the present invention provides a paper material electronization processing apparatus, including:
the connection module is used for establishing connection with the multimedia equipment;
the response module is used for responding to a first triggering operation of a user on a WEB application page of the browser and acquiring the equipment name of the multimedia equipment;
The response module is further used for opening the multimedia device according to the device name;
the processing module is used for responding to a second triggering operation of a user and receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment;
the processing module is also used for carrying out image processing on the current frame image to obtain an electronic image, and displaying the electronic image by adopting a WEB application page of a browser.
In a third aspect, embodiments of the present invention provide a terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to the first aspect or any one of the possible implementations of the first aspect, when the computer program is executed.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the first aspect or any one of the possible implementations of the first aspect.
The embodiment of the invention provides a paper material electronization processing method, a device, a terminal and a storage medium, which are connected with multimedia equipment; responding to a first triggering operation of a user on a WEB application page of a browser, and acquiring the equipment name of the multimedia equipment; opening the multimedia device according to the device name; responding to a second triggering operation of a user, and receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment; and performing image processing on the current frame image to obtain an electronic image, and displaying by adopting a WEB application page of the browser. The method comprises the steps that a process of executing paper material electronization is started through a first trigger operation of a user on a WEB application page of a browser, after an electronized image is obtained, the WEB application page is displayed, the whole processing process is free of browser participation, the calculation burden of the browser can be greatly reduced, the phenomenon that the browser is blocked is avoided, and the working efficiency of administrative approval is improved. In addition, the browser is only responsible for receiving the first trigger operation and displaying the electronic image, so the processing method is not limited to the IE browser, and any browser capable of carrying out data transmission can be supported.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an implementation of a method for electronically processing a paper material provided by an embodiment of the present invention;
FIG. 2 is a flowchart of an implementation of image processing for a current frame image according to an embodiment of the present invention;
FIG. 3 is a flowchart of an implementation of acquiring a ROI area in a fill image according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an electronic processing device for paper materials according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In the prior art, when the paper material is electronized, an OCX plug-in provided by a multimedia equipment manufacturer is usually required to be installed on a browser of a computer terminal, and the browser performs corresponding operation to realize the electronization of the paper material. However, the OCX plug-in only supports the IE browser, which causes inconvenience to the user, and the whole electronic process is completely handled by the browser, so that the phenomenon of browser blocking often occurs, and the working efficiency of administrative approval is reduced.
Based on the above situation, the embodiment of the invention provides a paper material electronization processing method, which is used for solving the problems that in the paper material electronization process, an OCX plug-in only supports an IE browser, and the phenomenon of browser blocking can occur, so that the working efficiency is reduced. For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
Fig. 1 is a flowchart of an implementation of a paper material electronization processing method according to an embodiment of the present invention, where the method is applied to a terminal, and the method is described in detail as follows:
Electronization of a paper material is essentially the process of converting the paper material into an electronic image. Based on this, it is first necessary to establish a connection between the terminal and the multimedia device, so as to establish a communication connection between the multimedia device and the terminal for data transmission.
For example, a user may insert a USB interface of the multimedia device into the terminal, and the terminal establishes a communication connection with the multimedia device by detecting USB information.
In practical applications, administrative approval business is mainly performed on a browser. Thus, the electronic button of the paper material is also usually arranged on the WEB application page of the browser, and the user activates the electronic work of the whole paper material by triggering the electronic button on the WEB application page. The first trigger operation here is essentially an operation in which the user triggers the electronic button.
It should be noted that the method for processing the paper material in the embodiment of the present invention is not performed in the browser program. For convenience of distinction, in the embodiment of the present invention, an application program corresponding to a processing method for electronizing a paper material is determined as a multimedia application service. That is, the processing method of the electronic paper material in the embodiment of the present invention is performed in the multimedia application service.
