CN115225876A - Seamless fusion splicing system for multiple laser projectors - Google Patents
Seamless fusion splicing system for multiple laser projectors Download PDFInfo
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- CN115225876A CN115225876A CN202210826112.7A CN202210826112A CN115225876A CN 115225876 A CN115225876 A CN 115225876A CN 202210826112 A CN202210826112 A CN 202210826112A CN 115225876 A CN115225876 A CN 115225876A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a seamless fusion splicing system for multiple laser projectors, which comprises a light spot brightness acquisition module, a light spot brightness acquisition module and a light spot brightness acquisition module, wherein the light spot brightness acquisition module is used for acquiring light spot brightness received by each concave-convex point on a screen in a scanning mode; the brightness matrix summarizing module is used for sequentially arranging the brightness of the light spot received by each concave-convex point according to the position of the corresponding concave-convex point to obtain a brightness matrix; the coincidence position determining module extracts the brightness of the coincidence zone by analyzing the brightness matrix and obtains the position of the coincidence zone; the superposition brightness fusion module calculates the average value of each light spot on a non-superposition belt on the screen, sets a general brightness range according to the average value, and simultaneously adjusts the reflectivity of each concave-convex point on the screen to ensure that the brightness reflected by each concave-convex point is in the general brightness range. According to the invention, the brightness of each light spot received on the scanning screen is adjusted according to the brightness of the light spot, so that a large amount of manual preparation work is saved before display, and the time cost is saved.
Description
Technical Field
The invention relates to the field of image splicing, in particular to a seamless fusion splicing system for multiple laser projectors.
Background
In large activities such as scientific and technological exhibition, propaganda and training, education and guidance and the like, large projection equipment is not required to be used for exhibiting images to be put in. When the show, in order to promote visitor's visual effect, can adopt laser projection's mode mostly, use laser projector to project the content of projection on the screen promptly to reach the effect of show.
At present, for an oversized screen, multiple laser projectors are generally used for projection together during projection, as shown in fig. 1, each laser projector respectively undertakes a part of laser projection tasks in the whole, and therefore, because overlapping portions of adjacent laser projectors have overlapping lasers, the brightness of the projected portion at this position is significantly higher than that of the projected portions of other laser projectors which project separately.
For the above problems, the currently used method is to load a display card in the screen for setting the picture overlapping band through the display card, where the picture overlapping part can be realized through the fusion of the display card, and after the fusion, the picture is accurately adjusted according to a fine mode such as 5X5 or 9X9 by using the point correction inside the projector, so that the continuity of the picture displayed by the screen is accepted by the viewer.
However, although the displayed pictures can be consistent, the method has certain operation difficulty during operation, and a worker who needs to prepare puts the laser projector at the position before the display, obtains the position of the overlapping band when the projector is started, and corrects the position by placing the display card in the screen and adjusting the parameters of the display card and the parameters of each laser projector. Therefore, the preparation process requires a lot of manpower and time, and when the display is needed to be performed again at another place, all the devices need to be adjusted again, so that the preparation in advance still requires a lot of preparation time and manpower, and the cost is extremely high.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a seamless fusion splicing system for multiple laser projectors, which adjusts the brightness of each light spot according to the brightness of the light spot received by a scanning screen, saves a large amount of manual preparation work before display and saves time and cost.
Therefore, the invention provides a seamless fusion splicing system for a plurality of laser projectors, which comprises:
the light spot brightness acquisition module acquires the light spot brightness received by each concave-convex point on the screen in a scanning mode;
the brightness matrix summarizing module is used for sequentially arranging the brightness of the light spot received by each concave-convex point according to the position of the corresponding concave-convex point to obtain a brightness matrix;
the coincidence position determining module is used for extracting the brightness of the coincidence zone by analyzing the brightness matrix and obtaining the position of the coincidence zone;
and the superposition brightness fusion module is used for calculating the average value of each light spot on the screen, which is not on the superposition band, setting a general brightness range according to the average value, and simultaneously adjusting the reflectivity of each concave-convex point on the screen so that the brightness reflected by each concave-convex point is in the general brightness range.
