WO2022141887A1

WO2022141887A1 - Home decoration plan automatic design method and apparatus, computer device, and storage medium

Info

Publication number: WO2022141887A1
Application number: PCT/CN2021/084730
Authority: WO
Inventors: 宋璐; 黄治; 喻培; 陈静; 唐睿
Original assignee: 杭州群核信息技术有限公司
Priority date: 2020-12-31
Filing date: 2021-03-31
Publication date: 2022-07-07
Also published as: CN112668085A

Abstract

A home decoration plan automatic design method and apparatus, a computer device, and a storage medium, relating to the field of home decoration design. The home decoration plan automatic design method comprises the following steps: obtaining a planar home decoration background diagram (S101); generating three-dimensional structure information of a room type and a room type projection plan according to the planar home decoration background diagram (S102); receiving a material design instruction (S103); and according to configuration attributes of a home decoration material and the three-dimensional structure information of the room type, automatically placing the material in the room type projection plan according to the material design instruction to obtain a home decoration plan automatic design result (S104). The advantages of 3D design and 2D design are combined simultaneously, thereby realizing simple, efficient and exquisite design effects, and bringing an excellent operation experience to a user.

Description

A kind of home improvement plane automatic design method and device, computer equipment and storage medium

technical field

The invention belongs to the cross field of home improvement design and computer-aided design, and also relates to the technical field of graphics and images, in particular to a method and device for automatic home improvement plane design, computer equipment and a storage medium.

Background technique

Soft decoration is an emerging concept in the field of home decoration design, which further subdivides the field of home decoration. The so-called soft decoration refers to the use of accessories that are easy to replace and change positions after the hard decoration is completed, such as wallpaper, fabrics, carpets, furniture, etc. Ornaments, lighting, plants, etc. are the secondary furnishings and arrangements of the interior. In other words, it means that in addition to the fixed and immovable decorations in the interior decoration such as floors, ceilings, walls and doors and windows, other movable and easy-to-replace decorations are the secondary furnishings and layout of the living room. .

With the improvement of people's living standards, the personalized demand for soft decoration design has become more and more obvious. People usually determine their favorite styles and colors through professional soft decoration designers, shopping guides in home stores, or simple matching by themselves, and Specific soft outfit items, and then go to the purchase and placement of soft outfits. There are two mainstream methods for the current situation of home decoration design, one is 3D form, such as 3D Max, Kujiale, 3D home, and flat design home. This method uses the schematic placement of the 3D model of the home improvement material in the visualization tool as the main design process. The effect in the design process cannot be directly used as the delivery result, and it takes a long time to render and wait for the rendering. The other is 2D form, such as Meijian, PS, PPT, etc. This form uses pictures of home improvement materials to make puzzles on a flat canvas. The effect presented in the design process is the final delivery effect, which is intuitive and simple, but requires strong spatial imagination and takes a long time to make perspective relationships between pictures. , size, etc.

SUMMARY OF THE INVENTION

In view of the above, the purpose of the present invention is to provide an automatic design method, device, computer equipment and storage medium for home improvement planes, and combine the advantages of 3D design and 2D design to achieve simple, efficient and exquisite design effects, bringing users the ultimate operating experience.

In a first aspect, an embodiment of the present invention provides an automatic design method for a home improvement plane, including the following steps:

Get the background image of flat home decoration;

Generate the three-dimensional structure information of the unit and the projection plan of the unit according to the background picture of the flat home decoration;

Receive material design instructions;

According to the configuration attributes of the home improvement materials and the three-dimensional structure information of the house type, the materials are automatically placed in the floor plan of the house type projection according to the material design instructions, and the automatic design result of the home decoration plane is obtained; the configuration attributes of the home improvement materials include the material type and the default design position of the material.

In a second aspect, an embodiment of the present invention provides an automatic design device for a home improvement plane, including:

Get the module to get the background image of flat home decoration;

The generation module generates the three-dimensional structure information of the house type and the floor plan projection of the house type according to the background picture of the flat home decoration;

Receiving module, receiving material design instructions;

The design module, according to the configuration attributes of the home decoration materials and the three-dimensional structure information of the house type, automatically places the materials in the floor plan of the house type projection according to the material design instructions, and obtains the automatic design result of the home decoration plane; the configuration attributes of the home decoration materials include the material type and the material default design. Location.

In a third aspect, an embodiment of the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, when the processor executes the computer program The steps of realizing the method for automatic design of home improvement planes described in the first aspect.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is processed and executed, the method for automatically designing a home improvement plane described in the first aspect is realized. step.

Compared with the prior art, the beneficial effects of the present invention at least include:

The method and device, computer equipment, and storage medium for automatic design of home decoration plane provided by the embodiments of the present invention, by generating three-dimensional structure information of the house type and the floor plan of the house type according to the background picture of the plane home decoration, and defining configuration attributes for the materials, according to the configuration attributes of the home decoration materials and The three-dimensional structure information of the house type, the material is automatically placed in the house type projection plan, and the automatic design results of the home decoration plane are obtained, which simplifies the difficulty of home decoration design, lowers the threshold for the use of design software, and uses 3D information to assist the design process, making designers work more efficiently substantial improvement.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is the flow chart of the home improvement plane automatic design method provided by an embodiment of the present invention;

2 is a schematic diagram of imaging room area information provided by an embodiment of the present invention;

FIG. 3 is a projected plan view of a house type showing control points according to an embodiment of the present invention;

4 is a schematic structural diagram of a 3D material bounding box provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of the highlighted display of the adsorption surface and the default adsorption position of the ground material provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of the highlighted display of the adsorption surface and the default adsorption position of the wall material provided by an embodiment of the present invention;

FIG. 7 is a visual effect diagram of a material and its bounding box provided by an embodiment of the present invention showing near large and far small;

8 is a schematic diagram of an automatic design device for home improvement planes provided by an embodiment of the present invention;

9 is a schematic diagram of an automatic design device for a home improvement plane provided by another embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a computer device according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and do not limit the protection scope of the present invention.

In order to improve the efficiency and effect of home improvement design, the embodiments of the present invention provide an automatic home improvement plane design method, device, computer equipment and storage medium, which can be specifically applied to the field of home improvement to automatically generate a 2.5-dimensional (2.5D) floor plan projection The floor plan and the floor plan of the floor plan are automatically placed by default. Each section is described in detail below.

Example 1

Embodiment 1 provides an automatic design method for a home improvement plane. As shown in FIG. 1, the embodiment provides the automatic design method of home improvement plane, which includes the following steps:

S101, acquiring a background image of plane home decoration.

The background picture of flat home decoration is the benchmark for automatic design of the user's home decoration plane. There are many choices for the background picture of flat home decoration, which can be a complete rendering with soft decoration, an empty scene rendering without soft decoration, a real photo or a whiteboard. A whiteboard is a blank background. That is to say, the automatic design method for the home improvement plane provided by the embodiment of the present invention can be designed on any background image.

