CN105931177B - Image acquisition processing device and method under specific environment - Google Patents
Image acquisition processing device and method under specific environment Download PDFInfo
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- CN105931177B CN105931177B CN201610232427.3A CN201610232427A CN105931177B CN 105931177 B CN105931177 B CN 105931177B CN 201610232427 A CN201610232427 A CN 201610232427A CN 105931177 B CN105931177 B CN 105931177B
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- 230000008569 process Effects 0.000 abstract description 6
- 238000012986 modification Methods 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/06—Topological mapping of higher dimensional structures onto lower dimensional surfaces
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10028—Range image; Depth image; 3D point clouds
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Abstract
The invention relates to an image acquisition processing device under a specific environment, which comprises an acquisition camera, a first flash lamp, a second flash lamp, a cloud deck, a cross rod, a support, an acquisition terminal and a power supply, wherein the cross rod is fixed on the support; the acquisition terminal comprises a storage module and an image processing module; and the image processing module reads the original collected data from the storage module and processes the original collected data to obtain 3D mural model data and 2D mural image data. The method has the advantages that high-definition mural original acquisition data can be acquired through the high-definition acquisition camera and the flash lamp, and 3D mural model data and 2D mural image data are obtained through processing of the image processing module; no matter whether the wall of the collection environment deforms or not, accurate mural positioning can be achieved.
Description
Technical Field
The invention relates to the field of image acquisition and processing, in particular to an image acquisition and processing device and method under a specific environment.
Background
The cultural history of the murals in China is long, and the murals have great artistic value and scientific value, but many ancient mural cultural relics are damaged due to natural environment, human factors and the like; in order to facilitate the repair work of murals and the propagation and development of mural culture, the collection and storage of mural images become very important; nowadays, electronic technology is rapidly developed, and how to adopt digital photography and image processing technology to acquire, process and store mural images is a very important technical problem.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a device and a method for acquiring and processing high-definition mural images.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first scheme is as follows:
the image acquisition processing device under the specific environment comprises an acquisition camera, a first flash lamp, a second flash lamp, a cloud platform, a cross rod, a support, an acquisition terminal and a power supply, wherein the cross rod is fixed on the support, the cloud platform is fixed on the cross rod, the acquisition camera is fixed on the top surface of the cloud platform, the first flash lamp and the second flash lamp are both fixed on the cross rod, and the cloud platform is positioned between the first flash lamp and the second flash lamp; the acquisition terminal comprises a storage module and an image processing module, and the image processing module, the storage module and the acquisition camera are electrically connected in sequence; the power supply supplies power to the first flash lamp and the second flash lamp;
the acquisition camera sends acquired original acquisition data to a storage module; the image processing module reads original collected data from the storage module, processes the original collected data to obtain 3D mural model data and 2D mural image data, and sends the 3D mural model data and the 2D mural image data to the storage module.
Preferably, the acquisition terminal further comprises a display module electrically connected with the storage module.
Preferably, the support device further comprises a rail, the support is arranged on the rail, and the support can move along the rail.
Preferably, the support is an adjustable telescopic rod.
Preferably, the distance between the first flash lamp and the second flash lamp is 1 meter.
Preferably, the power of the first flash lamp and the power of the second flash lamp are both 600 watt-seconds.
Scheme II:
the image acquisition processing method under the specific environment comprises the following steps:
s1: the method comprises the steps that an acquisition camera acquires images of the murals to obtain original acquisition data meeting preset conditions, wherein the preset conditions comprise that the optical resolution of the original acquisition data is not smaller than a preset resolution value, and the acquisition camera acquires the images of the murals continuously according to a preset sequence;
s2: the acquisition camera sends the original acquisition data to the storage module, and the image processing module reads the original acquisition data from the storage module;
s3: the image processing module obtains 3D point cloud data of the original acquisition data in a space coordinate according to the original acquisition data, and obtains 3D mural model data according to the 3D point cloud data;
s4: the image processing module maps the 3D point cloud data to a two-dimensional plane to generate 2D mural image data;
s5: the image processing module sends the 3D mural model data and the 2D mural image data to the storage module.
Preferably, the preset condition in S1 further includes that the overlapping rate of every two adjacent original collected data is not less than 70%; defining the murals to be divided into a plurality of rows from top to bottom, wherein the preset sequence is that the plurality of rows of murals are collected in sequence from top to bottom, and each row of murals are collected from left to right.
Preferably, the preset resolution value in S1 is 300 dpi.
Preferably, in S1, the distance between the image capture processing device and the mural under the specific environment is adjusted to make the optical resolution of the original captured data meet the preset condition.