The multimedia application service and the browser program run independently of each other. And the browser program and the multimedia application service establish WebSockets communication connection, and the WebSockets communication connection and the multimedia application service can carry out data transmission through a webchannel. It is also because the multimedia application service and the browser program run independently of each other, which makes the multimedia application service not only limited to the IE browser, but also can support any browser program that can communicate with it.
WebSocket is a protocol that performs full duplex communication over a single TCP connection. The WebSocket makes data exchange between the client and the server simpler, and allows the server to actively push data to the client. In the WebSocket API, the browser and the server only need to complete one handshake, and can directly create persistent connection between the two and perform bidirectional data transmission.
That is, through WebSockets communication connection, bidirectional data transmission can be performed between the multimedia application service and the browser.
The user triggers an electronic button on the WEB application page, the browser sends the signal to the multimedia application service, and the multimedia application service executes the step of acquiring the equipment name of the multimedia equipment after receiving the signal.
The multimedia device mainly comprises: multimedia video devices and multimedia image devices. When the device name of the multimedia video device is acquired, an availableclamera function of a CameraInfo class library in the multimedia technology library can be used for calling an IMMNOTIFYITION client interface to trigger a callback, and a unique identifier GUID of the multimedia device is attached to the callback. And obtaining the device name of the multimedia video device through an IMMDeviceEnuper enumeration interface according to the unique identifier GUID. When the device name of the multimedia image device is acquired, the device name of the multimedia image device may be directly acquired through the TWAIN protocol.
It should be noted that, when the device name is obtained by the above method, the resolution of the multimedia device may be obtained at the same time. But only the device name is used to enable the corresponding multimedia device to be turned on.
The OCX plug-in the prior art is usually provided by a manufacturer of the multimedia device, and the communication mode of the OCX plug-in is cured when the multimedia device leaves the factory, so that the multimedia device can only communicate with the corresponding OCX plug-in, and the OCX plug-ins provided by different manufacturers of the multimedia device are not compatible. Each multimedia device can only work normally by using the corresponding plug-in.
However, when the device names of the multimedia devices are acquired, the method integrates two modes of calling back the unique identifier GUID and TWAIN protocol through the IMMNOTIFY client interface, so that the device names of all the multimedia devices can be acquired. Therefore, the processing method for electronizing the paper material provided by the embodiment of the invention can be adapted to multimedia equipment of different brands, and is not limited to one type or a certain class of multimedia equipment.
According to the device name obtained in step 102, the multimedia device can be directly opened by calling an open method by using a video capture class library in an OpenCV technology library which satisfies the Apache 2 protocol.
In general, as long as the device name of the multimedia device can be obtained, which indicates that the communication connection has been successfully established with the multimedia device, the multimedia device can be opened through the multimedia application service.
And 104, receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment in response to a second trigger operation of the user.
The WinForm window is arranged in the multimedia application service and is used for previewing the current frame image corresponding to the paper material to be electronized in real time. A photographing button is arranged on the WinForm window, and when a user triggers the photographing button, the multimedia application service can receive a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment. A webchannel is arranged between the WinForm window and the multimedia application service and is used for carrying out data transmission in real time. The second triggering operation is basically that the user triggers the photographing button, when the photographing button on the WinForm window is triggered, the multimedia application service can receive the triggering signal through the webchannel channel, and the step of receiving the current frame image corresponding to the paper material to be electronic sent by the multimedia device is started.
Optionally, before step 104, the method further includes:
acquiring and adjusting display parameters of the multimedia equipment;
receiving each frame of image of paper data to be electronic sent by multimedia equipment in real time; the display format of each frame of image is determined by the display parameters;
and compressing each frame of image, and presenting the compressed image in real time.
The display parameters here include: resolution, compression format, and frame rate. Wherein the resolution has been obtained in step 102. The compression format and frame rate may be set by itself, and embodiments of the present invention are not limited in this regard.
Illustratively, embodiments of the present invention employ MJPEG video compression format. Compared with other video compression formats, the MJPEG video compression format has higher speed, and can achieve the effects of real-time presentation and real-time preview by adopting the MJPEG video compression format, and avoid the delay phenomenon.