Further, when the reflectivity of each concave-convex point on the screen is adjusted, the reflectivity is changed in a mode of changing the color of each concave-convex point on the screen, and each reflectivity corresponds to one color respectively.
Further, a color changer is used when changing the color of each concave and convex point on the screen, the color changer includes a pigment color mixer, and the color changer includes the following steps when changing the color of each concave and convex point on the screen:
acquiring the corresponding color of the concave-convex point at the position of the color changer;
obtaining a color value according to the corresponding color of the concave-convex points, and modulating the color by using a pigment color mixer according to the color value;
and coating the prepared color pigment on the surface of the corresponding concave-convex point.
Furthermore, when the position of the color converter is obtained, the RFID electronic tag in the concave-convex point is read by an RFID reader arranged in the color converter, and the corresponding position of the memory in the RFID electronic tag in the concave-convex point is obtained.
Further, the pigment is a quick-drying water-washing pigment, and the screen has a heating function.
Further, the luminance matrix summarizing module is completed by using a scanner, and when the coincidence position determining module analyzes the luminance matrix to obtain a coincidence zone, the method includes the following steps:
s1: creating a bounding box such that a size of the bounding box is smaller than a size of the screen;
s2: acquiring brightness values in the bounding box, and calculating the average value of the brightness values in the bounding box as the brightness of the bounding box;
s3: scrolling the bounding box to enable the bounding box to traverse the screen to obtain a brightness matrix of the bounding box;
s4: acquiring the minimum value in the bounding box brightness matrix, and extracting the bounding box position corresponding to the bounding box brightness of which the bounding box brightness is greater than the minimum value;
s5: and outputting the extracted position of the bounding box as the position of the overlapped band, and acquiring the brightness of the overlapped band.
Further, in the step S5, the following steps are included:
taking the extracted bounding box position as a scanning area;
reducing the size of the bounding box, acquiring the brightness value in the bounding box, and calculating the average value of the brightness value in the bounding box as the brightness of the bounding box;
rolling the bounding box to enable the bounding box to traverse the scanning area to obtain the brightness array of the bounding box;
acquiring the minimum value in the bounding box brightness array, extracting the bounding box brightness of which the bounding box brightness is greater than the minimum value and the corresponding bounding box position, and updating the scanning area;
reducing the size of the bounding box, and repeating the steps until the size of the bounding box reaches a set value, wherein the updated scanning area is the overlapping zone;
and outputting the position of the superposed band, and acquiring the brightness of the superposed band.
Further, the screen is a double-sided light-transmitting screen, and a clamping device for clamping the shading cloth is arranged on the side face of the screen.
The seamless fusion splicing system for the plurality of laser projectors, provided by the invention, has the following beneficial effects:
according to the invention, the brightness of each light spot received on the scanning screen is adjusted according to the brightness of the light spot, so that a large amount of manual preparation work is saved before display, and the time cost is saved;
when the brightness of the screen is adjusted, the general brightness range is obtained by counting the brightness of each light spot, each brightness in the screen is adjusted according to the general brightness range, and when the brightness is detected, the whole screen is traversed in a mode of a bounding box, so that the brightness of the screen is quickly detected;
the present invention does not require adjustment of parameters of the laser projector and correction of the position of the laser projector, and is only mounted on the screen of the receiving laser projector.
Drawings
FIG. 1 is a schematic diagram illustrating the technical effects and principles of a plurality of projectors;
FIG. 2 is a schematic block diagram of the overall system connection of the present invention;
FIG. 3 is a schematic block diagram of the process of changing the color of each concave-convex point on the screen according to the present invention;
FIG. 4 is a schematic block diagram of a process for analyzing a luminance matrix to obtain an overlapped band according to the present invention.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
In the present application, the type and structure of components that are not specified are all the prior art known to those skilled in the art, and those skilled in the art can set the components according to the needs of the actual situation, and the embodiments of the present application are not specifically limited.
