CN103136785A - Human body medical model three-dimensional visualization system used for mobile terminal and realizing method thereof - Google Patents
Human body medical model three-dimensional visualization system used for mobile terminal and realizing method thereof Download PDFInfo
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Abstract
The invention discloses a human body medical model three-dimensional visualization system used for a mobile terminal and a realizing method thereof and belongs to the technical field of information processing. The human body medical model three-dimensional visualization system used for the mobile terminal comprises a modeling module, a data compaction module, a memory management module and a three-dimensional display module, wherein the modeling module and the data compaction module are realized on a server-side, and the memory management module and the three-dimensional display module are realized on the mobile terminal. The modeling module is used for modeling and generating a three-dimensional human body medical model file according to a medical section image. The three-dimensional human body medical model file is transmitted to the three-dimensional display module after redundant information is removed through the data compaction module. The three-dimensional display module is used for achieving imaging operation of the three-dimensional model according to touch operation of a user. The memory management module is connected with a memory management device of the mobile terminal and is used for real-time tracking of internal memory of the mobile terminal. According to the human body medical model three-dimensional visualization system used for the mobile terminal and the realizing method thereof, three-dimensional visualization control of the medical model is enabled to be smooth and flexible on a mobile terminal platform for the user, and important technical support is provided for the development of software relevant to three-dimensional visualization of the three-dimensional medical model, wherein the software is applied to mobile platforms.
Description
Technical field
What the present invention relates to is a kind of system and method for mobile message processing technology field, specifically a kind of human medical model three-dimension visible sysem and its implementation for mobile terminal.
Background technology
Universal work and the life that greatly facilitates people rapidly of mobile electronic device.Mobile-terminal platform has the advantages that as smart mobile phone, panel computer screen is large, support multi-point touch, for the portable medical solution provides good support.Moving computer-aided diagnosis (CAD) software on mobile platform will help the clinician to diagnose quickly and efficiently and check.Development along with the computer-aided diagnosis technology, the 3 D human body medical model that builds based on medical image (images such as CT, MRI) makes the clinician understand more intuitively human anatomic structure or illness situation, and the visual of 3 D human body medical model provides more flexible for clinical, but multi-angle observation, control the man-machine interaction means of medical model, have a wide range of applications in clinical practice and medical teaching.
The more common engineering mould shapes of 3 D human body medical model is irregular, usually the file data amount of this class model is larger, application software is developed on microcomputer platform and is realized the visual operation of 3 D human body medical model, as model translation, convergent-divergent and rotation etc., can take larger Installed System Memory space.If directly software transplanting is moved to mobile-terminal platform, will be subject to the restriction of mobile terminal memory size, man-machine interaction occurs and control time delay, situation about even can't move.
find through the retrieval to prior art, China Patent Publication No. CN101976458A, open day 2011-02-16, put down in writing a kind of " being applied to the medical image three-dimensional visualization method of mobile hand-held device ", this technology connects to set up network by the server/customer end mode, there is medical science two dimension layer data collection on server and arranges the medical image list that obtains according to this data set, the client that runs on mobile hand-held device is rebuild medical image according to user's operational order Control Server, and be shown to the user by client, realization is at the medical image three-dimensional visualization of mobile hand-held device.The deficiency of this technology is that the three-dimensional visualization of medical model can not directly move and completes on mobile platform, need place one's entire reliance upon and be stored in two-dimentional medical science layer data on server, and complete the operation of three-dimensional visualization on server, actual the solution reduced medical model at the shared running memory of mobile platform three-dimensional visualization;
China Patent Publication No. CN101937397A, open day 2011-01-05, put down in writing a kind of " mobile intelligent terminal and dynamic memory management method thereof ", the dynamic memory management unit of this terminal when mobile intelligent terminal is started shooting for the first time, carries out internal memory initialization, otherwise according to the actual behaviour in service of user to internal memory, memory configurations is dynamically adjusted, and counting user stores to the actual behaviour in service of this mobile intelligent terminal internal memory the situation that the user uses internal memory during shutdown.But, this patent is only machine-processed for the memory management of common software routine on mobile terminal device, the committed memory of Consideration of Three-dimensional medical model space own is not huge, realize the three-dimensional visualization of this class model is more needed enough running memory supports on mobile terminal, control delay otherwise the user will occur, the problem that even can't move.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of human medical model three-dimension visible sysem and its implementation for mobile terminal proposed, make the user more smooth and flexible to controlling of medical model three-dimensional visualization on mobile-terminal platform, also will provide the important technology support for the related software exploitation that relates to 3 D medical model three-dimensional visualization of using towards mobile platform.