The display format of each frame of image can be correspondingly adjusted through the display parameters. In addition, before the image is presented, in order to reduce the program running load, each frame of image of the paper material to be electronically treated can be compressed in a binary stream by adopting zgip compression technology, and each compressed frame of image is presented by calling WinForm window.
In essence, the WinForm window is a preview window, through which a user can observe in real time the effect of the paper material to be electronic, for example, whether the paper material to be electronic is inclined, blocked, etc. When the preview effect in the WinForm window meets the user expectation, the user can trigger a photographing button on the WinForm window, and the multimedia application service receives the current frame image corresponding to the paper material to be electronic in real time.
And 105, performing image processing on the current frame image to obtain an electronic image, and displaying by using a WEB application page of a browser.
Optionally, referring to fig. 2, step 105 may include:
and 151, carrying out graying and binarization processing on the current frame image to obtain a binarized image.
The gray value of all pixel points in the binarized image is 0 or 255. Compared with a color image, the binary image is in two display states with distinct black and white, occupies less computing resources, and is convenient for subsequent contour detection.
The paper boundary contour here is essentially the contour corresponding to the paper edge of the paper material to be electronized. By detecting the paper boundary contour, the area of the paper material to be electronized in the binarized image can be determined.
Detecting the paper boundary contour in the binarized image may be achieved using an edge detection algorithm. Common edge detection algorithms include Canny edge detection algorithm, sobel algorithm, laplace algorithm, and the like. The embodiment of the invention is not particularly limited to the specific implementation of the step of detecting the paper boundary contour in the binarized image.
Illustratively, embodiments of the present invention employ a Canny edge detection algorithm to detect paper boundary contours in a binarized image.
When a Canny edge detection algorithm is utilized to detect the paper boundary contour in the binary image, a Gaussian filter is needed to filter out image noise in the binary image; then, respectively calculating the gradient intensity and the direction of each pixel point in the binarized image, wherein the position with large gradient intensity is possibly an edge, and the possible edge position can be determined by calculating the gradient intensity and the direction; the edge position is very fuzzy, and all gradient intensity values except the local maximum value are required to be suppressed to 0 by utilizing non-maximum value suppression, so that the edge position is more clear; most edge positions can be determined through non-maximum suppression, but edge pixels due to straying exist, the edge pixels can be detected through double threshold values, the edge pixels with weak gradient strength are filtered, the edge pixels with high gradient strength are reserved, and the edge pixels are determined as edges; finally, the edge pixels with the isolated low threshold points, namely the isolated weak gradient intensity are inhibited, and the rest edge pixels with the weak gradient intensity are determined as edges, so that the complete edge profile is obtained.
For all contours output by the Canny edge detection algorithm, the outermost contour is determined as the paper boundary contour.
In practical applications, due to algorithm errors and other reasons, the paper boundary contour determined according to the Canny edge detection algorithm may not be a closed area, and color filling cannot be performed directly according to the paper boundary contour. Thus, color filling can be performed by first determining a filling area composed of a plurality of contour vertex coordinates from the paper boundary contour and from the contour vertex coordinates.
In performing color filling, bilinear interpolation may be used. Bilinear interpolation essentially involves linear interpolation in two directions, one for each. The method and the device can be simply understood as that a white pixel block is inserted between every two pixel blocks in the horizontal direction in the whole filling area, and the gray value of the white pixel block is 255; and inserting a white pixel block between every two pixel blocks in the vertical direction, so as to complete color filling in the whole filling area and obtain a filling image.
The process of color filling is essentially the process of interpolating pixels, and the interpolation pixels can eliminate image jaggies and refine image details, so that the image can be amplified anyway and looks similar to the original image, and the phenomena of image blurring and serious jaggies are avoided after the image is amplified.
ROI (Region Of Interest), the region of interest. I.e. the important areas where subsequent processing is required. By acquiring the ROI area in the filling image and cutting off the residual area, only the ROI area is reserved, and the cut image is obtained, so that on one hand, the occupied computing resources in the image processing process can be reduced, and on the other hand, the image processing precision can be increased.
