CN113589929A - Spatial distance measuring method and system based on HoloLens equipment - Google Patents
Spatial distance measuring method and system based on HoloLens equipment Download PDFInfo
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- CN113589929A CN113589929A CN202110866958.9A CN202110866958A CN113589929A CN 113589929 A CN113589929 A CN 113589929A CN 202110866958 A CN202110866958 A CN 202110866958A CN 113589929 A CN113589929 A CN 113589929A
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/017—Gesture based interaction, e.g. based on a set of recognized hand gestures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
- G06F3/04815—Interaction with a metaphor-based environment or interaction object displayed as three-dimensional, e.g. changing the user viewpoint with respect to the environment or object
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/0486—Drag-and-drop
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Abstract
The invention provides a spatial distance measuring method based on a HoloLens device, which comprises the following steps: generating a spatial map (spatial map) of an environment to be measured by using the physical space mapping of the HoloLens; selecting a plurality of points to be measured in space through gesture control; mapping the spatial positions of a plurality of points to be measured into a spatial map (spatial map), and further mapping the spatial positions into a spatial coordinate system in which the spatial map (spatial map) is located; and calculating the distance between the points in the space coordinate system to further obtain the actual distance in the real space. The measuring method is not limited by the field environment, effectively avoids the problems which cannot be solved in various conventional modes such as shielding, environment change, unavailable measuring points and the like, and realizes easy and accurate spatial distance measurement.
Description
Technical Field
The invention relates to the technical field of mixed reality, in particular to a spatial distance measuring method based on a HoloLens device.
Background
The traditional spatial distance measurement needs stable medium, no matter uses scale direct measurement, still uses the radar, and reflection wave modes such as laser are measured, and in the environment of coping with complicacy and changeablely, separate to hinder like natural environment or building, the stream of people flows and shuttles back and forth the change, and when the user equipment can't be erect to environmental condition, all can't carry out effectual spatial distance measurement. Distance calculation based on GPS coordinate information is subject to satellite searching conditions and can only be used for plane distance measurement with sub-meter precision. The spatial measurement method based on the HoloLens equipment can deal with complex and variable environments and easily obtain a spatial three-dimensional distance measurement result with centimeter-level precision. The operation is convenient, the requirement on the environment is low, and the effective range is larger than that of modes such as laser measurement.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a spatial distance measurement technique based on a HoloLens device, which aims to easily obtain a spatial stereo distance measurement result with centimeter-level accuracy in a complex and variable environment.
In order to solve the technical problem, the technical scheme adopted by the application is as follows:
a spatial distance measuring method based on HoloLens equipment comprises the following steps:
generating a spatial map (spatial map) of an environment to be measured by using the physical space mapping of the HoloLens; selecting a plurality of points to be measured in space through gesture control; mapping the space position of a point to be measured into a space map (spatial map), and further mapping into a space coordinate system of the space map (spatial map); and calculating the distance between each point in the space coordinate system, and further obtaining the actual distance in the real space.
Further, a tool developed by the unity engine is utilized, the tool adopts the uwp model of unity and is deployed on the HoloLens device, and the spatial map (spatial map) is placed under the world coordinates of the unity engine during measurement to provide a basis for operation calculation.
Further, when the measuring point is selected, a surface collision body (mesh collision) is added to the spatial map (spatial map), and then the surface collision body (mesh collision) is triggered by using a dragging or clicking gesture to perform ray collision detection, so that the measuring point is selected.
Further, for each point to be measured, a tag instance will be generated at the same location in virtual space. And generating line segment connection between the label instances which are added in sequence. And calculating the distance according to the label instance and the line segment under the world coordinate system of the unity engine, and reflecting the corresponding spatial distance.
Further, for the label example, except the first one, a floating label is added below the label example, and when the sight line or the gesture ray is aligned with the label example, the floating label appears to display the distance between the measuring points in the current segment; the floating label is hidden when a line of sight or gesture ray leaves the instance label. For the tag example, when the last tag is not the first tag, a fixed tag is displayed above it, noting the accumulated length between all current lines.
Furthermore, for the fixed label, a function key is added beside the fixed label, and a measurement display whole formed between the label example of the measurement point and the connecting line can be deleted or reserved in the space.
Furthermore, the precision of the measured distance can reach the centimeter level.
The embodiment of the present application further provides a spatial distance measuring system based on the HoloLens device, including:
the system comprises a to-be-measured environment generating module, a spatial map generating module and a mapping module, wherein the to-be-measured environment generating module is used for generating a spatial map (spatial map) of an environment to be measured by using the physical space mapping of the HoloLens;
the space map mapping module is used for selecting a plurality of points to be measured in a space through gesture control, and mapping the space positions of the plurality of points to be measured into a space map (spatial map), and further mapping the space positions into a space coordinate system of the space map (spatial map);
and the space distance calculation module is used for calculating the distance between each point in the space coordinate system so as to obtain the actual distance in the real space.