The present invention is achieved by the following technical solutions:
the present invention relates to a kind of human medical model three-dimension visible sysem for mobile terminal, comprise: in MBM and the data compaction module of server end realization, the memory management module that realizes on mobile terminal and 3-D display module, wherein: MBM is according to the medical science section image, modeling generating three-dimensional human medical model file, after removing redundant information, the data compaction module exports the 3-D display module to, the 3-D display module realizes graphical operation to three-dimensional model according to user's touch operation, memory management module is connected with the memory manager of described mobile terminal, internal memory to mobile terminal carries out real-time follow-up, when the free memory value of memory size during less than threshold value, to internal memory manager request releasing memory space.
described MBM comprises: the section image construction unit that connects successively, curved surface processing unit and optimization unit, wherein: the section image construction unit is based on the medical science section image, use medical image three-dimensional reconstruction software, continuous medical science section image is rebuild generated the triangular surface patch grid model, the curved surface processing unit carries out the curved surface processing with the triangular surface patch grid model, generate anthropotomical surface model, by being filled, occluding surface generates anthropotomical solid model, model is after treatment exported with STL form (STereo Lithography), optimizing the unit adopts the man-machine interactively mode of operation to simplify to reduce described model point cloud quantity to the model of STL form, and generate the STL model file to the data compaction module.
Described data compaction module comprises: format conversion unit and remove redundancy unit, wherein: format conversion unit is converted to STL model compression file the model file of 3DS form, by going redundancy unit that the output model file is removed and generated to the characteristic attribute in the model file of 3DS form to display module.
Described memory management module comprises: internal memory monitoring unit and internal memory releasing unit, wherein: but the internal memory monitoring unit is connected with the memory manager of described mobile terminal and receives current storage allocation number and the current number of storage allocation, when both ratios send the request of internal memory overload and internal memory limit expectation to the internal memory releasing unit during less than the memory management threshold value, the internal memory releasing unit sends to mobile terminal operating system and stops stopping other movable instruction in Installed System Memory after receiving the request of internal memory overload.
Described 3-D display module comprises: document reading unit, play up display unit and gesture identification unit, wherein: document reading unit obtains the three-dimensional model file and reads in the mobile terminal internal memory from server end; Play up display unit and by the graphics system of calling OpenGL-ES shape library and mobile terminal, the three-dimensional model file is graphically shown, and add light source and process and play up processing; The gesture identification unit reads the touch operation information that mobile terminal collects, and feeds back to after the judgement to the number of touch point, the speed that moves and distance etc. and plays up display unit, realizes rotation, the zooming and panning operation of 3 D medical model.
The present invention relates to the implementation method of said system, comprise following several step:
The first step is set up the 3 D human body medical model, and the some cloud quantity of adjustment model intermediate cam dough sheet specifically comprises:
1.1) the section image construction unit is redeveloped into the triangular surface patch grid model with continuous medical science section image, generates corresponding 3 D medical model file;
1.2) the curved surface processing unit carries out the curved surface processing to the triangular surface patch grid model, and occluding surface is filled, and generates the solid model of STL form;
1.3) optimize the unit by manually reducing solid model point cloud quantity, when making model forms feature after adjustment conform to corresponding medical model, reduce the file size of the 3 D human body medical model of generation.
Second step is converted into the 3DS form with the STL formatted file of the 3 D human body medical model that generates;
In the 3rd step, removing from 3DS form model file does not affect the normal characteristic attribute that shows of 3 D human body medical model, and the some cloud positional information of reserving model is only namely put the three-dimensional coordinate data of cloud;
the 4th step, document reading unit is by the reading model file, utilize the iostream of the operating system of mobile terminal model file to be read in the internal memory of mobile terminal, by playing up display unit, the three-dimensional model in internal memory is shown on screen, play up for model and process and add pointolite, the gesture identification unit reads the screen operator information that mobile terminal obtains, obtain image coordinate axle mapping related information and export to playing up display unit through logic analysis, by playing up the display unit realization to the translation of three-dimensional model, the graphical operation such as convergent-divergent and rotation,
The 5th step, when the free memory value of memory size during less than the threshold value set, except display unit required word and operation interface are played up in reservation, close successively the active module of stopping in the mobile terminal internal memory, it is required with the operation of capable of meeting requirements on three-dimensional model visualization that dynamic release goes out memory headroom.