Specifically, as shown in fig. 2 to 4, an embodiment of the present invention provides a system for seamlessly fusing and splicing multiple laser projectors, including: the device comprises a light spot brightness acquisition module, a brightness matrix summarizing module, a coincidence position determining module and a coincidence brightness fusion module. The following is a detailed functional description of each module, and the above problems are solved by the coordination of each functional module.
In the invention, the screen used for bearing the light of the laser projector is an acrylic screen, namely the screen is formed by acrylic materials with a plurality of concave-convex points on the surface in a point manner. A detailed description of the following functional blocks is made below based on the screen carrying the laser projector.
The light spot brightness acquisition module acquires the light spot brightness received by each concave-convex point on the screen in a scanning mode; the module collects the photoelectric brightness received by each concave-convex point on the screen, namely the brightness of the light on the screen which is irradiated by the light emitted by the laser projector.
The brightness matrix summarizing module is used for sequentially arranging the brightness of the light spot received by each concave-convex point according to the position of the corresponding concave-convex point to obtain a brightness matrix; the module arranges the received brightness according to the positions of the corresponding concave-convex points to obtain a brightness matrix, and the brightness matrix reflects the brightness of each concave-convex point on the whole screen, namely the brightness on the screen.
The coincidence position determining module extracts the brightness of the coincidence zone by analyzing the brightness matrix and obtains the position of the coincidence zone; the module obtains the position of the overlapping band by processing and analyzing the brightness matrix, and can process and analyze the position of the overlapping band in a data numerical analysis mode when the position of the overlapping band is extracted, so as to obtain points with brightness obviously inconsistent with the surrounding brightness, and further extract the position of the overlapping band according to the positions of the points.
And the superposition brightness fusion module is used for calculating the average value of each light spot on the screen, which is not on the superposition band, setting a general brightness range according to the average value, and simultaneously adjusting the reflectivity of each concave-convex point on the screen so that the brightness reflected by each concave-convex point is in the general brightness range. The module enables the brightness reflected by each concave-convex point on the reflected screen to be in a general brightness range by adjusting the reflectivity of each concave-convex point, the general brightness range is obtained by the average value of each light point on the screen, which is not on the overlapping band, namely, the laser projector projects light, and the module has a comfortable viewing effect from the visual effect of people.
In the technical scheme, the system can be based on a product device which is independent of a screen, and the screen is moved on the screen and the characteristics of the screen are collected and processed by combining the four modules, so that the finally processed screen has the effect that the brightness is in a common brightness range after the light range, and a user has a comfortable condition.
Meanwhile, each module can be embedded into the screen, and the screen is processed, so that the finally processed screen has the effect that the brightness is in the common brightness range after the light range, and a user has a comfortable condition.
According to the invention, the reflectivity of the light with larger brightness is reduced by adjusting the reflectivity of the light, the adjustment of the reflection of the light is completed from lower cost, and further the intensity of the reflected light is changed (local change of a screen), so that the integral visual effect is consistent when a user watches the light. Meanwhile, when the device is built, the device does not need to be placed and debugged by professional personnel.
In the invention, when the reflectivity of each concave-convex point on the screen is adjusted, the reflectivity is changed by changing the color of each concave-convex point on the screen, and each reflectivity corresponds to one color respectively. After a lot of time of research and development personnel, the reflectivity of the obtained light is different for different colors, the light color is high for the reflectivity of the light, the dark color is low for the reflectivity of the light, and the adjustment of the visual effect of the screen is completed through the adjustment of the color. Compared with other adjustment methods, the method has the advantages of low cost, simple real-time operation process and easy manual on-site operation.
Preferably, we can use a production facility to which the system of the invention is based, so that the invention uses a colour changer, including a pigment colour mixer, when changing the colour of each relief point on the screen, the following steps when changing the colour of each relief point on the screen:
firstly, acquiring the corresponding color of the concave-convex point at the position of the color converter;
(II) acquiring a color value according to the corresponding color of the concave-convex points, and modulating the color by using a pigment color mixer according to the color value;
and (III) coating the prepared pigment with the color on the surface of the corresponding concave-convex point.