S102 , generating three-dimensional information of the house type and a floor plan projection of the house type according to the background image of the flat home decoration.

The home improvement plane automatic design method provided by the present invention is a 3D or 2.5D design method. Therefore, the three-dimensional information of the house type is very important auxiliary information in the design process. Before designing, it is necessary to obtain the three-dimensional structure information of the house type. The three-dimensional information is used for home improvement layout design.

When the background image of the flat home decoration is a rendering image, after parsing the rendering image, the camera parameters and light field information are obtained according to the rendering parameters, and the camera matrix is constructed; the 3D model of the rendering image is obtained by calculating the rendering image and the camera matrix, that is, the 3D structure information of the house type is obtained. Constructing a floor plan projection plan according to the three-dimensional structure information of the floor plan, wherein the projection plan view includes at least one of a ground projection plane (referred to as the ground), a wall projection plane (referred to as a wall) and a top projection plane (referred to as the top surface).

Specifically, the parameters in the rendering process are traced back through the rendering image, and the obtained original camera parameters include cameraPosition (camera position), lookat (the direction the camera is looking at), up (the direction the camera head is facing), and fov (the camera's field of view). angle), clippingNear (near plane clipping), aspect (the aspect ratio of the rendered image), and another representation of the camera parameter information includes cameraPosition, the camera coordinate system represented by U, V, W, clippingNear, aspect, these two The camera parameter information described by each representation is equivalent.

In the embodiment, the first representation is taken as an example to illustrate the construction process of the camera matrix: let zNear=clippingNear, zFar=the distance from the farthest corner of the room in the picture to the camera + compensation constant; The camera rotation matrix R, the camera translation matrix T is obtained through cameraPosition, and the projection matrix P of the camera is obtained through fov, aspect, zNear and zFar; in this way, the camera matrix is the world coordinate system (3D coordinate system) to the plane coordinate system (2D coordinate system). The transformation matrix CameraTransform=P*T*R of the coordinate system), and the transformation matrix CameraTransform ^-1 from the plane coordinate system to the world coordinate system.

When the background picture of the flat home decoration is a real photo, the camera parameters are preset, that is, the camera position is used as the origin of the world coordinate system, and the world coordinate system and the camera coordinate system are coincident, and the edge detection is performed on the real photo, and the top of the wall is perpendicular to each other. The assumption is that the three-dimensional structure information of the house type is restored, and then the projected floor plan of the house type is constructed according to the three-dimensional structure information of the house type.

In one embodiment, constructing a floor plan of a house type projection according to the three-dimensional structure information of the house type includes:

Based on the three-dimensional structure information of the house type, all the corner information and all the wall information representing the connection of the wall are obtained; the corner information is represented by coordinates, and the wall information adopts the two corner points connecting the wall. Coordinates, wall thickness, and wall height description.

After building the floor plan according to the corner point information and the wall information, project the floor plan according to the camera parameters to obtain the floor plan of the floor plan. The specific process is: first, connect the corresponding corner points to generate wall lines according to the corner coordinates and wall information, and obtain the floor plan of the house; then, according to the camera position and the near-plane clipping distance of the direction the camera is looking at, obtain the direction the camera is looking at After the plane coordinates of the point, judge and determine that the point the camera is looking at is located in the room area of the floor plan according to the plane coordinates of the point the camera is looking at; finally, filter and determine the effective corners that make up the room area, based on the effective corners , wall thickness, wall height and camera parameters to generate the wall projection plane, the ground projection plane and the top projection plane to form the floor plan of the room area.

In the embodiment, after obtaining the effective corner points of the room area, the apartment frame is formed according to the connection of the effective corner points, and according to the thickness of the wall, lines parallel to the apartment frame are generated inwardly and outwardly along the apartment frame as the inner wall line and the outer wall line. , determine the intersection of the lines in the wall and use the intersection as the target corner, obtain the two-dimensional coordinates (x, y) at the same time, determine the z-coordinate of the target corner according to the camera height and floor height, and obtain the three-dimensional coordinates of the target corner (x, y) y, z), determine the space connection line according to the three-dimensional coordinates of the target corner point, use the camera view cone determined by the camera parameters to truncate the space connection line to generate a new control point, and take the target corner point in the camera view cone as the original. Control point, according to the new control point and the original control point to generate the wall projection plane, the ground projection plane and the top projection plane to form the floor plan of the room area.

In the embodiment, the point in the direction the camera looks at refers to the clipping plane of the direction in which the camera looks, that is, the intersection of the near plane of the imaging viewing cone and the direction in which the camera looks. Since the room area is a closed area, the corner points between the walls in the room area and the corner points of other rooms of the apartment type are eliminated as redundant points, and the remaining corner points are the effective corner points that constitute the room area. As shown in Figure 2, the corners represented by the symbol × without dots are redundant points in the room where the camera is located, and the remaining symbols × with dots next to them are used to form walls and are valid corners. After eliminating the redundant points, use the thickness information of the wall to increase or decrease the thickness of the wall by 1/2 along the direction perpendicular to the wall to obtain the inner wall line and the outer wall line, and take the intersection of the inner wall line as the target corner point, That is, the dots in Figure 2, they are the smallest set of points that describe the polygons formed by the lines in the wall of the room where the camera is located.

In the embodiment, the target corner point (the circle point in Fig. 2 ) of the final projected plan view is actually the intersection point of all the inner wall lines, but because the room is irregular, it is impossible to distinguish the inner wall line and the outer wall line, so it is necessary to Line recognition is performed to determine the intersection of lines within the wall. The specific process includes:

Extend the line inside the wall and the line outside the wall to realize the closure of the intersection connection to generate the intersection, and at the same time remove the outgoing line segment at the intersection, and then find the closed area where the plane coordinates of the point in the direction the camera is looking at. as the target corner.

In the embodiment, the perspective projection and orthogonal projection of the indoor area can be realized by using the camera view cone. When the perspective projection is realized, the camera view cone used is the truncation of the spatial connection of the vertebral frustum to the target corner, and the intersection of the vertebral frustum and the spatial connection. is the new control point; when the orthographic projection is realized, the camera view cone used is the spatial connection truncation of the cube to the target corner.

In the embodiment, the new control point and the original control point are connected in sequence to generate the wall projection plane, then all the upper control points of the wall are connected to form the top projection plane, and all the lower control points of the wall are connected to form the bottom surface. Projection plane, which forms the projected floor plan of the room area.