Described dynamic release refers to: when the 3 D human body medical model after visual end, be that mobile terminal is when withdrawing from the visual process of modulated use, perhaps when the operating system desktop of mobile terminal is returned in user's operation, namely return or during ESC Escape, discharge the shared memory headroom that comprises three-dimensional model and pinup picture by memory management module when the user presses.
Technique effect
Compared with prior art, the present invention processes by document format conversion and data compaction to the 3 D medical model, reduce greatly the storage size by the 3 D medical model file of medical image generation, again by set up memory management mechanism in the operating system of mobile terminal device, effectively reduce the 3 D human body medical model and realize the operation committed memory of three-dimensional visualization on mobile terminal device, make the user control medical model more smooth and flexible.
The present invention is that when realizing that for solution the 3 D human body medical model is visual on mobile-terminal platform, the limited problem of memory size that breaks through mobile terminal proposes.Mobile-terminal platform provides good support for the portable medical solution, but its limited memory headroom makes the 3 D medical model that accounts for larger storage space be difficult to realize the smooth and easy operation of three-dimensional visualization.So EMS memory occupation method that reduces the operation of 3 D medical model three-dimensional visualization on mobile-terminal platform of the present invention's proposition, by reducing the size of 3 D medical model file, set up mobile terminal operating system internal memory monitoring and releasing mechanism, 5～10MB memory headroom can be reduced at most when making a 3 D medical model file operation, the internal memory that major part takies can be discharged when file withdraws from.More smoothness is freely when operation model for the user.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the embodiment schematic flow sheet.
Embodiment
The below elaborates to embodiments of the invention, and the present embodiment is implemented under take technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
as shown in Figure 1, the present embodiment relates to a kind of human medical model three-dimension visible sysem for mobile terminal, comprise: in MBM and the data compaction module of server end realization, the memory management module that realizes on mobile terminal and 3-D display module, wherein: MBM is according to the medical science section image, modeling generating three-dimensional human medical model file, after removing redundant information, the data compaction module exports the 3-D display module to, the 3-D display module realizes graphical operation to three-dimensional model according to user's touch operation, memory management module is connected with the memory manager of described mobile terminal, internal memory to mobile terminal carries out real-time follow-up, when the free memory value of memory size during less than threshold value, to internal memory manager request releasing memory space.
described MBM comprises: the section image construction unit that connects successively, curved surface processing unit and optimization unit, wherein: the section image construction unit is based on the medical science section image, use medical image three-dimensional reconstruction software, continuous medical science section image is rebuild generated the triangular surface patch grid model, the curved surface processing unit carries out the curved surface processing with the triangular surface patch grid model, generate anthropotomical surface model, by being filled, occluding surface generates anthropotomical solid model, model after treatment is with the STL formatted output, optimizing the unit adopts the man-machine interactively mode of operation to simplify to reduce described model point cloud quantity to the model of STL form, need in operating process to guarantee that in the range estimation mode 3 D medical model is undistorted, make the model forms feature after adjustment conform to corresponding medical model, and generate the STL model file to the data compaction module.
Described data compaction module comprises: format conversion unit and remove redundancy unit, wherein: format conversion unit is converted to STL model compression file the model file of 3DS form, by going redundancy unit that the output model file is removed and generated to the characteristic attribute in the model file of 3DS form to display module;
Described characteristic attribute comprises: material, color, texture, light sensation attribute.
Described memory management module comprises: internal memory monitoring unit and internal memory releasing unit, wherein: but the internal memory monitoring unit is connected with the memory manager of described mobile terminal and receives current storage allocation number and the current number of storage allocation, when both ratios send the request of internal memory overload and internal memory limit expectation to the internal memory releasing unit during less than the memory management threshold value, the internal memory releasing unit sends to mobile terminal operating system and stops stopping other movable instruction in Installed System Memory after receiving the request of internal memory overload.
Described memory management threshold value can storage allocation and the ratio preset value of storage allocation; The expectation of described internal memory limit refers to: but the difference of memory management threshold value and the ratio of current storage allocation number and the current number of storage allocation.
Described 3-D display module comprises: document reading unit, play up display unit and gesture identification unit, wherein: document reading unit obtains the three-dimensional model file and reads in the mobile terminal internal memory from server end; Playing up display unit graphically shows the three-dimensional model file by calling OpenGL-ES shape library and mobile terminal figure system; The gesture identification unit reads the touch operation information that mobile terminal collects, and feeds back to after the judgement to the number of touch point, the speed that moves and distance etc. and plays up display unit, realizes rotation, the zooming and panning operation of 3 D medical model.