According to the technical scheme, the steps are sequentially carried out according to the logic sequence, and the coloring is carried out on the concave-convex points through the color toning device, so that the smearing of different colors is carried out on the screen according to the intensity of the corresponding received light, and the light intensity is consistent when the user visually sees after reflection. The invention uses product equipment, when in use, the painting is carried out on the screen, the painted area traverses the whole screen, and when not in use, the painting is easy to store due to the split design with the screen.
Preferably, when the position of the color converter is obtained, the RFID electronic tag in the concave-convex point is read by an RFID reader arranged in the color converter, and the position corresponding to the memory in the RFID electronic tag in the concave-convex point is obtained. The position is determined in the mode of RFID, so that a color converter does not need to be internally provided with a high-precision positioner, the cost of the invention can be greatly reduced, and the maintenance cost is also greatly reduced.
Preferably, the pigment is quick-drying washing pigment, can use the water source to wash the washing pigment on the screen after the projection of each time finishes, makes things convenient for use each time, also can not have the limitation to the plane of using, the screen has the heating function, not only can heat the pigment after scribbling, can also heat the screen after the water washing for the drying that the screen can be quick.
In addition, in the present invention, the scanned part can be integrated into a screen, or can be separately displayed on the screen for action, in the present invention, the brightness matrix summarizing module is completed by using a scanner, and when the overlapping position determining module analyzes the brightness matrix to obtain an overlapping band, the method includes the following steps:
s1: creating a bounding box such that a size of the bounding box is smaller than a size of the screen;
s2: acquiring the brightness value in the bounding box, and calculating the mean value of the brightness value in the bounding box as the brightness of the bounding box;
s3: scrolling the bounding box to enable the bounding box to traverse the screen to obtain the bounding box brightness matrix;
s4: acquiring the minimum value in the bounding box brightness matrix, and extracting the position of the bounding box corresponding to the bounding box brightness of which the bounding box brightness is greater than the minimum value;
s5: and outputting the extracted position of the bounding box as the position of the overlapped band, and acquiring the brightness of the overlapped band.
In the technical scheme, the bounding box in the step S1 is used for detecting the brightness in the area where the bounding box is located, the invention traverses the whole screen in the bounding box, so that the uniform brightness (represented by a bounding box brightness matrix) of each area in the whole screen is obtained, the area where the overlapping band is located is gradually screened out through the step S4, and the size of the bounding box is determined in a proper amount according to the size of the screen and the size of concave and convex points on the screen.
Since most users do not know how the bounding box size is selected, in step S5, the following steps are included:
(1) Taking the extracted bounding box position as a scanning area;
(2) Reducing the size of the bounding box, acquiring the brightness value in the bounding box, and calculating the average value of the brightness value in the bounding box as the brightness of the bounding box;
(3) Scrolling the bounding box to enable the bounding box to traverse the scanning area to obtain the brightness array of the bounding box;
(4) Acquiring the minimum value in the bounding box brightness array, extracting the bounding box position corresponding to the bounding box brightness with the bounding box brightness larger than the minimum value, and updating the scanning area;
(5) Reducing the size of the bounding box, and repeating the steps until the size of the bounding box reaches a set value, wherein the updated scanning area is the overlapping zone;
(6) And outputting the position of the superposed band, and acquiring the brightness of the superposed band.
The steps of the technical scheme are sequentially performed according to a logic sequence, when the size of the initially selected bounding box is too large, the obtained range of the overlapped band is unclear and cannot represent the specific range of the overlapped band, so that the size of the bounding box is gradually reduced, the bounding box with each size obtains a range of the overlapped band, and when the bounding box with each size is reduced to a set value, namely the minimum value of the bounding box, the overlapped band is obtained.
Meanwhile, the scanning function of the invention can be independently borne on a product device or set by depending on a screen, and when a single product is used, the integral data is obtained in a three-dimensional model building mode in the product through the data obtained by scanning and the corresponding position. I.e. pixel data or the like that simulates a screen in a three-dimensional model.