In the present invention, the projection plane is called the adsorption surface, which means that the home improvement material can be adsorbed to the corresponding surface according to the configuration property of the material. In order to better describe the adsorption surface, the corner points of the plane are set as control points, and the adsorption surface is described according to the control points. In the embodiment, the adsorption surface is represented by the control points connected clockwise, and a List is used to describe the visible projection plane of the house type structure of the rendering image, and each visible projection plane is described by no less than 3 control points. In particular, when a certain projection plane is cut off by the picture (that is, the viewing cone range), the control points should be adjusted accordingly to the picture, and increased as needed. For example, as shown in Figure 3, the first wall A from the left is truncated by a corner of the view cone, then the control points describing the first wall from the left will be changed from 4 to 5. In addition, there are 4 control points in the last whole picture. The corners are also added to the corresponding projection planes as control points to ensure that the entire picture is completely covered by all projection planes, such as the upper left, upper right, and lower right corners in Figure 3, but the projection planes can overlap in the picture, such as the one behind the bump wall. The plane is shown in part B in Figure 3.

When the background image of the flat home decoration is a whiteboard, a series of rendering images need to be predefined as the input of the three-dimensional structure information of the whiteboard, and the projected floor plan of the house type is constructed according to the three-dimensional structure information of the house type; but the tool display level is blank, that is, RGB=(255, 255, 255), or other user-defined value. One of the typical cases is to select the case where the camera is looking straight ahead, and there is only a part of a wall in the field of view. In this case, all the home improvement materials are placed on the same plane in a tiled type, which is compatible with pure 2D design. .

S103, receiving a material design instruction.

Material design instructions refer to various operation instructions for designing home improvement materials on the home projection plane, including material placement, material movement, material scaling, material rotation, material replacement, rendering, and generating proposals. In the present invention, it mainly relates to the material placement instruction.

S104 , according to the configuration attributes of the home improvement materials and the three-dimensional structure information of the house type, the materials are automatically placed in the house type projection plan according to the material design instruction, and the result of the automatic design of the home decoration plane is obtained.

The configuration properties of home improvement materials are set in advance, and the configuration properties are directly used when applying, among which the configuration properties include the material type and the default design position of the material. Two material types are defined according to the setting method, namely placement type and tile type. Among them, placement type refers to materials that can be placed directly, such as sofas, beds, tables, etc., and is further subdivided. Placement types include placement on the ground, hanging on the wall, and hanging on the top surface. The type of paving refers to the materials that can be paved, such as carpets, paintings, curtains, etc., and is further subdivided. The types of paving include paving on the ground and pasting on the wall.

For materials of the tile type, you can apply the same perspective transformation according to the specific adsorption surface set by the material tile, and paste the preview image of the tile type material on the corresponding adsorption surface. For placement type materials, set the materials placed on the ground and the top surface to stand with the front of the material facing the camera, and the materials hung on the wall with their backs against the wall.

According to the dimensions, two types of materials are also defined, namely three-dimensional (3D) materials and two-dimensional (2D) materials, that is, the automatic design method of home decoration plane provided by the present invention supports the mixed design of 3D materials and 2D materials on the plane at the same time, The material elements manipulated in the canvas are all pictures, the background is a large texture as the background layer, and each material element is a small picture, which is carried by a separate layer.

In order to facilitate the adjustment of the 3D material and the 2D material in the design process, a description mark is set for the 3D material and the 2D material.

Sets the adjustment description of the 3D material as the Bounding Box containing the coordinate system. Bounding Box is the physical size of an object described by three values of x, y, and z, and the unit can be millimeters. The embodiment defines that the model coordinate system of the 3D material is a Cartesian coordinate system, so that the horizontal rightward is the positive direction of the x-axis, the horizontal forward is the positive direction of the y-axis, and the vertical upward is the positive direction of the z-axis. The origin of the coordinate system is located in the shape of the material. Heart. Then for each 3D material, its initial state centroid coordinates are (0, 0, 0), and the coordinates of the 8 vertices of the cube described by the Bounding Box are [point 1 (x/2, y/2 ,z/2),point 2(-x/2,y/2,z/2),point 3(-x/2,-y/2,z/2),point 4(x/2,-y /2, z/2), point 5 (x/2, y/2, -z/2), point 6 (-x/2, y/2, -z/2), point 7 (-x/2) ,-y/2,-z/2), point 8(x/2,-y/2,-z/2)], as shown in Figure 4. The material described by the 3D model is completely surrounded by the Bounding Box.

For 2D material, the Bounding Box describing its physical size is missing, but the present invention still uses the coordinate form of the 3D material Bounding Box, and assigns its default height value according to the empirical observation of the 2D material category, that is, the z value in the Bounding Box, Let the y value be 0, and the x value is calculated according to the ratio of the aspect ratio of the 2D image and the z value of the Bounding Box. Assuming that the default height of z is 2000mm, the pixel height of the corresponding material is 400px, and the real pixel width of the material is 600px, then the z value is 3000mm according to the proportional calculation. After obtaining the x, y, z values, set the origin of the Cartesian coordinate system at the centroid of the 2D material, then the coordinates of the four vertices of the Bounding Box are {point 1(-x/2,0,z/ 2), point 2(-x/2,0,-z/2), point 3(x/2,0,-z/2), point 4(x/2,0,z/2)}.

So far, 2D material and 3D material have the same complete description and identification, the difference is that the Bounding Box of 3D material is a cube, while the Bounding Box of 2D material is a plane (a special cube with a thickness of 0).

The default design position of the material includes the default adsorption position and the default adsorption surface of the material. In the embodiment, corresponding default adsorption surfaces and default adsorption positions are defined for different types of materials according to the material types, so as to realize more efficient and intelligent placement. For a picture without a defined type, the image recognition algorithm can be used to find the material type that best matches the semantic content of the picture, and the default adsorption surface and default adsorption position of the picture can be defined according to the most matching material type.

For the ground materials placed on the ground and laid on the ground, the default adsorption surface is defined as the ground in the floor plan of the floor plan; for the top surface material suspended on the top surface, the default adsorption surface is defined as the top surface in the floor plan of the floor plan. ; For the wall materials hung on the wall and pasted on the wall, define the default adsorption surface as the wall in the floor plan of the floor plan.

After setting the default adsorption surface for each type of material, in order to enhance the corresponding relationship between the display material and the default adsorption surface, it is convenient for users to recognize. When the material is selected and dragged, the control points of the default adsorption surface corresponding to the material are connected to form a closed-loop line, and the virtual surface formed by the closed-loop line or/and the closed-loop line is highlighted. When the material is placed on the adsorption surface, the highlighted display disappears. . In the embodiment, the preview image of the material can be dragged to the floor plan of the floor plan according to the user's instruction, and the control points of the default adsorption surface corresponding to the material will be connected to form a closed-loop line, and the virtual surface formed by the closed-loop line will be displayed. The adsorption surface is highlighted, as shown in Figure 5. When the material is being dragged, the highlight of the adsorption surface will be displayed until the material is placed. The initial state after the material is placed is the selected state, and the highlight of the adsorption surface disappears.

