JP3330577B2 - Building material coating simulation system and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building material painting simulation system and a recording medium for obtaining image data for simulating painting a three-dimensional building material.

[0002]

2. Description of the Related Art Conventionally, in developing a product such as an outer wall material (building board) or a roof material, an actual machine (or a sample machine) is used directly on a product board in order to grasp a product image of the product. The actual sample was made by performing actual painting. In addition, with regard to a new surface pattern-shaped building board, a board part model of the actual size was produced, and this was also subjected to the actual painting, thereby producing an actual sample substitute.

[0003]

However, the labor and cost for producing a sample by such a method are large, and in particular, the coating is performed using an actual machine.
Since valuable time allocated for production is used for sample production, the loss due to frequent failures in processing is very large. Also,
In the case of changing the color, the color switching operation has to be performed only for one plate to be used as a sample, which is very troublesome in terms of work such as color adjustment and pipe cleaning.

[0004] In view of the above problems, the present invention provides a coating for building materials capable of forming a hard copy photograph having a highly accurate product image by performing image processing without actually performing painting. It is an object to provide a simulation system and a recording medium.

[0005]

According to the present invention, there is provided a building material painting simulation system comprising a building material two-dimensional surface shape data.
Data dividing means for dividing the two-dimensional surface shape data into a plurality of pieces according to the position in the thickness direction in which the two-dimensional surface shape data is divided, and assigning different colors to the individual two-dimensional surface shape data divided by the data dividing means. Coloring means.

[0006] Further, there is provided a painting tool selecting means for selecting a painting tool to be simulated, and the data dividing means divides the painting tool at a dividing position corresponding to the painting tool selected by the painting tool selecting means. An appropriate coloring simulation can be performed.

Further, by providing a filtering means for applying different filtering to each of the two-dimensional surface shape data divided by the data dividing means, it is possible to produce a texture corresponding to a coating tool. In addition, after the colors are assigned by the coloring means, by providing the finishing coating means for simulating the coating without depending on the position in the thickness direction, it is possible to produce a finishing coating different from the coloring coating.

A finishing coating means for simulating the coating independently of the position in the thickness direction after the filtering by the filtering means;
By providing, it is possible to produce a texture of a finish painting different from the coloring painting. Further, the present invention is a computer-readable recording medium in which a program for causing a computer to function as the building material painting simulation system is recorded.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a construction material (three-dimensional, but plate-like,
The actual painting on the display screen is performed on a virtual 3D image reproduced based on the 2D photographic image data obtained by taking a digital camera, etc. By applying virtual coloring image processing that can reproduce the above, a photographic image expressing a highly accurate product image can be provided.

The basic idea of the present invention is to apply a virtual painting operation to an object to be painted (actual object) converted to an image information transmission medium called a photograph, and to display the result on a photograph again. The actual painting work,
It is trying to reproduce by the visual information change from the photograph before painting to the photograph after painting.

On the way, the virtual painting work performed on the display screen reproduces the painting work on the screen, although temporarily, almost temporarily. However, as a product sample to be used as a judgment material for product development, only a photograph is used. Since the shape and color reproduction at the level are required, it is intended to finally return to the state of the photograph and reproduce the result of the painting operation. That is, the image data obtained from the photograph as the starting point is processed (image processing), and the image data of the processing result is reproduced on the photograph as the arrival point.

[0012] For us, photography is a familiar image information transmission medium that everyone recognizes. Recently, the conversion from analog photography to digital photography has been progressing steadily. With the increase in the number of CCD pixels provided in a digital camera (2.7 million pixels are also commercially available), images with extremely high resolution can be obtained. Therefore, it can be said that digital camera photography has already become an appropriate means of expression as a material for judging the actual thing. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing a system configuration of a building material coating simulation system according to an embodiment of the present invention. Image data from a digital camera or a scanner is input to the image memory 2 via the image input unit 1. The image data input to the image memory 2 is subjected to image processing described in detail below, displayed on the monitor 6 via the image output unit 3, and printed by the printer 4. The image input unit 1, the image memory 2, and the image output unit 3 are controlled by an image processing unit 5. The input and processed image data is stored in the image storage unit 7, and is read and used as needed. A mouse 8 and a keyboard 9 for an image processing operation are connected to the image processing unit 5.

FIG. 2 is a flowchart for explaining an image processing operation according to the embodiment of the present invention. First, it is determined whether or not the system power is on (step S1). If NO, the process waits until the system power is turned on.
Read the constant value and make initial settings (step S2),
In step S3, it is determined whether or not there is an input of the original image data. If NO, the input waits. If YES, the process proceeds to step S4. Acquisition of the original image data is performed by capturing an actual building material such as an outer wall material or a roof material, which is an object to be painted, with a digital camera, or, when there is no actual material, scanning a physical photograph using a scanner.

In step S4, a detailed correction is performed. For example, unnecessary data such as a background image portion is removed from the acquired original image data, and only necessary target image data is extracted (see FIG. 4). In step S5, the obtained two-dimensional target image data is converted into three-dimensional image data, that is, three-dimensional image data is obtained. For example, three-dimensional data is obtained in accordance with the luminance of two-dimensional image data (for details, see “Surface Shape Data Creation System” developed by the present inventors, Japanese Patent No. 2951646).
Reference).

In step S6, the three-dimensional point group data is converted into a polygon. That is, the entire three-dimensional shape is converted into a set of triangular faces using, for example, a triangular planar shape (see FIG. 5; FIG. 5 is not a polygon of FIG. 4). In step S7, shading is performed on the polygonized data. In the shading, a luminance value of a surface is calculated according to a normal vector of each surface forming a solid based on the polygonized data. Further, smooth shading for interpolating the normal vector may be performed. At this point, the three-dimensional shape data is completed, and the shape can be confirmed on the monitor 6. Further, a board model can be created by an NC router using the polygonized data.