Native system is realized in the following manner:
The first step is set up three-dimensional femur model, the some cloud quantity of adjustment model intermediate cam dough sheet.Using medical image three-dimensional reconstruction software, is the triangular surface patch grid model with the three dimensional CT data reconstruction of femur, according to the morphological feature of femur, model is carried out shirtsleeve operation, makes model meet real standard skeletal shape.The triangular surface patch grid model data is carried out the curved surface processing, occluding surface is filled, cut apart complete femur model according to different classification of fracture, generate the point cloud model of femoral fracture.By controlling the some cloud quantity in the femoral fracture model and other constraint conditions of model being set, farthest reduce some cloud quantity, in this example, the quantity of tri patch is adjusted into original half.Need in operating process to guarantee that in the range estimation mode three-dimensional femoral fracture model is undistorted, make the model forms feature after adjustment conform to corresponding skeleton model, and generation STL form model file.This operation can reduce by nearly 50% some cloud quantity, makes the model file size of generation reduce approximately 50%.
Second step, the form of conversion human femur under loading model file.The STL formatted file of femoral fracture model is changed into the 3DS form, can reduce the file size of master mould file 90%.By repeatedly implementing the cloud quantity that reduces in the first step, make within the file size of 3DS form is controlled at 1MB.
The 3rd step, the non-characteristic attribute data of deleting three-dimensional femoral fracture model.Remove from the fracture model file of 3DS form and do not affect the normal unnecessary characteristic attribute that shows of three-dimensional femoral fracture model: the material properties of model, color, texture, light sensation attribute etc., the point cloud positional information of reserving model is only namely put the three-dimensional coordinate data of cloud.These deleted fracture characteristic attributes can be unified simulation and pinup picture in software, render a display effect preferably with making.
In the 4th step, realize the three-dimensional model display module: comprise playing up and showing of the reading of model file, three-dimensional model file, and gesture identification.Document reading unit utilizes the iostream of the operating system of mobile terminal model file to be read in the internal memory of mobile terminal by the reading model file.By playing up display unit, the three-dimensional model in internal memory is shown on screen, and added the surperficial pinup picture of yellowish-white gradual change for model, make the result of demonstration more near real bone.Play up display unit also can add pointolite in three-dimensional environment illumination mechanism, make shade naturally appear at bone surface, simultaneously whole background environment can be covered by blue white gradient color picture, has realized display effect more true to nature.The information about user's operation that gesture identification unit reading system obtains, obtain image coordinate axle mapping related information and export to playing up display unit by logic analysis simply, realize the basic translation of femoral fracture model, convergent-divergent and rotary manipulation by playing up display unit.
In the 5th step, realize the monitoring function to the mobile terminal system internal memory.When the three-dimensional femoral fracture model visualization operation of program design, system's Real Time Monitoring current residual memory size is set, when the free memory value of memory size during less than the threshold value (being low memory) set, except reservation relates to femoral fracture model three-dimensional visualization required word and operation interface, according to the setting order, close successively the active module of stopping in Installed System Memory, dynamic release goes out memory headroom to greatest extent, and is required with the operation of capable of meeting requirements on three-dimensional model visualization.
The 6th goes on foot, and sets up the internal memory releasing mechanism of mobile terminal operating system.Whenever certain femoral fracture model after visual operation finishes voluntarily, be that the visual process of routine call is when withdrawing from, perhaps when application module is returned to last time in user operation, namely when pressing, the user returns or during ESC Escape, the system that arranges discharges and relates to the shared storage space of this 3 D medical model visualization, the data space that comprises three-dimensional femoral fracture model and bone material pinup picture background can discharge approximately 2～5Mb memory headroom size like this.
Claims (9)
1. human medical model three-dimension visible sysem that is used for mobile terminal, it is characterized in that, comprise: in MBM and the data compaction module of server end realization, the memory management module that realizes on mobile terminal and 3-D display module, wherein: MBM is according to the medical science section image, modeling generating three-dimensional human medical model file, after removing redundant information, the data compaction module exports the 3-D display module to, the 3-D display module realizes graphical operation to three-dimensional model according to user's touch operation, memory management module is connected with the memory manager of described mobile terminal, internal memory to mobile terminal carries out real-time follow-up, when the free memory value of memory size during less than threshold value, to internal memory manager request releasing memory space.