For the ground material placed on the ground, the present invention also defines a method for the default adsorption position of the ground material in the default adsorption surface-ground, including: (a1) When the bottom line of the material preview image and the ground formed by the control point intersect, After placing, ensure that the lower edge of the material preview image and the front and lower edge of the material bounding box parallel to the x direction (that is, the line connecting the vertices 5 and 6 in Figure 4) overlap and the center points of the two overlap, so as to determine the default The adsorption position is shown in Figure 5.

(b1) When the upper and lower lines of the material preview image only intersect with the wall formed by the control points, project the lower line of the material preview image to the ground along the z-axis of the world coordinate system to obtain the lower projection line, according to The lower projection line determines two default adsorption positions: Method 1, after placing, ensure that the lower projection line of the material preview image and the front and lower edge of the material bounding box parallel to the x-direction (that is, the line connecting vertices 5 and 6 in Figure 4) Overlap and the center points of the two overlap, as shown in Figure 5; Method 2, after placing, ensure that the lower projection line of the material preview image overlaps with the front and lower line parallel to the x-direction of the material bounding box, and a certain offset is calculated. , when calculating the offset, make sure that the bounding box of the material is completely inside the ground.

(c1) When the upper edge of the material preview image intersects with the top surface formed by the control points, project the upper edge of the material preview image to the ground along the z-axis of the world coordinate system to obtain the upper projection line, and determine 2 according to the upper projection line Default adsorption position: Method 1, after placing, ensure that the upper projection line of the material preview image overlaps with the front and lower side lines of the material bounding box parallel to the x-direction and the center points of the two coincide, as shown in Figure 5; Method 2, place Afterwards, ensure that the upper projection line of the material preview image overlaps with the front and lower side lines of the material bounding box parallel to the x direction, and perform a certain offset calculation. When calculating the offset, ensure that the material bounding box is completely within the ground.

For the ground material laid on the ground, the present invention also defines a method for the default adsorption position of the ground material in the default adsorption surface-ground, including: (a2) When the bottom line of the material preview image intersects with the ground formed by the control points , the material automatically forms a consistent perspective relationship with the ground. After placing, ensure that the bottom line of the material preview image and the bottom surface of the material bounding box (that is, the plane composed of

vertices

5, 6, 7, and 8 in Figure 4) The center line in the x direction overlaps And the center points of the two coincide, so as to determine the default adsorption position, as shown in Figure 5.

(b2) When the upper and lower lines of the material preview image only intersect with the wall formed by the control points, project the lower line of the material preview image to the ground along the z-axis of the world coordinate system to obtain the lower projection line, according to The lower projection line determines two default adsorption positions: Method 1, after placing, ensure that the lower projection line of the material preview image overlaps with the center line of the bottom surface of the material bounding box in the x direction and the center points of the two coincide, as shown in Figure 5; Method 2. After placing, ensure that the lower projection line of the material preview image overlaps with the center line of the bottom surface of the material bounding box in the x direction and perform a certain offset calculation. When calculating the offset, ensure that the material bounding box is completely within the ground.

(c2) When the upper edge of the material preview image intersects with the top surface formed by the control points, project the upper edge of the material preview image to the ground along the z-axis of the world coordinate system to obtain the upper projection line, and determine 2 according to the upper projection line. Default adsorption position: Method 1, after placing, ensure that the upper projection line of the material preview image and the center line of the bottom surface of the material bounding box in the x-direction overlap and the center points of the two coincide, as shown in Figure 5; Method 2, ensure that after placing The upper projection line of the material preview image overlaps with the center line of the bottom surface of the material bounding box in the x direction, and a certain offset calculation is performed. When calculating the offset, ensure that the material bounding box is completely within the ground.

For the top surface material, the present invention also defines a method for the default adsorption position of the top surface material in the default adsorption surface - the top surface. The default adsorption position of the top surface material is similar to the default adsorption position of the ground material, that is, the default adsorption position of the ground material In the method of defining the position, the ground is replaced by the top surface, the top surface is replaced by the bottom surface, the lower side line is replaced by the upper side line, the upper side line is replaced by the lower side line, the lower side projection line is replaced by the upper side projection line, and the upper side projection line is replaced by the lower side projection line. The connection of vertices 5 and 6 in Figure 4 is replaced with the connection of vertices 1 and 2 in Figure 4. Other content is the same as the definition method of the default adsorption position of the ground material. Specifically:

(a3) When the upper edge of the material preview image has an intersection with the top surface, ensure that the upper edge of the material preview image and the front upper edge of the material bounding box parallel to the x-direction overlap and the center points of the two overlap after placement;

(b3) When the bottom and top lines of the material preview image only intersect with the wall, project the top line of the material preview image to the top surface along the z-axis of the world coordinate system to obtain the top projected line, which is determined according to the top projected line There are 2 default adsorption positions: Method 1, after placing, ensure that the upper projection line of the material preview image overlaps with the front upper side line of the material bounding box parallel to the x direction and the center points of the two coincide; method 2, ensure that the material preview image is placed after placement The upper projection line of the material bounding box overlaps with the front upper line parallel to the x direction of the material bounding box and performs a certain offset calculation. When calculating the offset, ensure that the material bounding box is completely within the top surface;

(c3) When the bottom line of the material preview image intersects with the ground, project the bottom line of the material preview image to the top surface along the z-axis of the world coordinate system to obtain the bottom projection line, and determine two default adsorption positions according to the bottom projection line: Method 1: After placing, ensure that the lower projection line of the material preview image overlaps with the front and upper side lines of the material bounding box parallel to the x-direction, and the center points of the two coincide; Method 2, after placing, ensure that the lower projection line of the material preview image and the material The front upper edge of the bounding box that is parallel to the x-direction overlaps and a certain offset is calculated. When calculating the offset, ensure that the material bounding box is completely within the top surface.

For the wall material, the present invention also defines a method for the default adsorption position of the wall material in the default adsorption surface-wall surface, including: (a4) when the upper and lower lines of the material preview image are only connected to the wall formed by the control points When there is an intersection, the material is placed on the wall that intersects with the center of the material preview image, and the material automatically forms a consistent perspective relationship with the wall. According to the perspective relationship, the fitting plane of the bounding box of the material is judged and determined. The fitting plane It is the left side of the bounding box (that is, the plane composed of vertices 2, 3, 7, and 6 in Figure 4), the back plane (that is, the plane composed of

vertices

3, 4, 8, and 7 in Figure 4) or the right side. (that is, the plane composed of

vertices

1, 4, 8, and 5 in Figure 4), the center point of the material preview after placement coincides with the center point of the fitting plane, as shown in Figure 6.

