CN113291075B

CN113291075B - Wall painting copying method

Info

Publication number: CN113291075B
Application number: CN202110228165.4A
Authority: CN
Inventors: 付常青
Original assignee: Guangzhou Hanyue Data Processing Technology Co ltd
Current assignee: Guangzhou Hanyue Data Processing Technology Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2024-01-09
Anticipated expiration: 2041-03-01
Also published as: CN113291075A

Abstract

The invention discloses a wall painting copying method, which is used for copying ancient or modern wall paintings combined with landforms to be entity replicas capable of being watched at a short distance; the method is characterized in that: the mural copying method comprises the following steps: a step of mural image acquisition; a step of processing the mural data; a step of recovering the base layer of the mural: manufacturing a mural base layer by using clay and an aluminum honeycomb plate; UV printing step. The invention achieves the technical effects that: the color of the restored fresco is high in accuracy; the wall painting ground layer is light; the wall painting ground layer is firm and not easy to damage and fall off.

Description

Wall painting copying method

Technical Field

The invention relates to the field of cultural relic artworks and artistic archaeological museums, in particular to a method for high-precision image acquisition, light output, color management, cultural relic image data processing, wall painting ground layer manufacturing and wall painting printing and copying of ancient wall paintings.

Background

The protection problem of ancient mural is always a major research topic which is puzzled to be solved urgently by the cultural relics department. The existing rich frescoes are more urgent and difficult to protect. The copying method and the new technical means are used for protecting the wall painting, and can be used as an application technology for truly recording the wall painting files, and also can be used as an auxiliary means for protecting and repairing the wall painting.

The establishment of a comprehensive and real mural image file is the basis of all researches and interpretations. Wall paintings are visual artistic images and are also image storage carriers of ancient documents. The past fresco files often use image log to illustrate the method of adding photos and copying. These methods certainly have some reference value, but have drawbacks in at least two ways: firstly, character recording and copying can cause 'recreating' deviation due to different knowledge and knowledge levels and high skill level of participants, and the true state of an object can not be reflected; secondly, the photo is used for reflecting the wall painting, and the dimension and the material of the wall painting are obviously different from those of the original wall painting, so that the psychological distance is easy to generate. The defects can be made up to the maximum extent by introducing the copy of the original, original color, original appearance and raw material into the work of wall painting data collection and wall painting archives, and a solid foundation is laid for future research and utilization of solid materials.

The design of new technical solutions for the copying of wall paintings that are simple and convenient to use and that are cost-effective to implement remains a endeavor of the person skilled in the art.

Disclosure of Invention

One of the objectives of the present invention is to restore the base layer of the mural and to maximize the fidelity of the mural's appearance using UV printing replication techniques.

One of the purposes of the invention is realized by adopting the following technical scheme:

the mural copying method is used for copying ancient or modern murals combined with landforms to form entity replicas which can be watched at short distance;

the method is characterized in that: the mural copying method comprises the following steps:

the mural image acquisition step:

using a track movable mural collecting system, and sequentially photographing from left to right along the photographing direction of the same row; determining sampling resolution, and calculating an actual shooting range according to the actual resolution; the overlapping rate of two adjacent images is 40% -50%; calculating the shooting line number according to the length of the shot image, the actual shooting range and the overlapping rate; the mural collection system comprises a digital camera, lamplight and a guide rail;

shooting a color card before shooting the picture of the wall painting image by the digital camera each time, and shooting a color card again under the condition of changing the light source; saving a digital information file of the color card, namely a digital camera color card file;

shooting a wall painting image photo and storing the photo as an original wall painting image file;

the digital camera color card file and the original mural image file are collectively called mural information acquisition data;

the mural data processing step:

according to the digital camera color card file, utilizing color management equipment and software to manufacture a digital camera color management characteristic file;

synthesizing the digital camera color management characteristic file and the original mural image file into an original mural image file, called mural information processing data, by using the color management device and software;

a step of recovering the base layer of the mural:

manufacturing a mural base layer by using clay and an aluminum honeycomb plate;