Optionally, referring to fig. 3, acquiring the ROI area in the filling image includes:
Considering that the feature points need to be extracted by the FAST algorithm in step 1532, the feature points extracted by the FAST do not have scale invariance, the filling image is downsampled in advance to generate a pyramid image before step 1532, so that the algorithm has scale invariance.
At step 1532, ORB feature points or SIFT feature points are extracted on the pyramid image.
Extracting ORB feature points in the pyramid image by using a FAST algorithm, and storing coordinate values of the ORB feature points into a matrix when the number of the ORB feature points is larger than a first threshold value to obtain an ORB feature point coordinate matrix 
；
Otherwise, extracting SIFT feature points in the pyramid image, and storing coordinate values of the SIFT feature points into a matrix to obtain a SIFT feature point coordinate matrix
。
Wherein, the liquid crystal display device comprises a liquid crystal display device,
representing ORB feature point coordinate matrix, +.>
Coordinate values representing the first ORB feature point,
indicate->
Coordinate values of the ORB feature points are assumed to be shared +.>
Individual ORB feature points, < >>
Representing SIFT feature point coordinate matrix, ++>
Coordinate value representing the first SIFT feature point, < >>
Indicate->
Coordinate values of the SIFT feature points are assumed to be shared +.>
And SIFT feature points.
It should be noted that, the coordinate values of the feature points are only stored on the main diagonal of the matrix, and the rest positions are always set to zero.
First, element values in the ORB feature point coordinate matrix or the SIFT feature point coordinate matrix obtained in step 1532 are extracted to form vectors, respectively
Sum vector->
. Vector->
Sum vector->
Performing ascending order arrangement to obtain ordered vector +.>
And ordered vector->
。
When step 1532 results in an ORB feature point coordinate matrix, the vector
Vector->
Ordered vector- >
Ordered vector->
。
Wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the smallest abscissa value, ++within the ORB feature point>
Represents the maximum abscissa value, ++within the ORB feature point>
Representing the smallest ordinate value,/-in ORB feature points>
Representing the largest ordinate value in the ORB feature point.
When the SIFT feature point coordinate matrix is obtained in step 1532, the vector
Vector quantity
Ordered vector->
Ordered vector->
。
Wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the smallest abscissa value, < > -in the SIFT feature point>
Represents the maximum abscissa value, < > -in the SIFT feature point>
Representing the smallest ordinate value,/-in the SIFT feature points>
The largest ordinate value in the SIFT feature point is indicated.
In step 1534, the vertex coordinates of the ROI region are determined by calculating the mean value of K neighboring points among all the coordinate values after the sequence arrangement. K is an integer greater than or equal to 1.
From ordered vectors
And->
In (1) respectively selecting>
Personal value and post->
The value is used as candidate coordinate value and is based on +.>
The mean of the values determines the vertex coordinates of the ROI area.
Taking ORB feature point coordinate matrix as an example, it can be based on
Calculating the vertex coordinates of the upper left corner of the ROI;
according to
Calculating the vertex coordinates of the right lower corner of the ROI;
wherein, the liquid crystal display device comprises a liquid crystal display device,
top-left corner vertex coordinates representing the region of the ROI, " >
Right lower corner vertex coordinates representing ROI region,/->
Indicating that a threshold is set.
If the SIFT feature point coordinate matrix is output in step 1532, the calculation method of the vertex coordinates of the ROI area is the same as above, and will not be described here again.
In step 1535, the ROI region is acquired based on the vertex coordinates.
And taking the rectangular frame area determined by the upper left corner vertex coordinates and the lower right corner vertex coordinates as the ROI area in the filling image.
After the ROI area is determined, other areas in the filling image are cut off, and only the ROI area is reserved, so that a cut image is obtained.
And 154, performing rotation correction on the cut image to obtain a rotation image.