(b4) When the bottom line of the material preview image and the ground formed by the control points have an intersection, the center of the bottom line of the material preview image is projected along the z-axis of the world coordinate system to the boundary line between the wall and the ground to obtain Projection point A, the preview image of the material is placed on the wall where the projection point A is located, and the material automatically forms a consistent perspective relationship with the wall. According to the perspective relationship, the fitting plane of the material bounding box is judged and determined. After the material is placed, the material is surrounded by The center point of the lower edge of the box's fitting plane coincides with the projection point A, as shown in Figure 6;

(c4) When the upper edge of the material preview image and the top surface formed by the control points intersect, the center of the upper edge of the material preview image is projected along the z-axis of the world coordinate system to the boundary line between the wall and the top surface , get the projection point B, and place the material preview image on the wall where the projection point B is located. After the material is placed, the center point of the upper edge of the material bounding box and the projection point B coincide, as shown in Figure 6.

In the present invention, the material can be placed by dragging the material onto the floor plan of the house type projection with the mouse, or by clicking the button, the preview image of the material can be adsorbed on the mouse, and then clicking on the floor plan of the house type projection can place the material. In addition, at the initial moment of dragging or clicking the button, the mouse is positioned at the center of the preview image of the material. During design, the material selected according to the material design instruction will be automatically generated in the default adsorption position of the default adsorption surface according to its configuration properties. After the material preview is placed in the default adsorption position, it will be automatically adjusted to the physical size, and the icon size will be maintained at other times. , to implement the default design.

Since the type projection plan is a projection plane, in order to make the design result map realize the presentation effect of near big and far small in line with the real world observation results. You need to adjust the placement of the material to show the perspective effect of near, large and far. In traditional 2D design, users usually rely on their own spatial imagination to manually scale the size of each material to achieve the effect of near big and far small. This manual adjustment method has low efficiency, poor accuracy and poor effect.

In order to solve the problems of low efficiency, poor accuracy and poor effect of the manual adjustment method, the automatic design method of the home decoration plane of the present invention further includes: automatically adjusting the size of the 3D material to achieve the effect of near large and far small, including: a material-based bounding box and a camera parameters, after the pose (position and attitude) of the material preview image in the house type projection plane is given, the 2D coordinates of the 8 vertices of the material bounding box in the house type projection plane are obtained by calculation, so as to realize the adjustment of the 3D material.

In one embodiment, the process of automatically adjusting the size of the 3D material is: calculating the plane parallel to the floor plan of the floor plan where the centroid of the bounding box is located, and pasting the material preview image at the centroid of the bounding box, then the Display height h=bbox.z+a*bbox.y, in which the coefficient a is determined according to the projection of the normal of the adsorption surface where the material is located in the direction parallel to the floor plan of the floor plan, and bbox.z is the projection of the bounding box to the floor plan of the floor plan. After, the pixel size of the height of the back plane, bbox.y is the pixel size when the upper or lower plane of the bounding box is expanded to be parallel to the back plane, a*bbox.y represents the upper or lower plane of the bounding box projected on the house The pixel size in the plan view; the display width of the material preview is calculated according to the aspect ratio of the material preview to ensure the consistency of the material preview and the bounding box. After determining the display height and width of the material preview, Then, according to the camera parameters, the 2D coordinates of the 8 vertices of the bounding box in the house type projection plane can be determined, and then the adjustment of the 3D material can be realized. As shown in the chandelier in Figure 7, at different positions in the picture, the bounding box will achieve the visual effect of near and far according to the physical size, and the 3D material will become larger and smaller together.

For 2D materials, bbox.y=0, bbox.x is calculated from bbox.z and the aspect ratio of the material preview, so the bounding box and the material preview are also completely matched in the floor plan of the floor plan, as shown in Figure 7 sofa.

In order to realize rapid custom design, the method for automatic design of home decoration plane provided by the embodiment further includes: setting an operation bar for providing quick switching placement positions for materials, the operation bar is displayed and presented according to the selection of the material, and switching placement positions includes including placing On the ground, hanging on the ceiling, hanging on the wall, sticking to the wall and laying on the ground; the user can quickly operate the material by selecting and switching the placement position to achieve custom design.

In order to achieve a realistic effect, multiple materials in the same position will show an occlusion relationship. The method for automatically designing a home decoration plane of the present invention further comprises: automatically generating a layer and an adjustment layer for the material placed on the floor plan of the house type projection, specifically, generating the layer depth according to the depth information of the material bounding box, and adjusting the layer depth according to the depth compensation value. Depth adjustment to adjust the layer position.

In the present invention, all 3D materials are flattened to a plane with a central depth, and then all 3D materials are degraded into 2D material preview images. Based on this, the depth information of the center of the material bounding box can be used to add a depth compensation value Sort the layers, that is, the layer farthest from the camera is on the bottom layer, and the layer closer to the camera is on the upper layer, so that the near material can block the distant material. When moving or adding material, its depth changes in real time, and the layers are adjusted accordingly to automatically achieve a reasonable occlusion relationship.

For the 3D material added to the projected floor plan of the house, the direction of the depth compensation value is the direction the camera is looking at, and the size is bbox.y/2, which is the depth of the back plane of the material's bounding box, so that the ornaments on the table, the pillows on the sofa, The pillows, blankets, etc. on the bed will be on the upper layer, which is consistent with the observation results.

For layer adjustment, as with pure graphic design, define operations such as top, bottom, move up, move down, etc. for layers. It can be seen from the automatic generation process of the layer that the layer definition depends on the depth calculation of the material. The valid value range for the depth of the soft-covered material layer is (-∞, 1], where the visible range of the viewing cone in the room is [-1, 1], 1 means the near (near) plane, and -1 means the far (far) ) plane. However, the depth value can be less than -1 because the material can move outside the bounds of the room.

For layer adjustment, set the adjusted precision value, perform compensation operations on the precision value and the depth of the material to be adjusted to obtain the compensated depth value, and adjust the material position according to the compensated depth value.

In an embodiment, the adjusted precision value eps may be defined as the minimum precision value recognizable by the computer, such as 1e-6. Then, when the selected material is moved up one layer, sort the depth values of all the original materials, find the depth a of the material one layer above the selected material, adjust the depth compensation value, and set the depth value of the material to be adjusted to a+eps. The same is true for moving down a layer. If you set it to the top, find the value b with the largest depth of all the materials, and set the depth value of the material to be adjusted to b+eps. The same is true for the bottom.

The method for automatically designing a home decoration plane provided by the embodiment further includes: rendering a result of the home decoration plane design to obtain a rendering diagram.

The method for automatically designing a home improvement plane provided by the embodiment further includes: generating a proposal based on a home improvement plane design result.