UV printing:

the UV printer is debugged, the EFI software is used for controlling the ink quantity of the printer, and the debugging substeps are as follows:

first ink amount control sub-step S401: printing a first ink quantity control test strip, and preliminarily testing the ink quantity range of 200-400;

second ink amount control sub-step S402: according to the printed first ink quantity control test strip, reading the ink quantity by a spectrophotometer, and then narrowing the ink quantity range to perform the second-step ink quantity control, and printing out a second ink quantity control test strip;

third ink amount control sub-step S403: determining the ink quantity range to the proper ink quantity of the mural base layer by reading the ink quantity control of the second step, and printing a third-step ink quantity test strip on the mural base layer to obtain an accurate ink quantity value;

generating a media ink quantity linearization file substep S404: reading a color card of a medium from the third ink quantity control test strip printed by the mural base layer to generate a medium ink quantity linearization file;

generating a mural base layer color ICC profile substep S405: printing a color block file on the wall painting base layer, and generating a wall painting base layer color ICC characteristic file;

according to the color ICC profile of the base layer of the wall painting, the color of the wall painting is restored, and the method comprises the following substeps:

the generate personalized printer driver substep S406: importing the wall painting layer ink quantity linearization file and the wall painting layer color ICC characteristic file into the EFI software to generate a combined data file image, namely a personalized printer driver, for controlling the printer;

printing primary color mural substep S407: and controlling the printer by using the primary color mural image file compensated by the ICC curve and by means of the personalized printer driver, and printing the copy of the mural on the mural ground layer.

According to other embodiments of the invention, it may also comprise one or more of the technical features described herein. The new technical solutions thus constituted are part of the invention as long as such a combination of technical features is practicable.

Compared with the prior art, the invention has the beneficial effects that:

the copying method of the ancient torn wall painting can centralize and display the wall paintings in different places in full breadth and original large size, so that a viewer has the opportunity to carefully watch the wall painting in a short time;

the ancient wall painting is copied and then used for exhibition, so that a viewer does not need to visit ancient buildings, grottoes temple or tomb rooms, and the ancient wall painting plays an important role in protecting cultural relics.

Drawings

The features, advantages, and characteristics of the present invention may be better understood by reference to the following description of the embodiments with reference to the drawings, in which:

fig. 1: the simplified flow steps of the wall painting copying method created by the invention are schematic block diagrams;

fig. 2: the clay layer preparation material schematic diagram of the wall painting replication method is respectively glue, sand and stone and gypsum;

fig. 3: the invention creates a wall painting base layer preparation material schematic diagram of the wall painting replication method, which is respectively a clay and aluminum space honeycomb plate;

fig. 4: the invention provides a clay layer schematic diagram of a wall painting replication method, which is respectively a first coarse clay layer and is prepared by mixing sand stone, clay and glue; the second clay layer is prepared by mixing lime paste, mud and glue; the third lime layer is prepared by mixing lime paste and glue;

fig. 5: the invention provides a method for collecting a schematic diagram by a rail splicing method of a wall painting copying method;

fig. 6: the SG color card schematic diagram used in the mural copying method provided by the invention;

fig. 7: the invention creates a picture content schematic diagram of an original mural image file of a mural copying method, wherein color values RGB of pixel points corresponding to a picture block in a small red frame in the picture are displayed in a list mode;

fig. 8: ICC characteristic curve data schematic diagram of the digital camera color card file of the wall painting copying method of the invention;

fig. 9a: a data image before compensation is performed on color value rgb+icc characteristic curve data of pixel points corresponding to a block in a small red frame in a mural picture in fig. 7;

fig. 9: the invention provides a schematic diagram of picture content of a primary color wall painting image file of a wall painting copying method, and a corresponding real color image of the wall painting;

fig. 10: the invention creates a schematic diagram of UV printing steps of a mural copying method, which finds out that UV printing is performed on a mural base layer;

fig. 11: the UV printing step schematic diagram of the mural copying method provided by the invention shows the information abstract of ink quantity control;

fig. 12: schematic diagram of UV printing equipment used in the mural copying method of the invention;

fig. 13: the UV printing equipment used in the wall painting copying method provided by the invention is schematic, wherein the ancient wall painting is finally copied in the printing process.

The base layer produced simulates the tearing of the mural, and is therefore not perfectly flat.

Detailed Description

The invention will be further described with reference to the drawings and detailed description.

The invention creates the design concept

Fig. 1 shows a schematic block diagram of the steps of a simplified flow of the method for copying a wall painting created by the present invention.