In practical applications, although a user may preview an image through a WinForm window before photographing and adjust the direction of the paper material to be electronic in time, the paper material image to be electronic in the cut image may still have an inclination. Thus, it is necessary to perform rotation correction on the cut image to adjust the direction of the image of the paper material to be electronic.
Optionally, step 154 may include:
all line segments in the cut image are detected, and the angle values of all the line segments are respectively determined.
In the embodiment of the invention, all line segments in the cut image can be detected by using a Hough transform algorithm. When the Hough transformation algorithm is executed, each pixel point in the cut image is converted into a curve in the parameter space after Hough transformation by adopting a Hesse affine coordinate system. The corresponding curves of the pixel points in the same line segment are intersected on the same point, and the angle direction corresponding to the point is the angle value of the line segment. According to the curve distribution condition in the parameter space after Hough transformation, the line segment distribution condition in the cut image and the angle value of each line segment can be correspondingly obtained.
Alternatively, before all the line segments in the cut image are detected, the cut image may be subjected to an enlarging process in order to ensure the detection accuracy.
And calculating the rotation angle according to the angle value of the line segment.
Optionally, calculating the rotation angle according to the angle value of the line segment may include:
all line segments with angle values smaller than a preset value are determined to be first line segments;
and calculating an average value of the angle values corresponding to the first line segment, and determining the average value as a rotation angle.
The preset value may be set by itself, which is not particularly limited in the embodiment of the present invention. And calculating the average value of the angle values corresponding to all the first line segments to determine the rotation angle of the cut image.
And carrying out rotation correction on the cut image according to the rotation angle to obtain a rotation image.
And carrying out rotation correction on the whole cutting image according to the rotation angle, thereby obtaining a rotation image. By carrying out rotation correction on the cut image, the direction fine adjustment of the paper material image to be electronized can be realized, repeated manual adjustment photographing of a user is avoided, and the electronization efficiency of the paper material is improved.
It will be appreciated that the rotated image may include not only the target image, but also other images outside the outline of the outer boundary of the target image, for example, images corresponding to the paper in the paper material to be electronic. And finally, when the administrative approval business is carried out, only the material content image in the paper material to be electronically treated is needed. Thus, the outermost boundary contour in the rotation image and the outer boundary contour of the target image can be acquired in advance so as to facilitate the subsequent cutting work.
In acquiring the outermost boundary contour in the rotated image and the outer boundary contour of the target image, a contour extraction algorithm may be employed. It will be appreciated that other algorithms may be used for contour extraction, and embodiments of the present invention are not limited in this regard.
When acquiring a contour by using a contour extraction algorithm, a raster scanning method is used to scan a rotation image sequentially from the top left corner vertex, and for each pixel point in the rotation image, whether the pixel point is an outer boundary starting point or a hole boundary starting point is determined, and if the pixel point is an outer boundary starting point or an empty boundary starting point, boundary tracking is started until a complete outer boundary and a hole boundary are found. If the pixel point is neither an outer boundary point nor a hole boundary point, raster scanning is continued until scanning to the lower right corner vertex of the rotated image ends.
The outer boundary here is in fact the outermost boundary contour in the rotated image, and the hole boundary is in fact the outer boundary contour of the target image.
And step 156, cutting the rotation image according to the outermost boundary contour in the rotation image and the outer boundary contour of the target image to obtain the target image, and determining the target image as an electronic image.
Optionally, step 156 may include:
determining a region to be cut between the outermost boundary contour in the rotating image and the outer boundary contour of the target image according to the outermost boundary contour in the rotating image and the outer boundary contour of the target image;
and cutting the rotating image according to the region to be cut to obtain a target image.
And determining the area between the outermost boundary contour in the rotation image and the outer boundary contour of the target image as an area to be cut, and cutting off the area to be cut to obtain the target image. The target image is the electronic image required by the final transaction of administrative approval business.
Before the electronic image is displayed by the WEB application page of the browser, the electronic image is required to be compressed in binary stream by utilizing zgip compression technology, converted into a Base64 coding format, and then transmitted to the WEB application page of the browser for display in real time through a webchannel.