Compared with the prior art, the method has the advantages that high-definition original mural acquisition data can be acquired through the high-definition acquisition camera and the flash lamp, and 3D mural model data and 2D mural image data are obtained through processing of the image processing module; no matter whether the wall of the collection environment deforms or not, accurate mural positioning can be achieved.
Drawings
FIG. 1 is a schematic diagram of an image acquisition and processing apparatus according to a specific embodiment of the present invention;
fig. 2 is a flow chart of an image acquisition processing method in a specific environment of the present invention.
In the figure, 10, a capture camera; 20. a first flash lamp; 21. a second flash lamp; 30. a holder; 40. a support; 401. a cross bar.
Detailed Description
The invention will be further described with reference to the accompanying drawings and the detailed description below:
the image acquisition processing device under the specific environment comprises an acquisition camera 10, a first flash lamp 20, a second flash lamp 21, a cloud deck 30, a cross bar 401, a support 40, an acquisition terminal, a track and a power supply; the acquisition terminal comprises an image processing module, a storage module and a display module; the image processing module and the display module are both connected with the storage module.
As shown in fig. 1, the cross bar 401 is horizontally fixed on the bracket 40; the holder 30 is fixed on the cross bar 401, preferably on the middle end of the cross bar 401; the collecting camera 10 is fixed on the top surface of the holder 30; the first flash lamp 20 and the second flash lamp 21 are both fixed on the cross rod 401, and the pan-tilt 30 is located between the first flash lamp 20 and the second flash lamp 21; preferably fixed to both ends of the cross bar 401, respectively; the capturing camera 10, the first flash 20 and the second flash 21 are in the same line and on the same plane as the cross bar 401.
The bracket 40 is a carbon fiber bracket, the bracket 40 is an adjustable telescopic rod, and the bracket 40 can control the holder 30 to vertically move up and down so as to drive the collecting camera 10 to vertically move up and down; the support 40 is erected above the track, and the support 40 can move along the track to drive the holder 30 and the collecting camera 10 to horizontally move left and right.
The power supply supplies power to the first flash lamp 20 and the second flash lamp 21;
the acquisition camera 10 is electrically connected with the acquisition terminal; the acquisition camera 10 is connected with the storage module, the acquisition camera 10 sends acquired original acquisition data to the storage module, the display module reads the original acquisition data from the storage module and displays the original acquisition data, and a user can view the original acquisition data through the display module of the acquisition terminal; the image processing module reads original collected data from the storage module, performs image processing on the original collected data to obtain 3D mural model data and 2D mural image data, and sends the 3D mural model data and the 2D mural image data to the storage module for storage;
the acquisition terminal is a computer, and the computer comprises a 1394 live wire interface; the image processing module is Agisosoft Photoshop Professional.
The acquisition camera 10 comprises a lens, a camera body and a digital back, wherein the lens, the camera body and the digital back are sequentially connected, and the digital back is connected with an acquisition terminal; if the shooting distance is not more than 1 m due to the limitation of the shooting site, the acquisition camera 10 comprises a lens and a camera body, the camera body is connected with an acquisition terminal, and the acquisition resolution is 300 dpi; the adopted image sensor is not less than 4000 ten thousand pixels of a single frame, and has accurate color reduction capability; the lens has multiple layers of coating films and a large image field, can support the shift function of a CCD (charge coupled device), and can explain the high-definition level of 6.0 microns.
The power of the flash lamp is 600 watt-seconds, and the color rendering index is not less than 96%.
The collection environment comprises wall painting tombs, ancient buildings and stone cave temples, and the collection space is 1 cubic meter or more.
When the distance between the acquisition processing device and the acquisition object is adjusted to be 2.16 meters, the acquisition resolution is 300 dpi; when the distance between the acquisition processing device and the acquisition object is adjusted to be 1.6 meters, the acquisition resolution is 400 dpi; the distance between the first flash lamp 20 and the second flash lamp 21 is 1 meter; the higher the acquisition resolution is, the larger the amplification factor of the original acquired data is, so that the finally obtained mural image is higher in definition.
During collection, the horizontal position and the vertical position of the bracket 40 are adjusted according to the position of a collected object; adjusting the acquisition equipment through the level meter to enable the plane where the first flash lamp 20, the second flash lamp 21, the acquisition camera 10 and the cross rod 401 are located to be parallel to the acquisition object;
the light source area output by the first flash lamp 20 on the acquisition object is a first light source area, the light source area output by the second flash lamp 21 on the acquisition object is a second light source area, and the overlapping light source area of the first light source area and the second light source area is 1 square meter; the light output quantities of the four corners and the central point of the overlapped light source area are respectively collected, and the positions of the first flash lamp 20 and the second flash lamp 21 are adjusted, so that the error values of the light output quantities of the four corners and the light output quantity of the central point of the overlapped light source area are not more than 0.1 EV.