In step S8, it is determined whether or not there is a paint tool input. If NO, the process waits for an input. If YES, the process proceeds to step S9. Most of the surface shape of the building board is largely divided into concave and convex parts, and is subjected to a plurality of coloring treatments such as undercoating, intermediate coating, topcoating, and decorative coating (inkjet coating, etc.), so that the concave and convex parts on the surface are processed. Parts are painted separately.

Here, the image processing is performed with attention paid to the convex coating. For example, when a roll coater is used for coating a convex portion, the viscosity of the paint to be used (applicability) and the elasticity (coating property) of the coating roll cause the convex portion, which is a coating area, to have a printing pressure according to the surface shape thereof. With this, the coloring is performed up to a position within several mm from each surface position according to the printing pressure. That is, depending on the surface shape, the peripheral concave portion having the high convex portion is coated to a lower position. Also, when using a spray,
It is colored to the lower position. In the case of a spray, however, the coating liquid is dispersed at a position below the spray, so that the liquid is colored in a spot state. Whether you use a roll coater or a spray,
If a roll coater is used, data such as the viscosity of the paint to be used (applicability) and the elasticity (coating property) of the coating roll are input as a painting tool.

In step S9, the three-dimensional point group data is divided into two at an arbitrary position on the z-axis according to the coating tool and the surface shape input in step S8 (see the side view in FIG. 6 and the partially enlarged perspective view in FIG. 7). ). That is, the area is divided into a region corresponding to the convex portion of the building board surface shape and having a large z-axis value and a region corresponding to the concave portion and having a small z-axis value. The z-axis value of the boundary changes according to the surface shape as described above. FIG. 3 shows a relationship between position information (x, y) on the building board plane and height information (z) riding on the position information.

In step S10, coloring is performed . A coloring process for a convex portion color is performed on a data group corresponding to an area related to the decorative painting which is a convex portion (a black portion in FIG. 8 ),
In addition, a coloring process for a concave portion color is performed on a data group corresponding to an area not related to the decorative painting (see FIG. 9 ).

In this way, a two-color painting image is completed by combining the divided data into the convex portions and the concave portions and subjecting each portion to a separate coloring process (color conversion) (FIG. 1 ).
0 ). In step S11, filtering is performed. For example, using the spray tool in the painting tool software for the convex region, a finish painting for finishing to an image of the inkjet painting is performed (see FIG. 11 ). At this time, since the data group is divided into an area related to the decorative painting and an area not related to the decorative painting, the area not subjected to the decorative painting is not painted.

It is also possible to intentionally change the spray painting area. In this case, the division position for coloring and the division position for filtering are different. Further, after filtering is performed on each of the convex portion and the concave portion, the entire filter can be further filtered. Filtering is a method of giving a change to an image, and includes, for example, image sharpening by noise removal and blurring. In step S12, the created processed image data is stored in the image storage unit 7.

In step S13, the created processed image data is converted into photographic data and printed out to obtain a coated product sample. This is because the color image on the screen is slightly different from the color image on the photograph. Specifically, RGB → CMYK conversion is performed. In this case as well, prepare several color correction filters and select the color correction filter to be used according to the overall product image (dark, bright, glaring, calm, etc.). To perform the conversion.

In step S14, it is determined whether or not to stop the operation of the system.
Returning to step S3, if the operation is stopped with YES, the flow ends. Note that the present invention is not limited to the above embodiment. The present invention may be a computer-readable recording medium in which a program for causing a computer to function as the building material painting simulation system is recorded.

[0025]

As described above, according to the present invention, it is possible to grasp the product image after painting without preparing an actual painting sample. As a result, the product development period can be significantly reduced. Further, according to the present invention, the construction image can be grasped by combining the obtained information with a photograph of a house.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration of a building material coating simulation system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an image processing operation according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating a relationship between position information on a building board plane and height information on the position information.

FIG. 4 is a photograph showing two-dimensional original image data.

FIG. 5 is a photograph showing polygonized image data.

FIG. 6 is a photograph showing a side of image data divided into two parts.

FIG. 7 is a photograph showing a perspective view of image data divided into two.

FIG. 8 is a photograph showing an area related to decorative painting.

FIG. 9 is a photograph showing a simulation of painting of a region not related to the decorative painting.

FIG. 10 is a photograph showing combined data of two-color coating.

FIG. 11 is a photograph showing a simulation after finish painting.

[Explanation of symbols]

 6 Monitor 8 Mouse 9 Keyboard

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 17/50 610

Claims (6)

(57) [Claims] 1. Three- dimensional building material two-dimensional surface shape data
Data dividing means for dividing the two-dimensional surface shape data into a plurality of pieces according to the position in the thickness direction, and coloring means for assigning different colors to the individual two-dimensional surface shape data divided by the data dividing means. , A building material painting simulation system comprising: 2. A paint tool selecting means for selecting a paint tool to be simulated, wherein said data dividing means divides at a dividing position corresponding to the paint tool selected by said paint tool selecting means. Item 7. A building material coating simulation system according to Item 1. 3. The building material painting simulation system according to claim 1, further comprising a filtering unit that applies different filtering to each of the two-dimensional surface shape data divided by the data dividing unit. 4. The coating simulation system according to claim 1, further comprising: a finishing coating unit that simulates coating without being dependent on the position in the thickness direction after the colors are assigned by the coloring unit. 5. The coating simulation system according to claim 3, further comprising: a finishing coating unit that simulates the coating without depending on the position in the thickness direction after the filtering is performed by the filtering unit. 6. A computer-readable recording medium on which a program for causing a computer to function as the building material painting simulation system according to claim 1 is recorded.