The whole paper material electronization processing process does not need a browser to carry out image processing work, the browser only needs to receive a first trigger action of a user, the trigger signal is transmitted to the multimedia application service, the multimedia application service executes the whole paper material electronization step, and the output electronized image is transmitted to a WEB application page of the browser to be displayed. Thereby reducing the running burden of the browser.
The embodiment of the invention establishes connection with the multimedia equipment; responding to a first triggering operation of a user on a WEB application page of a browser, and acquiring the equipment name of the multimedia equipment; opening the multimedia device according to the device name; responding to a second triggering operation of a user, and receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment; and performing image processing on the current frame image to obtain an electronic image, and displaying by adopting a WEB application page of the browser. The method comprises the steps that a process of executing paper material electronization is started through a first trigger operation of a user on a WEB application page of a browser, after an electronized image is obtained, the WEB application page is displayed, the whole processing process is free of browser participation, the calculation burden of the browser can be greatly reduced, the phenomenon that the browser is blocked is avoided, and the working efficiency of handling administrative approval business is improved. In addition, the browser is only responsible for receiving the first trigger operation and displaying the electronic image, so the processing method is not limited to the IE browser, and any browser capable of carrying out data transmission can be supported.
Furthermore, the embodiment of the invention also provides a rotation correction step in the image processing process, and can carry out rotation correction on the cut image so as to avoid the phenomenon that the paper material to be electronic is inclined and needs repeated manual adjustment by a user, thereby further improving the office efficiency.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 4 is a schematic structural diagram of an electronic processing device for paper materials according to an embodiment of the present invention, and for convenience of explanation, only the portions related to the embodiment of the present invention are shown, which is described in detail below:
as shown in fig. 4, the paper material electronization processing apparatus 4 includes: a connection module 41, a response module 42 and a processing module 43.
A connection module 41 for establishing a connection with a multimedia device;
the response module 42 is configured to obtain a device name of the multimedia device in response to a first triggering operation of the user on a WEB application page of the browser;
A response module 42, further configured to open the multimedia device according to the device name;
the processing module 43 is configured to receive a current frame image corresponding to the paper material to be electronic sent by the multimedia device, in response to a second trigger operation of the user;
the processing module 43 is further configured to perform image processing on the current frame image to obtain an electronic image, and display the electronic image by using a WEB application page of the browser.
In a possible implementation manner, the processing module 43 is configured to perform graying and binarization processing on the current frame image to obtain a binarized image;
the processing module 43 is further configured to detect a paper boundary contour in the binarized image, and perform color filling on the binarized image according to the paper boundary contour to obtain a filled image;
the processing module 43 is further configured to obtain an ROI area in the filling image, and crop the filling image to obtain a cropped image including the ROI area;
the processing module 43 is further configured to perform rotation correction on the cropped image to obtain a rotation image;
the processing module 43 is further configured to acquire an outermost boundary contour in the rotation image and an outer boundary contour of the target image; the target image is a material content image in the paper material to be electronic;
The processing module 43 is further configured to cut the rotation image according to the outermost boundary contour in the rotation image and the outer boundary contour of the target image, obtain the target image, and determine the target image as an electronic image.
In one possible implementation, the processing module 43 is configured to detect all line segments in the cropped image, and determine angle values of all line segments respectively;
the processing module 43 is further configured to calculate a rotation angle according to the angle value of the line segment;
the processing module 43 is further configured to perform rotation correction on the cropped image according to the rotation angle, so as to obtain a rotation image.
In a possible implementation manner, the processing module 43 is configured to determine all line segments with angle values smaller than a preset value as the first line segment;
the processing module 43 is further configured to calculate an average value of the angle values corresponding to the first line segment, and determine the average value as the rotation angle.
In a possible implementation manner, the processing module 43 is configured to determine a region to be cropped between the outermost boundary contour in the rotated image and the outer boundary contour of the target image according to the outermost boundary contour in the rotated image and the outer boundary contour of the target image;
the processing module 43 is further configured to cut the rotation image according to the region to be cut, so as to obtain a target image.