The fresco is attached to the building, and its fate is related to the security risk of ancient building. Once the ancient mural is disappeared, all the historical cultural information which it contains also disappears. The copying technology of the ancient torn wall painting, which is created by the invention, is applied to the field of wall painting protection and restoration, can truly record wall painting information, provides basis for wall painting protection and restoration, and becomes a new means and method. The method records the current situation of the mural and the pathological changes by means of high-precision acquisition, data processing, base layer manufacturing, UV printing technology and the like; and recording the damage distribution of the wall painting, and establishing complete files of ancient wall painting and endangered wall painting diseases according to specific conditions by matching with other means, and analyzing wall painting materials and structures through the images and information records, so that accurate basis and first hand materials are provided for wall painting restoration specialists and artistic and archaeological workers. Provides a feasible scheme for the exhibition of ancient frescoes. Ancient wall paintings are precious and fragile, are scattered in various places of the country, are inconvenient to traffic, and are very difficult to watch in the field. The wall painting is painted on a grotto or ancient architecture wall or applied to an ancient tomb, is generally huge, is attached to a wall body and is not movable, and the environment is influenced by on-site light and the like, so that the wall painting is almost impossible to watch comprehensively and carefully in a short period, and the spreading of the ancient wall painting is greatly limited and has heavy difficulty in propaganda, display and communication. The prior wall painting spreading and displaying means are mostly album prints and copy copies, and the limitation is obvious. The picture album print has great distance from the original wall painting in the aspects of picture size, material texture, tone atmosphere, definition and the like due to the characteristics and the limitations of the picture album print. Most of printed matters are local, cannot reflect the whole appearance of the wall painting, and have no site feel and visual impact of the wall painting; copy copies also have differences in copy quality due to cultural and artistic fostering and skill level of the copy.

The ancient wall painting copying technology of the invention adopts the ancient wall painting high-precision acquisition, data processing, wall painting ground layer manufacturing and UV printing copying technology, thereby not only having the precious property of the traditional technology, but also having scientific authenticity. Not only ensures the restoration of the height of the fresco replica, but also can objectively reflect the real appearance of the fresco. The copying technology of the ancient torn wall painting can centralize the wall paintings in different places to be displayed in a full-breadth and original large size, so that a viewer has the opportunity to carefully watch the wall painting in a short time. Such a way of presentation allows the viewer to gain valuable insight and harvest, whether from an artistic history perspective, aesthetic appreciation, and academic research. The ancient wall painting is copied and then used for exhibition, and a viewer does not need to visit an ancient building, a grotto temple or a tomb room, thereby playing an important role in protecting cultural relics, so that the digital protection of the ancient wall painting has milestone significance for the safety of the cultural relics, and plays a decisive role in protecting the cultural relics of the ancient wall painting.

Base layer for restoring ancient mural

Ancient mural ground layers mainly appear in ancient cultural relics, ancient tombs, ancient buildings, grottoes temple and the like in China.

The materials of construction of the wall base layer, or wall base layer plate, are shown in fig. 2, which are glue, sand, gypsum, respectively.

FIG. 3 shows a schematic diagram of the material of the mural base layer of the mural replication method of the present invention, which is clay, aluminum space honeycomb panel, respectively.

Manufacture of wall painting ground layer

FIG. 4 shows a schematic view of the clay layers of the wall painting reproduction method of the present invention, which are respectively first coarse clay layers, made of sand, clay, and glue; the second clay layer is prepared by mixing lime paste, mud and glue; the third lime layer is prepared by mixing lime paste and glue.

Advantages of the exhibits

a. Accuracy of restoring the color of wall painting

The accurate reproduction color is not only of great significance for truly reflecting the wall painting itself, but also is helpful for later splicing, and the splicing work is greatly facilitated. In the past, the accurate gray balance of the full picture is not possible by adopting the traditional silver salt film, so the inventor often finds that more or less chromatic aberration exists between two images at the later stage, which causes great difficulty to splicing work, but after the images are acquired through the digital back, the inventor can conveniently reach the preset color reduction index by introducing a special color control technology into the processing of the digital image file at the later stage. Each digital image and the special color description file generated for the image are stored together, so that the color of the wall painting can be accurately restored wherever possible.

b. Wall painting ground layer light weight

The aluminum honeycomb panel has the advantages of light weight, high strength, high rigidity and the like. The center is an aluminum hexagonal honeycomb, the density is small (about 3-7 kg per square meter), the weight of the aluminum hexagonal honeycomb is 1/5 of that of the building block plate with the same thickness and the same plane, 1/6 of glass and 1/7 of aluminum material are waterproof, dampproof and free from harmful gas release, the specific strength per unit mass is high, the specific rigidity is high (the structural rigidity is 1.7 times of that of a rib), the aluminum hexagonal honeycomb is not easy to deform, the defects of deformation, middle collapse and the like of other decorative plates when the single block area is large are completely overcome, the processing and application are convenient, the edge folding can be cut at will, the fluorocarbon coating on the surface can ensure that the service life of the product is more than 30 years, the surface of the aluminum honeycomb plate has extremely high flatness and good shock resistance

c. Firm and not easy to damage and fall off

The mural ground layer is made of natural materials, the lining board is made of aviation aluminum materials, and the aviation aluminum materials have a history of more than one hundred years and complete process flow, so that the mural ground layer and the aviation aluminum materials are organically combined together to form the mud board, and the mud board is firm and not easy to damage and fall off.