In the invention, the screen is a double-sided light-transmitting screen, and a clamp holder for clamping shading cloth is arranged on the side surface of the screen. Therefore, the invention can be carried on an external product, the light emission of the screen can be adjusted by modifying the color of the shading cloth, so that after adjustment, when equipment is recovered and cleaned, only the shading cloth is cleaned, and meanwhile, the screen can be used on two sides, thereby reducing the difficulty of the equipment of the invention in placement and debugging.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (8)
1. The utility model provides a many laser projector seamless fusion splicing system which characterized in that includes:
the light spot brightness acquisition module acquires the light spot brightness received by each concave-convex point on the screen in a scanning mode;
the brightness matrix summarizing module is used for sequentially arranging the brightness of the light spots received by the concave-convex points according to the positions of the corresponding concave-convex points to obtain a brightness matrix;
the coincidence position determining module extracts the brightness of the coincidence zone by analyzing the brightness matrix and obtains the position of the coincidence zone;
and the coincidence brightness fusion module is used for calculating the average value of each light spot on the screen, which is not on the coincidence zone, setting a general brightness range according to the average value, and simultaneously adjusting the reflectivity of each concave-convex point on the screen, so that the brightness reflected by each concave-convex point is in the general brightness range.
2. The system of claim 1, wherein the reflectivity is changed by changing the color of each concave-convex point on the screen when the reflectivity of each concave-convex point on the screen is adjusted, and each reflectivity corresponds to one color.
3. The system of claim 2, wherein a color converter is used to change the color of each concave-convex point on the screen, the color converter comprises a pigment color mixer, and the method comprises the following steps:
acquiring the corresponding color of the concave-convex point at the position of the color converter;
obtaining a color value according to the corresponding color of the concave-convex points, and modulating the color by using a pigment color mixer according to the color value;
and coating the prepared color pigment on the surface of the corresponding concave-convex point.
4. The system of claim 3, wherein when the color converter is located, the RFID reader installed in the color converter reads the RFID tags in the concave-convex points, and the corresponding positions of the RFID tags in the concave-convex points are obtained, and the corresponding positions of the memories in the RFID tags are stored in the concave-convex points.
5. The system of claim 3, wherein the paint is quick-dry water-wash paint and the screen has a heating function.
6. The system of claim 1, wherein the luminance matrix summarizing module is implemented using a scanner, and the coincidence position determining module, when analyzing the luminance matrix to obtain a coincidence zone, comprises the following steps:
s1: creating a bounding box such that a size of the bounding box is smaller than a size of the screen;
s2: acquiring brightness values in the bounding box, and calculating the average value of the brightness values in the bounding box as the brightness of the bounding box;
s3: scrolling the bounding box to enable the bounding box to traverse the screen to obtain the bounding box brightness matrix;
s4: acquiring the minimum value in the bounding box brightness matrix, and extracting the bounding box position corresponding to the bounding box brightness of which the bounding box brightness is greater than the minimum value;
s5: and outputting the extracted position of the bounding box as the position of the overlapped band, and acquiring the brightness of the overlapped band.
7. The system for seamlessly fusing and splicing a plurality of laser projectors according to claim 7, wherein in the step S5, the method comprises the steps of:
taking the extracted bounding box position as a scanning area;
reducing the size of the bounding box, acquiring the brightness value in the bounding box, and calculating the average value of the brightness value in the bounding box as the brightness of the bounding box;
scrolling the bounding box to enable the bounding box to traverse the scanning area to obtain the brightness array of the bounding box;
acquiring the minimum value in the bounding box brightness array, extracting the bounding box position corresponding to the bounding box brightness with the bounding box brightness larger than the minimum value, and updating the scanning area;
reducing the size of the bounding box, and repeating the steps until the size of the bounding box reaches a set value, wherein the updated scanning area is the overlapping zone;
and outputting the position of the superposed band, and acquiring the brightness of the superposed band.
8. The system for seamlessly blending and splicing a plurality of laser projectors according to claim 1, wherein the screen is a double-sided light-transmitting screen, and a holder for holding a light-shielding cloth is arranged on a side surface of the screen.
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