The automatic design method for home decoration plane provided by the embodiment does not limit the background image, and can take photos for renderings, whiteboards or real scenes, and has stronger application compatibility, which is convenient for users to design home decoration. The effect of realistic design.

In the method for automatic design of home decoration plane provided by the embodiment, configuration attributes are defined through materials, and materials are automatically placed in the floor plan of the house type projection according to the configuration attributes of home decoration materials and the three-dimensional structure information of the house type, so as to obtain the result of automatic design of the home decoration plane, which simplifies the process of home decoration design. Difficulty, lower the threshold for the use of design software, and use 3D information to assist the design process, which greatly improves the work efficiency of designers.

The home improvement plane automatic design method provided by the embodiment uses 3D information to assist the design process, so that the work efficiency of designers is greatly improved, and at the same time, it is perfectly compatible with 2D and 3D materials, and solves the problem of high cost of 2D material information and 3D material acquisition.

In the method for automatic design of a home decoration plane provided by the embodiment, the results of the automatic design of a home decoration plane can be docked and rendered to obtain a more realistic light and shadow effect, and at the same time, a proposal can be generated to provide to the user.

Example 2

Embodiment 2 provides a home improvement plane automatic design device. As shown in FIG. 8, the home improvement plane automatic design device 800 provided by the embodiment includes:

Obtaining module 801, obtaining a background image of flat home decoration;

The generating module 802 generates the three-dimensional structure information of the house type and the floor plan projection of the house type according to the background image of the flat home decoration;

A receiving module 803, receiving a material design instruction;

The design module 804, according to the configuration attributes of the home improvement materials and the three-dimensional structure information of the house type, automatically places the materials in the house type projection plan according to the material design instructions, and obtains the results of the automatic design of the home decoration plane; the configuration attributes of the home decoration materials include the material type, the material default Design location.

In one embodiment, as shown in FIG. 9 , the home improvement plane automatic design device 800 further includes:

The rendering module 901 renders the home improvement graphic design result to obtain a rendering;

The proposal generation module 902 generates a proposal based on the home improvement graphic design result.

It should be noted that, when the automatic home improvement plane design device provided in Embodiment 2 performs the automatic design of the home improvement plane, the division of the above-mentioned functional modules should be used as an example to illustrate, and the above-mentioned functions can be allocated according to different functional modules. The internal structure of the terminal or server is divided into different functional modules to complete all or part of the functions described above. In addition, the automatic home improvement plane design device provided in the second embodiment belongs to the same concept as the embodiment of the home improvement plane automatic design method, and the specific implementation process is detailed in the home improvement plane automatic design method embodiment, which will not be repeated here.

Example 3

Embodiment 3 provides a computer device, and provides a computer device, the computer device may be a terminal, and its internal structure diagram may be as shown in FIG. 10 . The computer equipment includes a processor, memory, a network interface, a display screen, and an input device connected by a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium, an internal memory. The nonvolatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the execution of the operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. The computer program, when executed by the processor, implements an image presentation method. The display screen of the computer equipment may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment may be a touch layer covered on the display screen, or a button, a trackball or a touchpad set on the shell of the computer equipment , or an external keyboard, trackpad, or mouse. Those skilled in the art can understand that the structure shown in FIG. 10 is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer equipment to which the solution of the present application is applied. Include more or fewer components than shown in the figures, or combine certain components, or have a different arrangement of components.

In one of the embodiments, a computer device is provided, including a memory, a processor, and a computer program stored in the machine memory and executable on the processor, and the processor implements the method described in claim 1 when the processor executes the computer program. The steps of the home improvement plane automatic design method are to realize the following steps:

Get the background image of flat home decoration;

Receive material design instructions;

According to the configuration properties of the home decoration materials and the three-dimensional structure information of the house type, the materials are automatically placed in the floor plan of the house type projection according to the material design instructions, and the result of the automatic design of the home decoration plane is obtained.

In one embodiment, when the processor executes the computer program, the following steps are further implemented: rendering the graphic design result of the home decoration to generate a rendering and outputting the rendering.

Since the design process, whether it is the floor plan of the house type projection or the material, is all assisted by 3D information, it is very easy to convert it into a 3D model for offline rendering to obtain a more realistic light and shadow effect.

The most basic situation is that after obtaining the 3D model of the house type projection plan and the 3D model of the 3D material, a 3D model of the scene is formed, and the 3D scene model is rendered to obtain a rendering of the home improvement design result.

When the material is a 2D material, because there is no 3D model, the following three methods are used for rendering: the first method is to tolerate a certain degree of inconsistency, and the image search technology is used to search for the most similar model to render; the second method is based on The outline of the 2D material builds a flat model, and the 2D material is pasted on the surface as a texture for rendering; the three methods are to temporarily remove all the 2D material during rendering, and after obtaining the rendered scene graph of the 3D material, calculate its depth map, and use the 2D material according to The depth information is placed where the occluded part is cropped.

In one of the embodiments, when the processor executes the computer program, the following steps are further implemented: generating and outputting a design proposal based on the home improvement graphic design result.

When the user completes the design of each space, it is also necessary to generate a complete proposal to constitute the entire design scheme. In addition to space design, the complete proposal also includes cover, back cover, catalog, style analysis, material analysis, color analysis, etc. These contents belong to the category of pure 2D design, which can be realized by using the pure white background mentioned above. That is, all materials are posted on the same wall facing the same side. Users can also upload pictures as one or more pages of the proposal, and each space is designed as a page, thus forming a complete proposal that can be shared, disseminated and reported.

Example 4

Embodiment 4 also provides a computer-readable storage medium, such as a memory including at least one instruction, the at least one instruction can be executed by a processor in a terminal to complete the steps of the method for automatically designing a home improvement plane in Embodiment 1.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage In the medium, when the computer program is executed, it may include the processes of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database or other medium used in the various embodiments provided in this application may include non-volatile and/or volatile memory. Nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Road (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

The above-mentioned specific embodiments describe in detail the technical solutions and beneficial effects of the present invention. It should be understood that the above-mentioned embodiments are only the most preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, additions and equivalent substitutions made within the scope shall be included within the protection scope of the present invention.