The wall painting of the tomb room adopts soil nearby the tomb room to manufacture a base layer.

The ancient building mural adopts the soil nearby the ancient building to make a base layer.

The wall painting of the stone cave temple is to use the soil near the stone cave temple to make the ground layer.

The inventors found that the soil in the areas of Gansu, tibet, shaanxi, shanxi, hebei, etc. is different in viscosity, texture and density. Therefore, it is very important to take the soil on site to make a base layer.

Data acquisition and processing

Fig. 5 shows a track splicing method acquisition schematic of the mural replication method created by the present invention.

a. Measures taken to obtain the dpi of the original mural

Digital back of Leaf Aptus 8000 ten thousand pixels using Cambo WDS back-shifting tablet professional camera

The acquisition file format uses RAW, the color gamut is Adobe RGB, the Schneider high definition large image field digital lens, and the German Kangsu spotlight is used for illumination; shooting sequentially from left to right in the shooting direction of the same row, determining sampling resolution, and calculating an actual shooting range according to the actual resolution; the overlapping of two adjacent images is 40% -50%, the number of shooting lines is calculated according to the length of the shot images, the actual shooting range and the overlapping rate, and shooting data are recorded in detail.

Distance of shooting

Under the condition of determining the specified sampling resolution, the inventor calculates the distance between the camera and the shot plane cultural relics according to the factors such as the effective pixels of the digital back, the effective area of the CCD, the lens and the like, when the 8000 ten thousand-pixel CCD is used, the shooting distance is about 2 meters away, and the acquired data has the accuracy of 400dpi.

Track splicing method shooting

Under the specified sampling resolution, the shooting object cannot be shot by one image due to the overlarge area, the shooting object is acquired by adopting a multi-image-field mode, the camera is parallel to the shot cultural relics, a plurality of images are shot, and the combined area is the whole picture of the wall painting in the tomb or the ancient building.

Degree of overlap

The overlapping ratio of two adjacent images reaches more than 40%, so that the situation of dislocation and insufficient drawing can not occur during splicing.

Image cropping

According to the characteristics of the lens and the digital back CCD, the shot single image only uses the image with higher middle quality to cut the part around the image so as to acquire the high level of the whole picture.

Large foot rest

The inventors used a large professional tripod approximately 3 meters high to mount a Cambo WDS back-shifting technology camera for capturing separate images.

b. Principle of protection

The non-contact type collection equipment is used, the collection process is not in physical contact with the cultural relics, the damage to the cultural relics is avoided, a continuous light source is not used, and the used German flash lamp has accurate color temperature and does not contain ultraviolet rays; the light is loaded with the UV-proof filter before, so that ultraviolet rays are effectively filtered, and the light source cannot damage cultural relics.

c. Color reproduction (color management)

The real painting art and the real color of the restored wall painting are the purposes of work. If color restoration is controlled, labor is saved in post-splicing work, so that a photographed image needs to be manufactured into a proprietary color Profile (ICC Profile). Before formal shooting, a color card is shot, and when the light source is changed, a color card needs to be shot again, and the color card file and the shot image file are stored together. After the color chart is shot, formal shooting work can be performed.

The SG color card must be collected before the mural is picked up. Fig. 6 shows a schematic diagram of SG color card used in the method of copying wall painting of the present invention.

A color management Profile (ICC Profile) of the camera is formulated using an X-rite professional color management device and software.

After the original mural painting is scanned in high definition and the high definition image data is processed, the inventor obtains a high-precision mural painting Tiff image file, and then the work of ink quantity test and ICC color control of a mural painting ground layer is carried out by using software, and the main steps are as follows:

1. and generating an ICC curve file from the color card file acquired by the inventor on site so as to control the real color range of the output.

And (3) shooting 140 colors of the standard color card by using the same digital camera, and comparing the difference between the true color value and the standard color value of the color card photo to generate a color ICC curve.

2. Color values RGB of pixel points corresponding to the blocks in the small red frames in the mural pictures are shown in the following table.