In one possible implementation, the response module 42 is configured to acquire and adjust display parameters of the multimedia device;
the response module 42 is further configured to receive each frame of image of the paper data to be electronic sent by the multimedia device in real time; the display format of each frame of image is determined by the display parameters;
the response module 42 is further configured to compress each frame of image and present the compressed image in real time.
In one possible implementation, the processing module 43 is configured to downsample the filling image to generate a pyramid image;
the processing module 43 is further configured to sort the coordinate values of all the feature points in the horizontal direction and the vertical direction, so as to obtain all the coordinate values after being arranged in sequence;
the processing module 43 is further configured to determine vertex coordinates of the ROI area by calculating an average value of K neighboring points among all coordinate values after the sequential arrangement; k is an integer greater than or equal to 1;
the processing module 43 is further configured to obtain the ROI area according to the vertex coordinates.
The embodiment of the invention is used for establishing connection with the multimedia equipment through the connection module 41; the response module 42 is configured to obtain a device name of the multimedia device in response to a first triggering operation of the user on a WEB application page of the browser; a response module 42, further configured to open the multimedia device according to the device name; the processing module 43 is configured to receive a current frame image corresponding to the paper material to be electronic sent by the multimedia device, in response to a second trigger operation of the user; the processing module 43 is further configured to perform image processing on the current frame image to obtain an electronic image, and display the electronic image by using a WEB application page of the browser. The method comprises the steps that a process of executing paper material electronization is started through a first trigger operation of a user on a WEB application page of a browser, after an electronized image is obtained, the WEB application page is displayed, the whole processing process is free of browser participation, the calculation burden of the browser can be greatly reduced, the phenomenon that the browser is blocked is avoided, and the working efficiency of handling administrative approval business is improved. In addition, the browser is only responsible for receiving the first trigger operation and displaying the electronic image, so the processing method is not limited to the IE browser, and any browser capable of carrying out data transmission can be supported.
Furthermore, the embodiment of the invention also provides a rotation correction step in the image processing process, and can carry out rotation correction on the cut image so as to avoid the phenomenon that the paper material to be electronic is inclined and needs repeated manual adjustment by a user, thereby further improving the office efficiency.
Fig. 5 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 5, the terminal 5 of this embodiment includes: a processor 50, a memory 51 and a computer program 52 stored in said memory 51 and executable on said processor 50. The processor 50, when executing the computer program 52, performs the steps of the various embodiments of the processing method for electronizing paper materials described above, such as steps 101 through 105 shown in fig. 1. Alternatively, the processor 50, when executing the computer program 52, performs the functions of the modules/units of the apparatus embodiments described above, such as the functions of the modules 41 to 43 shown in fig. 4.
By way of example, the computer program 52 may be partitioned into one or more modules/units that are stored in the memory 51 and executed by the processor 50 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions describing the execution of the computer program 52 in the terminal 5. For example, the computer program 52 may be split into modules 41 to 43 shown in fig. 4.
The terminal 5 may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The terminal 5 may include, but is not limited to, a processor 50, a memory 51. It will be appreciated by those skilled in the art that fig. 5 is merely an example of the terminal 5 and is not limiting of the terminal 5, and may include more or fewer components than shown, or may combine some components, or different components, e.g., the terminal may further include input and output devices, network access devices, buses, etc.
The processor 50 may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field-programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 51 may be an internal storage unit of the terminal 5, such as a hard disk or a memory of the terminal 5. The memory 51 may be an external storage device of the terminal 5, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the terminal 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the terminal 5. The memory 51 is used for storing the computer program as well as other programs and data required by the terminal. The memory 51 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on this understanding, the present invention may also be implemented by implementing all or part of the above-described embodiment method, or by implementing relevant hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may be executed by a processor, where the computer program may implement the steps of the above-described paper material electronic processing method embodiments. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A method of processing paper material electronically, for use in a terminal, the method comprising:
establishing a connection with a multimedia device;
responding to a first triggering operation of a user on a WEB application page of a browser, and acquiring the equipment name of the multimedia equipment;
opening the multimedia device according to the device name;
responding to a second triggering operation of a user, and receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment;
and performing image processing on the current frame image to obtain an electronic image, and displaying by adopting a WEB application page of a browser.