Claims

An automatic design method for home improvement plane, characterized in that it comprises the following steps:

Get the background image of flat home decoration;

Generate the three-dimensional structure information of the unit and the projection plan of the unit according to the background picture of the flat home decoration;

Receive material design instructions;

According to the configuration attributes of the home improvement materials and the three-dimensional structure information of the house type, the materials are automatically placed in the floor plan of the house type projection according to the material design instructions, and the automatic design result of the home decoration plane is obtained; the configuration attributes of the home improvement materials include the material type and the default design position of the material.
The method for automatically designing a home decoration plane according to claim 1, wherein the generating the three-dimensional structure information of the house type and the floor plan projection of the house type according to the background picture of the plane home decoration comprises:

When the background image of the flat home decoration is a rendered image, after parsing the rendered image, the camera parameters and light field information are obtained according to the rendering parameters, and the camera matrix is constructed; the 3D model of the rendered image is obtained by calculating the rendering image and the camera matrix, that is, the 3D structure information of the house type is obtained. ;Construct the floor plan of the house type according to the three-dimensional structure information of the house type;

When the background picture of the flat home decoration is a real photo, the camera parameters are preset, that is, the camera position is used as the origin of the world coordinate system, and the world coordinate system and the camera coordinate system are coincident, and the edge detection is performed on the real photo, and the top of the wall is perpendicular to each other. , restore the 3D structure information of the house type, and then construct the floor plan projection plan of the house type according to the 3D structure information of the house type;

When the background image of the flat home decoration is a whiteboard, a series of pre-defined rendering images are used as the input of the three-dimensional structure information of the whiteboard, and the projected floor plan of the house type is constructed according to the three-dimensional structure information of the house type.
The method for automatically designing a home improvement plane according to claim 2, wherein the constructing the floor plan projection of the house type according to the three-dimensional structure information of the house type comprises:

Based on the 3D structure information of the house type, all the corner point information and all the wall information representing the wall connection are obtained;

After building the floor plan according to the corner point information and the wall information, project the floor plan according to the camera parameters to obtain the floor plan of the floor plan.
The automatic design method for home improvement plane according to claim 3, characterized in that, after constructing the floor plan according to the corner point information and the wall body information, projecting the floor plan according to the camera parameters, and obtaining the floor plan projection of the floor plan comprises:

First, connect the corresponding corner points to generate wall lines according to the corner coordinates and wall information, and obtain the floor plan of the house; then, according to the camera position and the near-plane clipping distance of the direction the camera is looking at, the plane of the point in the direction that the camera is looking at is obtained. After the coordinates, according to the plane coordinates of the point in the direction the camera is looking at, determine and determine that the point in the direction the camera is looking is located in the room area of the floor plan, and remove the irrelevant corners and walls in the room area, and the remaining corners Points and walls are used as the information of the imaging room area; finally, the effective corner points that constitute the room area are screened and determined, and the wall projection plane, ground projection plane and top projection plane are generated based on the effective corner points, wall thickness, wall height and camera parameters , which forms the projected floor plan of the room area.
The automatic design method for home improvement plane according to claim 1, characterized in that, after obtaining the effective corner points of the room area, a house-shaped skeleton is formed according to the connection of the effective corner points, and according to the thickness of the wall, the house-shaped skeleton is generated inward and outward along the house-shaped skeleton. The lines parallel to the skeleton of the house are used as the inner and outer lines of the wall, determine the intersection of the inner lines of the wall and use the intersection as the target corner, obtain the two-dimensional coordinates (x, y) at the same time, and determine the z of the target corner according to the camera height and floor height. Coordinates, get the three-dimensional coordinates (x, y, z) of the target corner, determine the space connection according to the three-dimensional coordinates of the target corner, and use the camera view cone determined by the camera parameters to truncate the space connection to generate a new control point. Taking the target corner in the camera's viewing cone as the original control point, the wall projection plane, the ground projection plane and the top projection plane are generated according to the new control point and the original control point, and the floor plan of the room area is formed.
The automatic design method for home improvement plane according to claim 1, wherein the default design position of the material includes a default adsorption surface and a default adsorption position of the material;

Define the corresponding default adsorption surface and default adsorption position for different types of materials according to the material type. For the ground materials placed on the ground and laid on the ground, the default adsorption surface is defined as the ground in the floor plan of the floor plan; For the top surface material of the top surface, define its default adsorption surface as the top surface in the floor plan of the floor plan; for the wall material hung on the wall and attached to the wall, define its default adsorption surface as the wall in the floor plan of the floor plan. noodle;

For pictures without a defined type, the image recognition algorithm is used to find the material type that best matches the semantic content of the picture, and the default adsorption surface and default adsorption position of the picture are defined according to the most matching material type.
The automatic design method for a home decoration plane according to claim 6, wherein the corner points of the plane are set as control points, and the adsorption surface is described according to the control points. During the process of selecting and dragging the material, the default adsorption surface corresponding to the material The control points are connected to form a closed-loop line, and the virtual surface formed by the closed-loop line or/and the closed-loop line is highlighted. When the material is placed on the adsorption surface, the highlight disappears.
The automatic design method for a home improvement plane according to claim 6, wherein, for the ground material placed on the ground, the method for determining the default adsorption position of the ground material on the ground comprises:

(a1) When the lower edge of the material preview image intersects with the ground, ensure that the lower edge of the material preview image and the front lower edge of the material bounding box parallel to the x-direction overlap and the center points of the two overlap after placement;

(b1) When both the top and bottom lines of the material preview image only intersect with the wall, project the bottom line of the material preview image to the ground along the z-axis of the world coordinate system to obtain the bottom projected line, which is determined according to the bottom projected line There are 2 default adsorption positions: Method 1, after placing, ensure that the lower projection line of the material preview image overlaps with the front and lower side lines of the material bounding box parallel to the x-direction, and the center points of the two coincide; method 2, ensure that the material preview image is placed after placement The lower projection line of the material bounding box overlaps with the front and lower edge of the material bounding box parallel to the x direction, and a certain offset calculation is performed. When calculating the offset, ensure that the material bounding box is completely within the ground;

(c1) When the upper edge of the material preview image intersects with the top surface, project the upper edge of the material preview image to the ground along the z-axis of the world coordinate system to obtain the upper projection line, and determine two default adsorption positions according to the upper projection line : Method 1, after placing, ensure that the upper projection line of the material preview image overlaps with the front and lower side lines of the material bounding box parallel to the x-direction, and the center points of the two coincide; Method 2, after placing, ensure that the upper projection line of the material preview image and The front and bottom edges of the material bounding box parallel to the x-direction overlap and a certain offset calculation is performed. When calculating the offset, ensure that the material bounding box is completely within the ground;

For the ground material laid on the ground, the method for determining the default adsorption position of the ground material on the ground includes:

(a2) When the bottom line of the material preview image intersects with the ground formed by the control points, the material will automatically form a consistent perspective relationship with the ground. After placement, ensure that the bottom line of the material preview image and the center line of the bottom surface of the material bounding box in the x direction Overlap and the center points of the two coincide to determine the default adsorption position;

(b2) When the upper and lower lines of the material preview image only intersect with the wall formed by the control points, project the lower line of the material preview image to the ground along the z-axis of the world coordinate system to obtain the lower projection line, according to The lower projection line determines two default adsorption positions: Method 1, after placing, ensure that the lower projection line of the material preview image overlaps with the center line in the x-direction of the bottom surface of the material bounding box and the center points of the two coincide; Method 2, ensure that the material is placed after placement The lower projection line of the preview image overlaps with the center line of the bottom surface of the material bounding box in the x direction, and a certain offset calculation is performed. When calculating the offset, ensure that the material bounding box is completely within the ground;