An embodiment of the present application further provides a HoloLens electronic device, including: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the spatial distance measuring method according to any one of claims 1 to 8.
The invention has the beneficial effects that: the method comprises the steps of generating a spatial map (spatial map) of an environment to be measured by means of physical space mapping of HoloLens, and mapping the spatial map (spatial map) into a spatial coordinate system. And calculating the distance between the points in the space coordinate system to further obtain the actual distance in the real space. The problem that the conventional methods such as shielding, environment change and unavailable measuring points cannot solve is effectively solved, and the light and accurate spatial distance measurement is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is an execution schematic diagram of a spatial distance measuring method based on a HoloLens device dragging and creating a measuring point according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a single-stage spatial distance measurement test of a spatial distance measurement method based on a HoloLens device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a multi-segment spatial distance measurement test of a spatial distance measurement method based on a HoloLens device according to an embodiment of the present invention.
Fig. 4 is a flowchart of a spatial distance measuring method based on a HoloLens device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The application discloses a spatial distance measuring method based on HoloLens equipment, which comprises the following steps:
generating a spatial map (spatial map) of an environment to be measured by using the physical space mapping of the HoloLens; selecting a plurality of points to be measured in space through gesture control; mapping the spatial positions of a plurality of points to be measured into a spatial map (spatial map), and further mapping the spatial positions into a spatial coordinate system in which the spatial map (spatial map) is located; and calculating the distance between each point in the space coordinate system, and further obtaining the actual distance in the real space.
The application also discloses a spatial distance measurement system based on the HoloLens device, including:
the system comprises a to-be-measured environment generating module, a spatial map generating module and a mapping module, wherein the to-be-measured environment generating module is used for generating a spatial map (spatial map) of an environment to be measured by using the physical space mapping of the HoloLens;
the space map mapping module is used for selecting a plurality of points to be measured in a space through gesture control, and mapping the space positions of the plurality of points to be measured into a space map (spatial map), and further mapping the space positions into a space coordinate system of the space map (spatial map);
and the space distance calculation module is used for calculating the distance between each point in the space coordinate system so as to obtain the actual distance in the real space.
In the embodiment of the present application, the employed HoloLens device is the HoloLens generation 2, but the spatial distance measuring method, the spatial distance measuring system and the developed engineering tool are also applicable to the HoloLens generation 1, so that the method for performing the measurement of the present application on the HoloLens generation product or installing the system of the present application on the HoloLens generation product belongs to the protection scope of the present application.
In one embodiment of the application, in the using process, firstly, the HoloLens is started, the corresponding engineering of deployment is started, if the integrated version is adopted, the corresponding tool is found in the corresponding engineering and is started, and the spatial distance measurement mode is selected according to the requirement. And performing simple look-around on the peripheral area to be measured, so that HoloLens can complete instant positioning and mapping (SLAM) of the area. The specific algorithm can refer to SLAM algorithm of HoloLens. As a result, a spatial map (spatial map) of the environment to be measured is generated in the engineering space. And then the engineering tool is a spatial map (spatial map) attached surface collision body (mesh collision), and the surface collision body (mesh collision) is supported by a physical engine in the unity engine and is used for supporting interactive operation in a physical mode. Thus, the spatial distance measurement operation can be performed.
And creating an instance for the first point in one coherent line segment by adopting a gesture dragging mode. After the label instance is separated, a physical collision is detected forward by a hand, if the physical collision is generated with the surface collision body (mesh collision), the label instance is temporarily moved to a collision position and moves along with the movement of the dragging hand until the dragging hand is released, and the label instance is fixed at the corresponding position, which is the spatial position of the first measuring point. Then, measurement points can be added by the action of clicking with the index finger, which constitutes a continuous polyline. For the label examples, except the first label example, adding a floating label below the label examples, and when the sight line or the gesture ray is aligned with the label examples, the floating label appears to display the distance between the measuring points in the current segment; the floating label is hidden when a line of sight or gesture ray leaves the label instance. For the tag example, when the last tag is not the first tag, a fixed tag is displayed above it, noting the accumulated length between all current lines. For the fixed label, a function key is added beside the fixed label, and a measurement display whole formed by the label example of the measurement point and the connecting line can be deleted or reserved in the space. Meanwhile, a new label instance can be dragged to end the previous measurement chain and start a new one, and the process is the same as the above.
For the calculation of the space distance, all the label examples will obtain a coordinate in the engineering space, and the coordinate system is a rectangular coordinate system in the three-dimensional space, so the distance is a model of a space three-dimensional vector formed by two points.
By clicking on the generated tag instance, the measurement line segment and tag instance containing the point and the following, floating tag can be deleted, and the fixed tag will move to the upper part of the previous tag instance and update the value. The selection of the measuring points can be corrected in this way.