Fig. 7 is a schematic diagram showing the picture content of an original mural image file of the mural copying method of the present invention, wherein color values RGB of pixels corresponding to a block in a small red frame in the picture are listed below, and the RGB values are:

R	G	B
			95	46	44

fig. 8 shows a schematic diagram of ICC profile data of a digital camera color card file of the mural replication method created by the present invention.

As shown in fig. 9a, the data after compensation is performed on the color value rgb+icc characteristic curve data of the pixel point corresponding to the block in the small red frame in the mural picture, where the RGB values are as follows:

R	G	B
			114	56	54

UV printing

UV printing is performed on the mural base layer.

Fig. 10 shows a schematic diagram of the UV printing step of the mural replication method of the present invention, which finds UV printing on the mural ground layer.

After the high-definition acquisition of the original mural work and the processing of high-definition image data are completed, the inventor obtains a high-precision mural Tiff image file, and then the work of ink quantity test and ICC color control of a mural ground layer is carried out by using software, wherein the main steps are as follows:

a. ink quantity control

And debugging the UV printer, and controlling the ink quantity of the printer by using EFI software.

(1) The ink quantity control test card is printed, and the ink quantity range is preliminarily tested (200-400).

(2) According to the printed ink quantity control bar, ink quantity reading is performed (by a spectrophotometer), and then the ink quantity range is narrowed to perform the ink quantity control of the second step.

(3) And (3) determining the proper ink quantity ranging from the second step to the mural base layer by reading the ink quantity control of the second step, and printing a third-step ink quantity test strip on the mural base layer to obtain an accurate ink quantity value.

Fig. 11: the UV printing step schematic of the mural replication method created by the present invention shows an information summary of ink quantity control.

(4) And reading the color card of the medium from the test strip printed on the mural base layer to generate the ink quantity linearization file of the medium.

(5) The color block file is printed on the wall painting base layer to obtain the color ICC characteristic file of the wall painting base layer.

b. Manufacturing icc color characteristic file and accurately restoring color of wall painting

The ink quantity linearization file of the mural base layer and the color ICC characteristic file of the mural base layer are imported into EFI software to generate a combined data file image, which corresponds to a personalized printer driver and controls the printer.

And controlling the printer by using the ancient high-definition mural file pictures compensated by the ICC curve and by means of the personalized printer driver, and printing a copy close to a real mural on the manufactured mud board.

c. Precision of printing

1. And importing the data file into EFI software for UV printing and outputting with the accuracy of 180dpi.

2. Finally, the ink quantity control and the color management are carried out through EFI, and the obtained mural ICC color characteristic file and the mural base layer ink quantity value can be reproduced into ancient torn-off mural which is basically consistent with the original mural color and medium.

3. From the printing perspective, any material with a flat surface can be printed.

Because the UV ink is cured instantly in millisecond level, the UV ink can be cured and dried without special coating to form a picture. If the ink adhesion is not very strong, the adhesion to the ink is different because of the different surface energies of the different materials. The current solution in the industry is to apply a special coating treatment liquid on the surface of the material before printing so as to increase the surface energy of the material and improve the adhesive force (firmness) of the ink.

FIG. 12 is a schematic view of a UV printing apparatus used in the mural replication method of the present invention;

fig. 13 is a schematic diagram of a UV printing apparatus for use in the method of the present invention for producing a wall painting copy wherein UV printing is in progress to eventually reproduce an ancient pull-off wall painting.

The technical proposal of the invention

According to the specific embodiment of the invention, the mural copying method is used for copying ancient or modern murals combined with landforms to form entity replicas capable of being watched at a short distance;

the method for copying the mural is different from the prior art in that the method for copying the mural comprises the following steps:

the mural image acquisition step:

the mural data processing step:

a step of recovering the base layer of the mural:

manufacturing a mural base layer by using clay and an aluminum honeycomb plate;

UV printing:

Preferably, the UV printing step further includes a printing accuracy adjustment sub-step of:

when the personalized printer driver is imported into the EFI software for UV printing and outputting, the printing precision is 180dpi;

and controlling the ink quantity and managing the color through the EFI software to obtain the ICC color characteristic file of the wall painting and the ink quantity value of the base layer of the wall painting, and copying the wall painting replica consistent with the color and the medium of the original wall painting.

Preferably, the method for copying the mural further comprises the following steps: before the wall painting replica is printed out, the surface of the wall painting base layer is coated with an ink adhesion enhancing coating treatment liquid for increasing the surface energy of the material.