(c2) When the upper edge of the material preview image intersects with the top surface formed by the control points, project the upper edge of the material preview image to the ground along the z-axis of the world coordinate system to obtain the upper projection line, and determine 2 according to the upper projection line. Default adsorption positions: Method 1: After placing, ensure that the upper projection line of the material preview image overlaps with the center line of the bottom surface of the material bounding box in the x direction, and the center points of the two coincide; Method 2, after placing, ensure that the upper side projection of the material preview image The line overlaps with the center line of the bottom surface of the material bounding box in the x direction, and a certain offset calculation is performed. When calculating the offset, ensure that the material bounding box is completely within the ground;

For the top surface material, the methods for determining the default snap position of the top surface material in the top surface include:

(a2) When the upper edge of the material preview image intersects with the top surface, ensure that the upper edge of the material preview image and the front upper edge of the material bounding box parallel to the x-direction overlap and the center points of the two overlap after placement;

(b2) When the lower and upper lines of the material preview image only intersect with the wall, project the upper line of the material preview image along the z-axis of the world coordinate system to the top surface to obtain the upper projection line, which is determined according to the upper projection line There are 2 default adsorption positions: Method 1, after placing, ensure that the upper projection line of the material preview image overlaps with the front upper side line of the material bounding box parallel to the x direction and the center points of the two coincide; method 2, ensure that the material preview image is placed after placement The upper projection line of the material bounding box overlaps with the front upper line parallel to the x direction of the material bounding box and performs a certain offset calculation. When calculating the offset, ensure that the material bounding box is completely within the top surface;

(c2) When the bottom line of the material preview image intersects with the ground, project the bottom line of the material preview image to the top surface along the z-axis of the world coordinate system to obtain the bottom projection line, and determine two default adsorption positions according to the bottom projection line: Method 1: After placing, ensure that the lower projection line of the material preview image overlaps with the front and upper side lines of the material bounding box parallel to the x-direction, and the center points of the two coincide; Method 2, after placing, ensure that the lower projection line of the material preview image and the material The front and upper edges of the bounding box parallel to the x-direction overlap and a certain offset calculation is performed. When calculating the offset, ensure that the material bounding box is completely within the top surface;

For the wall material, the methods for determining the default adsorption position of the top material on the wall include:

(a3) When the upper and lower lines of the material preview image only intersect with the wall, the material is placed on the wall that intersects with the center of the material preview image, and the material automatically forms a consistent perspective relationship with the wall. Judging based on the perspective relationship And determine the fitting plane of the material bounding box, the center point of the material preview image after placement coincides with the center point of the fitting plane, and the fitting plane is the left side, back plane or right side of the bounding box;

(b3) When the bottom line of the material preview image intersects with the ground, project the center of the bottom line of the material preview image along the z-axis of the world coordinate system to the boundary line between the wall and the ground to obtain the projection point, the material preview The image is placed on the wall where the projection point is located, and the material automatically forms a consistent perspective relationship with the wall. According to the perspective relationship, the fitting plane of the material bounding box is judged and determined. After the material is placed, the material bounding box fits below the plane. The center point of the edge and the projection point coincide;

(c3) When the upper edge of the material preview image and the top surface intersect, the center of the upper edge of the material preview image is projected along the z-axis of the world coordinate system to the boundary line between the wall and the top surface to obtain the projection point, The material preview image is placed on the wall where the projection point is located, and the material automatically forms a consistent perspective relationship with the wall. According to the perspective relationship, the fitting plane of the material bounding box is judged and determined. After the material is placed, the fitting plane of the material bounding box The center point of the upper edge of the line coincides with the projection point.
The automatic design method for home improvement plane according to claim 1, wherein the automatic adjustment of the size of the 3D material to achieve the effect of near big and far small, including: based on the material's bounding box and camera parameters, in a given material preview image in After the pose in the house type projection plane, the 2D coordinates of the 8 vertices of the material bounding box in the house type projection plane are obtained by calculation, so as to realize the adjustment of the 3D material.
The automatic design method for home improvement plane according to claim 9, wherein the process of automatically adjusting the size of the 3D material is:

Calculate the plane parallel to the floor plan where the centroid of the bounding box is located, and paste the material preview image at the centroid of the bounding box, then the display height of the material preview image is h=bbox.z+a*bbox.y, where, The coefficient a is determined according to the projection of the normal of the adsorption surface where the material is located in the direction parallel to the floor plan of the floor plan. bbox.z is the pixel size of the height of the back plane after the bounding box is projected on the floor plan of the floor plan. The pixel size when the upper or lower plane of the bounding box is expanded to be parallel to the rear plane, a*bbox.y represents the pixel size of the upper or lower plane of the bounding box in the floor plan of the house type projection;

The display width of the material preview image is calculated according to the aspect ratio of the material preview image;

After determining the display height and width of the material preview image, the 2D coordinates of the 8 vertices of the bounding box in the floor plan projection plane are determined according to the camera parameters, thereby realizing the adjustment of the 3D material.
The automatic design method for home improvement plane according to claim 1, further comprising: setting an operation bar for providing quick switching placement positions for materials, the operation bar is displayed and presented according to the selection of the materials, and the switching placement includes: Including placing on the ground, hanging on the ceiling, hanging on the wall, sticking to the wall and laying on the ground; the user can quickly operate the material by selecting and switching the placement position to achieve custom design.
The automatic design method for home improvement plane according to claim 1, further comprising: automatically generating a layer and an adjustment layer for the material placed on the floor plan of the house type projection, specifically generating a layer depth according to the depth information of the material bounding box , adjust the layer depth according to the depth compensation value to adjust the layer position.
The automatic design method for a home improvement plane according to any one of claims 1 to 12, further comprising: rendering the home improvement plane design result to generate a rendering and outputting;

Generate and output design proposals based on home improvement graphic design results.
A home improvement plane automatic design device is characterized in that, comprising:

Get the module to get the background image of flat home decoration;

The generation module generates the three-dimensional structure information of the house type and the floor plan projection of the house type according to the background picture of the flat home decoration;

Receiving module, receiving material design instructions;

The design module, according to the configuration attributes of the home decoration materials and the three-dimensional structure information of the house type, automatically places the materials in the floor plan of the house type projection according to the material design instructions, and obtains the automatic design result of the home decoration plane; the configuration attributes of the home decoration materials include the material type and the material default design. Location.
A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, claims 1 to 13 are implemented Any one of the steps of the automatic design method for home improvement plane.
A computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is processed and executed, it realizes the steps of the automatic home improvement plane design method according to any one of claims 1 to 13.