Example 1:
referring to the above steps, the actual ranging steps in the following figures are described as shown in fig. 1-3. In this example, the spatial ranging function is integrated in the form of a functional module in the HoloLens application program that is developed. Therefore, during the use process, the HoloLens device is worn firstly, the program is entered, and the corresponding functional module is started, and the detailed description of the process is omitted. After the space distance measuring function module is started, a space measuring mode is selected, the ray of the hand is aligned to the distance measuring device, the forefinger and the thumb perform pinching and taking actions, the first label example is dragged out, the first label example is released after the first label example moves to the target position, the position of the label example is fixed at the current space position, and the first measuring point is successfully generated, as shown in fig. 1. The first measurement point in this example selects the end of a 60cm T-scale mark, then aligns the hand ray to the start of the T-scale mark, and then clicks the index finger at intervals to create a second example label at the current location. At this point, the fixed label appears and is positioned over the second label instance, showing a current total length of 0.60m, consistent with the actual measurement. Clicking a square root button at the fixed label to finish the spatial distance measurement of the segment, namely the length of a single spatial line segment, as shown in fig. 2. If the "x" button is clicked, the measurement chain is deleted. For the continuous ranging of multiple sections of spaces, the operation mode of the measurement of the first section is similar to that of the single-section measurement, and the difference is that after the measurement result of the first section is generated, the 'check mark' or 'x' button at the position of the fixed label cannot be clicked to finish the measurement through 'finishing' or 'deleting', but the hand is continuously moved, the ray of the hand is aligned to the point to be measured and clicked at intervals to generate a new continuous label example, and then the continuous space measurement of multiple sections is realized. In this example, as shown in fig. 3, the first example tag is dragged out to the lower left corner of the target, and then the upper left corner, the upper right corner, and the lower right corner are clicked in succession, so that continuous 3-segment spatial distance measurement is realized. At this time, the fixed tag moves to the top of the last example tag as the example tags are generated, and the value of the fixed tag is displayed as the sum of the current 3 space distances, namely 1.06 m. Moving the hand ray to the lower right hand corner example tab position at the same time, the floating tab appears below it, showing the spatial distance of the current segment, i.e., the upper right to lower right segment, with a value of 0.37 m. At this time, the multi-segment spatial distance measurement is not finished, and the measurement points can be increased by the interval point clicking. If the position of the measuring point is not ideal, the example label can be clicked to delete.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A spatial distance measuring method based on HoloLens equipment is characterized by comprising the following steps:
generating a spatial map (spatial map) of an environment to be measured by using the physical space mapping of the HoloLens; selecting a plurality of points to be measured in space through gesture control; mapping the spatial positions of a plurality of points to be measured into a spatial map (spatial map), and further mapping the spatial positions into a spatial coordinate system in which the spatial map (spatial map) is located; and calculating the distance between each point in the space coordinate system, and further obtaining the actual distance in the real space.
2. The method as claimed in claim 1, wherein the tool developed by unity engine is deployed on the HoloLens device in unity uwp mode, and the spatial map (spatial map) is placed under the world coordinates of unity engine to provide the basis of operation calculation.
3. The method for measuring the spatial distance based on the HoloLens device as claimed in claim 1 or 2, wherein when the plurality of points to be measured are selected, the selection of the measuring points is completed by attaching a surface collision volume (mesh collision) to the spatial map (spatial map) and then using a dragging or clicking gesture to trigger ray collision detection on the surface collision volume (mesh collision).
4. The method as claimed in claim 1 or 2, wherein for each point to be measured, a label instance is generated at the same position in a virtual space, line segment connections are generated between the label instances added in sequence, and the distance is calculated under the coordinate system of the unity engine according to the line segment to reflect the corresponding spatial distance.
5. The method of claim 4, wherein a floating label is added under the label instance except the first one, and when the sight line is aligned with the label instance, the floating label appears to show the distance between the measurement points in the current segment; the floating tag is hidden when the line of sight leaves the tag instance.
6. The method of claim 5, wherein for the tag instance, when the last tag is not the first tag, a fixed tag is displayed above the last tag, and the accumulated length between all current lines is written.
7. The method as claimed in claim 6, wherein a function button is added beside the fixed tag, and the whole measurement display formed by the tag instances of the plurality of points to be measured and the line segment can be deleted or retained in the space.
8. The method for measuring the spatial distance based on the HoloLens device according to claim 1 or 2, wherein the precision of the measured distance can reach centimeter level.
9. A spatial distance measurement system based on a HoloLens device, comprising:
the system comprises a to-be-measured environment generating module, a spatial map generating module and a mapping module, wherein the to-be-measured environment generating module is used for generating a spatial map (spatial map) of an environment to be measured by using the physical space mapping of the HoloLens;
the space map mapping module is used for selecting a plurality of points to be measured in a space through gesture control, and mapping the space positions of the plurality of points to be measured into a space map (spatial map), and further mapping the space positions into a space coordinate system of the space map (spatial map);
and the space distance calculation module is used for calculating the distance between each point in the space coordinate system so as to obtain the actual distance in the real space.
10. A HoloLens electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating via the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the spatial distance measuring method according to any one of claims 1 to 8.
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