2. The method for processing the electronic paper material according to claim 1, wherein the image processing the current frame image to obtain an electronic image comprises:
carrying out graying and binarization processing on the current frame image to obtain a binarized image;
detecting the paper boundary contour in the binarized image, and performing color filling on the binarized image according to the paper boundary contour to obtain a filled image;
acquiring an ROI (region of interest) in the filling image, and cutting the filling image to obtain a cut image containing the ROI;
Performing rotation correction on the cut image to obtain a rotation image;
acquiring the outermost boundary contour in the rotation image and the outer boundary contour of the target image; the target image is a material content image in the paper material to be electronic;
and cutting the rotation image according to the outermost boundary contour in the rotation image and the outer boundary contour of the target image to obtain the target image, and determining the target image as the electronic image.
3. The method of claim 2, wherein the performing rotational correction on the cut image to obtain a rotated image comprises:
detecting all line segments in the cut image, and respectively determining the angle values of all the line segments;
calculating a rotation angle according to the angle value of the line segment;
and carrying out rotation correction on the cut image according to the rotation angle to obtain the rotation image.
4. A method of processing a paper material according to claim 3, wherein calculating the rotation angle from the angle value of the line segment comprises:
all line segments with angle values smaller than a preset value are determined to be first line segments;
And calculating an average value of the angle values corresponding to the first line segment, and determining the average value as the rotation angle.
5. The method of processing the paper material according to claim 2, wherein the cutting the rotated image based on the outermost boundary contour in the rotated image and the outer boundary contour of the target image to obtain the target image includes:
determining a region to be cut between the outermost boundary contour in the rotating image and the outer boundary contour of the target image according to the outermost boundary contour in the rotating image and the outer boundary contour of the target image;
and cutting the rotation image according to the region to be cut to obtain a target image.
6. The method according to claim 1, further comprising, before receiving the current frame image corresponding to the paper material to be electronic sent by the multimedia device in response to the second trigger operation of the user:
acquiring and adjusting display parameters of the multimedia equipment;
receiving each frame of image of the paper data to be electronic sent by the multimedia equipment in real time; the display format of each frame of image is determined by the display parameters;
And compressing each frame of image, and presenting the compressed image in real time.
7. The method of processing paper material according to claim 2, wherein the acquiring the ROI area in the fill image comprises:
downsampling the filling image to generate a pyramid image;
ORB feature points or SIFT feature points are extracted from the pyramid image;
ordering the coordinate values of all the characteristic points according to the horizontal direction and the vertical direction respectively to obtain all the coordinate values after ordered arrangement;
in all the coordinate values after the sequential arrangement, the vertex coordinates of the ROI area are determined by calculating the average value of K adjacent points; the K is an integer greater than or equal to 1;
and acquiring the ROI area according to the vertex coordinates.
8. An apparatus for electronically processing a paper material, comprising:
the connection module is used for establishing connection with the multimedia equipment;
the response module is used for responding to a first triggering operation of a user on a WEB application page of the browser and acquiring the equipment name of the multimedia equipment;
the response module is further used for opening the multimedia device according to the device name;
The processing module is used for responding to a second triggering operation of a user and receiving a current frame image corresponding to the paper material to be electronic sent by the multimedia equipment;
the processing module is also used for carrying out image processing on the current frame image to obtain an electronic image, and displaying the electronic image by adopting a WEB application page of a browser.
9. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, realizes the steps of the method for processing paper material into electrons according to any of the preceding claims 1 to 7.
10. A computer-readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the method for the electronization of paper materials according to any one of the preceding claims 1 to 7.
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