Preferably, the mural collection system further comprises a photometer, and the digital camera comprises a lens and a digital back.

Preferably, the aluminum honeycomb plate is an aluminum aerospace honeycomb plate, and the middle layer is an aluminum hexagonal honeycomb.

Preferably, the wall painting is a tomb wall painting, and soil for manufacturing a base layer of the wall painting is manufactured by soil nearby the tomb; or,

the wall painting is an ancient building wall painting, and soil for manufacturing a base layer of the wall painting is manufactured by adopting soil nearby an ancient building; or,

the mural is a stone cave temple, and soil for manufacturing the mural ground layer is manufactured by soil nearby the stone cave temple.

Preferably, the clay of the mural ground layer is divided into three layers: the first coarse soil layer is prepared by mixing sand, mud and glue; the second clay layer is prepared by mixing lime paste, mud and glue; the third lime layer is prepared by mixing lime paste and glue.

Preferably, in the step of acquiring the mural image, the RAW mural image file format uses RAW, and the color gamut is Adobe RGB.

Preferably, in the step of acquiring the mural image, in the case of using 8000 ten thousand pixels of CCD, the accuracy of the acquired mural information acquisition data acquired is 400dpi at a shooting distance of 2 meters.

Preferably, in the step of collecting the mural images, the lamplight does not contain ultraviolet rays; and a UV-proof filter is loaded in front of the lamp light to filter out the irradiation of ultraviolet rays.

Preferably, in the mural data processing step: and shooting the standard color card 140 color by using the digital camera, and comparing the difference between the real color value and the standard color value of the color card photo to generate a color ICC curve.

The technical scheme has the beneficial technical effects that:

the color of the restored fresco is high in accuracy;

the wall painting ground layer is light;

the wall painting ground layer is firm and not easy to damage and fall off.

The foregoing has described in detail preferred or specific embodiments of the invention. It should be understood that numerous modifications and variations will be apparent to those skilled in the art in light of the inventive concepts herein without requiring undue effort. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the design concept created by the present invention by the person skilled in the art shall be within the scope of the present invention and/or the protection scope defined by the claims.

Claims

1. A mural copying method for copying ancient or modern mural combined with landform to be an entity replica that can be viewed at a close distance;

the mural image acquisition step:

the mural data processing step:

a step of recovering the base layer of the mural:

manufacturing a mural base layer by using clay and an aluminum honeycomb plate;

UV printing:

2. A method of wall painting replication according to claim 1, and characterized in that: the UV printing step further comprises a printing precision adjustment sub-step:

3. A method of wall painting replication according to claim 2, and characterized in that: the method also comprises the following steps: before the wall painting replica is printed out, the surface of the wall painting base layer is coated with an ink adhesion enhancing coating treatment liquid for increasing the surface energy of the material.

4. A method of wall painting replication according to claim 1, and characterized in that: the mural collection system further comprises a photometer, and the digital camera comprises a lens and a digital back.

5. A method of wall painting replication according to claim 1, and characterized in that: the aluminum honeycomb plate is an aluminum aerospace honeycomb plate, and the middle layer is an aluminum hexagonal honeycomb.

6. A method of wall painting replication according to claim 1, and characterized in that: the wall painting is a tomb wall painting, and soil for manufacturing a wall painting base layer is manufactured by adopting soil nearby a tomb; or,

7. A method of wall painting replication according to claim 1, and characterized in that: the clay of the mural ground layer is divided into three layers: the first coarse soil layer is prepared by mixing sand, mud and glue; the second clay layer is prepared by mixing lime paste, mud and glue; the third lime layer is prepared by mixing lime paste and glue.

8. A method of wall painting replication according to claim 1, and characterized in that: in the step of acquiring the mural images, the RAW mural image file format uses RAW, and the color gamut is Adobe RGB.

9. A method of wall painting replication according to claim 1, and characterized in that: in the step of acquiring the mural image, under the condition of using 8000 ten thousand pixels of CCD, the precision of acquiring the acquired mural information acquisition data is 400dpi according to the shooting distance of 2 meters.

10. A method of wall painting replication according to claim 1, and characterized in that: in the step of collecting the mural images, the lamplight does not contain ultraviolet rays; and a UV-proof filter is loaded in front of the lamp light to filter out the irradiation of ultraviolet rays.

11. A method of wall painting replication according to any one of claims 1 to 10, characterized in that: in the mural data processing step: and shooting the standard color card 140 color by using the digital camera, and comparing the difference between the real color value and the standard color value of the color card photo to generate a color ICC curve.