After the position of the device is adjusted, wall paintings on one wall of a cave, a coffin chamber or an ancient building are collected; after the collection of one wall is finished, moving the track to a position below the other wall, and then collecting the murals on the other wall; the data overlapping rate between every two adjacent original collected data is not less than 70%; and sending the original acquisition data acquired by the acquisition camera 10 to an acquisition terminal for storage and processing.
As shown in fig. 2, an image acquisition processing method in a specific environment includes:
s1, acquiring images of the mural by an acquisition camera to enable the optical resolution of the originally acquired data to be not less than a preset resolution value; the preset resolution value is 300dpi, and the optical resolution of the originally acquired data is adjusted by adjusting the distance between the acquisition processing device and the mural; when the distance between the acquisition processing device and the acquisition object is 2.16 meters, the optical resolution is 300 dpi; when the distance between the acquisition processing device and the acquisition object is 1.6 meters, the optical resolution is 400 dpi; the acquisition camera 10 acquires original acquisition data of the mural according to a preset rule; defining the mural from top to bottom into a plurality of rows, wherein the preset sequence is as follows: the highest row area of the mural is a first row, the first row of original collected data is collected from left to right, and after the first row collection is finished, the second row of original collected data is collected from left to right; sequentially collecting a plurality of rows of murals from top to bottom, and collecting each row of murals from left to right; the overlapping rate of every two adjacent original acquisition data is not less than 70%, and the overlapping rate is not less than 70%, so that the information relevance between the continuous original acquisition data is high enough, and the restoration degree of the mural image obtained in the subsequent image processing process is high enough; after the collection of one wall is finished, moving the collection processing device to the position below the other wall, and collecting the murals of the other wall;
step S2, the collecting camera 10 sends the original collected data to a storage module of the collecting terminal; the image processing module reads the original collected data from the storage module;
step S3, the image processing module processes the original collected data, and calculates the spatial relationship between the images shot at different positions according to the original collected data to obtain the 3D point cloud data of the original collected data in the spatial coordinates; each space point of the point cloud data has RGB color information, so that a pair of colored 3D mural model data is formed; according to the relevance of the 3D point cloud data among the original collected data of different wall surfaces in the collecting process, 3D mural model data of different wall surfaces can be obtained, and the 3D mural model data of the adjacent wall surfaces are combined to obtain complete 3D mural model data of the collecting environment;
step S4, the image processing module maps the 3D point cloud data to a two-dimensional plane, so that the position of the mural can be accurately positioned, and high-precision 2D mural image data are finally generated; the 2D mural image data are orthoimages without perspective effect, and the method can accurately restore the 2D mural image no matter the wall of the collection environment is a plane, a concave surface or a convex surface;
step S5, the image processing module sends the 2D mural image data and the 3D mural model data to the storage module; the display module can read the 2D mural image data and the 3D mural model data from the storage module to display, and a user can view the 2D mural image data and the 3D mural model data through the display module.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (6)
1. The image acquisition and processing device under the specific environment is characterized in that the specific environment comprises a mural painting, a coffin chamber, an ancient building and a cave temple, the acquisition and processing device comprises an acquisition camera, a first flash lamp, a second flash lamp, a tripod head, a cross rod, a support, an acquisition terminal and a power supply, the cross rod is fixed on the support, the support is erected above a track, the track is parallel to an acquisition object, the support is an adjustable telescopic rod, the tripod head is fixed on the cross rod, the acquisition camera is fixed on the top surface of the tripod head, an image sensor adopted by the acquisition camera has color reduction capability, a lens of the acquisition camera has a multilayer coating and a large image field, the first flash lamp and the second flash lamp are both fixed on the cross rod, the tripod head is positioned between the first flash lamp and the second flash lamp, and the first flash lamp and the second flash lamp form an overlapped light source area, the area of the overlapped light source area is 1 square meter, and the error value of the light output quantity of four corners and the light output quantity of a central point of the overlapped light source area is not more than 0.1EV by adjusting the positions of the first flash lamp and the second flash lamp; the acquisition terminal comprises a storage module and an image processing module, and the image processing module, the storage module and the acquisition camera are electrically connected in sequence; the power supply supplies power to the first flash lamp and the second flash lamp;
the method comprises the steps that an acquisition camera acquires images of the mural to obtain original acquisition data meeting preset conditions, wherein the preset conditions comprise that the optical resolution of the original acquisition data is not smaller than a preset resolution value, the acquisition camera acquires the images of the mural continuously according to a preset sequence, and the acquisition camera sends the acquired original acquisition data to a storage module; the image processing module reads original acquisition data from the storage module, obtains 3D point cloud data of the original acquisition data in a space coordinate according to the original acquisition data, each space point of the 3D point cloud data is provided with RGB color information, obtains 3D mural model data according to the 3D point cloud data, maps the 3D point cloud data to a two-dimensional plane, generates 2D mural image data, and sends the 3D mural model data and the 2D mural image data to the storage module, wherein the preset condition further comprises that the overlapping rate of every two adjacent original acquisition data is not less than 70%; defining the murals to be divided into a plurality of rows from top to bottom, wherein the preset sequence is that the plurality of rows of murals are sequentially collected according to the sequence from top to bottom, each row of murals are collected from left to right, the preset resolution value is 300dpi, and the optical resolution of the originally collected data is adjusted by adjusting the distance between the collection processing device and the murals.