2. system according to claim 1, it is characterized in that, described MBM comprises: the section image construction unit that connects successively, curved surface processing unit and optimization unit, wherein: the section image construction unit is based on the medical science section image, use medical image three-dimensional reconstruction software, continuous medical science section image is rebuild generated the triangular surface patch grid model, the curved surface processing unit carries out the curved surface processing with the triangular surface patch grid model, generate anthropotomical surface model, by being filled, occluding surface generates anthropotomical solid model, model after treatment is with the STL formatted output, optimizing the unit adopts the man-machine interactively mode of operation to simplify to reduce described model point cloud quantity to the model of STL form, and generate the STL model file to the data compaction module.
3. system according to claim 1, it is characterized in that, described data compaction module comprises: format conversion unit and remove redundancy unit, wherein: format conversion unit is converted to STL model compression file the model file of 3DS form, by going redundancy unit that the output model file is removed and generated to the characteristic attribute in the model file of 3DS form to display module;
Described characteristic attribute comprises: material, color, texture, light sensation attribute.
4. system according to claim 1, it is characterized in that, described memory management module comprises: internal memory monitoring unit and internal memory releasing unit, wherein: but the internal memory monitoring unit is connected with the memory manager of described mobile terminal and receives current storage allocation number and the current number of storage allocation, when both ratios send the request of internal memory overload and internal memory limit expectation to the internal memory releasing unit during less than the memory management threshold value, the internal memory releasing unit is after receiving the request of internal memory overload, send to mobile terminal operating system and stop stopping other movable instruction in Installed System Memory.
5. system according to claim 1, is characterized in that, described memory management threshold value can storage allocation and the ratio preset value of storage allocation; The expectation of described internal memory limit refers to: but the difference of memory management threshold value and the ratio of current storage allocation number and the current number of storage allocation.
6. system according to claim 1, it is characterized in that, described 3-D display module comprises: document reading unit, play up display unit and gesture identification unit, wherein: document reading unit obtains the three-dimensional model file and reads in the mobile terminal internal memory from server end; Playing up display unit graphically shows the three-dimensional model file by calling OpenGL-ES shape library and mobile terminal figure system; The gesture identification unit reads the touch operation information that mobile terminal collects, and feeds back to after the judgement to the number of touch point, the speed that moves and distance etc. and plays up display unit, realizes rotation, the zooming and panning operation of 3 D medical model.
7. the implementation method according to the described system of above-mentioned arbitrary claim, is characterized in that, comprises following several step:
The first step is set up the 3 D human body medical model, the some cloud quantity of adjustment model intermediate cam dough sheet;
Second step is converted into the 3DS form with the STL formatted file of the 3 D human body medical model that generates;
In the 3rd step, removing from 3DS form model file does not affect the normal characteristic attribute that shows of 3 D human body medical model, and the some cloud positional information of reserving model is only namely put the three-dimensional coordinate data of cloud;
The 4th step, document reading unit is by the reading model file, utilize the iostream of the operating system of mobile terminal model file to be read in the internal memory of mobile terminal, by playing up display unit, the three-dimensional model in internal memory is shown on screen, play up for model and process and add pointolite, the gesture identification unit reads the screen operator information that mobile terminal obtains, obtain image coordinate axle mapping related information and export to playing up display unit through logic analysis, by playing up the display unit realization to translation, convergent-divergent and the rotary manipulation of three-dimensional model;
The 5th step, when the free memory value of memory size during less than the threshold value set, except display unit required word and operation interface are played up in reservation, close successively the active module of stopping in the mobile terminal internal memory, it is required with the operation of capable of meeting requirements on three-dimensional model visualization that dynamic release goes out memory headroom.
8. method according to claim 7, is characterized in that, the described first step specifically comprises:
1.1) the section image construction unit is redeveloped into the triangular surface patch grid model with continuous medical science section image, generates corresponding 3 D medical model file;
1.2) the curved surface processing unit carries out the curved surface processing to the triangular surface patch grid model, and occluding surface is filled, and generates the solid model of STL form;
1.3) optimize the unit by manually reducing solid model point cloud quantity, when making model forms feature after adjustment conform to corresponding medical model, reduce the file size of the 3 D human body medical model of generation.
9. method according to claim 7, it is characterized in that, described dynamic release refers to: when the 3 D human body medical model after visual end, be that mobile terminal is when withdrawing from the visual process of modulated use, perhaps when the operating system desktop of mobile terminal is returned in user's operation, namely return or during ESC Escape, discharge the shared memory headroom that comprises three-dimensional model and pinup picture by memory management module when the user presses.
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