2. The image capturing and processing device under special circumstances of claim 1, wherein the capturing terminal further comprises a display module electrically connected to the storage module.
3. The image capturing and processing apparatus under specific environment according to claim 1, wherein the distance between the first flash and the second flash is 1 meter.
4. The image capturing and processing apparatus under specific environment according to claim 1, wherein the power of the first flash lamp and the power of the second flash lamp are both 600 w/s.
5. An image acquisition processing method under a specific environment, which is applied to the image acquisition processing device under the specific environment of any one of claims 1 to 4, and is characterized by comprising the following steps:
s1: the method comprises the steps that an acquisition camera acquires images of murals to obtain original acquisition data meeting preset conditions, wherein the preset conditions comprise that the optical resolution of the original acquisition data is not less than a preset resolution value, the acquisition camera continuously acquires the images of the murals according to a preset sequence, the preset resolution value is 300dpi, and the preset conditions further comprise that the overlapping rate of every two adjacent original acquisition data is not less than 70%; defining the murals to be divided into a plurality of rows from top to bottom, wherein the preset sequence is that the plurality of rows of murals are sequentially collected according to the sequence from top to bottom, each row of murals are collected from left to right, and the optical resolution of the originally collected data is adjusted by adjusting the distance between the image collection processing device and the murals;
s2: the acquisition camera sends the original acquisition data to the storage module, and the image processing module reads the original acquisition data from the storage module;
s3: the image processing module obtains 3D point cloud data of the original acquisition data in a space coordinate according to the original acquisition data, and obtains 3D mural model data according to the 3D point cloud data;
s4: the image processing module maps the 3D point cloud data to a two-dimensional plane to generate 2D mural image data;
s5: the image processing module sends the 3D mural model data and the 2D mural image data to the storage module.
6. The method for image capturing and processing under specific environment as claimed in claim 5, wherein in S1, the distance between the image capturing and processing device under specific environment and the mural is adjusted to make the optical resolution of the original captured data meet the preset condition.
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| CN107031855B (en) * | 2016-12-23 | 2023-07-07 | 中国电子科技集团公司第三十四研究所 | Installation and adjustment system of laser communication terminal on aircraft and use method |
| CN110543871B (en) * | 2018-09-05 | 2022-01-04 | 天目爱视（北京）科技有限公司 | Point cloud-based 3D comparison measurement method |
| CN110254116B (en) * | 2019-06-26 | 2021-01-05 | 季云博 | Non-residual process for repairing colored wall painting of Longmen Grottoes and drawing color |
| CN116708683B (en) * | 2023-08-01 | 2023-10-10 | 文博安全科技有限公司 | Digital automatic acquisition system and method for wall painting |
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| CN2472253Y (en) * | 2001-03-16 | 2002-01-16 | 浙江大学 | Camera table for ancient pictures on wall of cavern |
| US8675068B2 (en) * | 2008-04-11 | 2014-03-18 | Nearmap Australia Pty Ltd | Systems and methods of capturing large area images in detail including cascaded cameras and/or calibration features |
| CN203591250U (en) * | 2013-04-23 | 2014-05-14 | 中国检验检疫科学研究院 | Skin digital imaging acquisition device |
| CN104320624B (en) * | 2014-11-02 | 2018-01-30 | 中国科学技术大学 | A kind of mural painting image collecting device and method |
| CN105095894A (en) * | 2015-08-06 | 2015-11-25 | 磐纹科技（上海）有限公司 | Noncontact type book scanning equipment |
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