阅读说明：本技术 一种3d图片裁剪方法及终端 (3D picture clipping method and terminal ) 是由 刘德建 曹增欢 方振华 高秀英 郭玉湖 陈宏� 于 2020-05-12 设计创作，主要内容包括：本发明公开了一种3D图片裁剪方法及终端,通过接收图片裁剪指令,生成裁剪形状对象和裁剪框对象；将所述裁剪形状对象覆盖待裁剪的3D图片；对所述裁剪框对象内的裁剪结果进行预览；当接收到确认剪裁指令时,将裁剪框对象内的待裁剪的3D图片的纹理复制到所述裁剪形状对象上,并关闭待裁剪的3D图片的纹理显示；当接收到还原指令时,删除所述裁剪形状对象,并开启待裁剪的3D图片的纹理显示；增加裁剪形状对象覆盖待裁剪的3D图片,确认裁剪时,将待裁剪的3D图像上需裁剪的部分图片纹理复制到所述裁剪形状对象上,实现在裁剪过程中对裁剪结果的预览及完成裁剪后能够对待裁剪的3D图片进行复原。(The invention discloses a 3D picture cutting method and a terminal, wherein a cutting shape object and a cutting frame object are generated by receiving a picture cutting instruction; covering the cutting shape object on a 3D picture to be cut; previewing a clipping result in the clipping frame object; when a cutting confirmation instruction is received, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object, and closing the texture display of the 3D picture to be cut; when a reduction instruction is received, deleting the cut shape object, and starting texture display of the 3D picture to be cut; and adding a cutting shape object to cover the 3D picture to be cut, copying part of picture texture to be cut on the 3D image to be cut to the cutting shape object when the cutting is confirmed, and realizing the previewing of a cutting result in the cutting process and the restoration of the 3D picture to be cut after the cutting is finished.)

1. A3D picture cropping method is characterized by comprising the following steps:

s1, receiving a picture cutting instruction, and generating a cutting shape object and a cutting frame object;

s2, covering the cutting shape object on a 3D picture to be cut;

s3, previewing the cutting result in the cutting box object;

s4, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object when receiving the cutting confirmation instruction, and closing the texture display of the 3D picture to be cut;

and S5, when a reduction instruction is received, deleting the cutting shape object and starting texture display of the 3D picture to be cut.

2. The method for clipping a 3D picture according to claim 1, wherein in the S1, generating the clipping shape object specifically includes:

generating a two-dimensional vector graph with the same size as the 3D picture to be cut;

changing a shader rendering the two-dimensional vector graphics into textures capable of displaying a 3D picture to be clipped;

and adding thickness information to the two-dimensional vector graphics, and generating three-dimensional vector graphics which are the same as the 3D picture to be cut and serve as a cutting shape object.

3. The method for clipping a 3D picture according to claim 1, wherein in S1, generating the clip box object specifically includes:

generating a crop box object on the crop shape object;

setting the initial size of the cropping frame object to cover the 3D picture to be cropped;

setting the crop box object to be draggable and changeable in size;

and limiting the cropping frame object not to exceed the range of the 3D picture to be cropped.

4. The method of claim 1, wherein the S3 specifically is:

replacing a shader rendering the 3D picture to be cropped with a shader with a lower brightness value;

and setting the brightness value of a shader for rendering the 3D picture to be clipped in the clipping frame object to be normal.

5. The method according to claim 2, wherein the copying of the 3D picture texture to be cropped within the crop box object onto the crop shape object in S4 specifically comprises:

replacing a shader which renders the texture of the cropped shape object and can display the 3D picture to be cropped with a shader which can normally display the texture of the cropped shape object;

and copying the texture of the 3D picture to be clipped in the clipping frame object to the clipping shape object replaced by the rendering shader.

6. A 3D picture cropping terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the following steps when executing the computer program:

s1, receiving a picture cutting instruction, and generating a cutting shape object and a cutting frame object;

s2, covering the cutting shape object on a 3D picture to be cut;

s3, previewing the cutting result in the cutting box object;

s4, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object when receiving the cutting confirmation instruction, and closing the texture display of the 3D picture to be cut;

and S5, when a reduction instruction is received, deleting the cutting shape object and starting texture display of the 3D picture to be cut.

7. The 3D picture cropping terminal according to claim 6, wherein in S1, the generating of the cropping shape object is specifically:

generating a two-dimensional vector graph with the same size as the 3D picture to be cut;

changing a shader rendering the two-dimensional vector graphics into textures capable of displaying a 3D picture to be clipped;

and adding thickness information to the two-dimensional vector graphics, and generating three-dimensional vector graphics which are the same as the 3D picture to be cut and serve as a cutting shape object.

8. The 3D picture clipping terminal according to claim 6, wherein in the S1, the generating of the clipping box object specifically includes:

generating a crop box object on the crop shape object;

setting the initial size of the cropping frame object to cover the 3D picture to be cropped;

setting the crop box object to be draggable and changeable in size;

and limiting the cropping frame object not to exceed the range of the 3D picture to be cropped.

9. The 3D picture cropping terminal according to claim 6, wherein the S3 specifically is:

replacing a shader rendering the 3D picture to be cropped with a shader with a lower brightness value;

and setting the brightness value of a shader for rendering the 3D picture to be clipped in the clipping frame object to be normal.

10. The 3D picture clipping terminal according to claim 7, wherein the copying of the 3D picture texture to be clipped in the clip object onto the clipping shape object in S4 specifically includes:

replacing a shader which renders the texture of the cropped shape object and can display the 3D picture to be cropped with a shader which can normally display the texture of the cropped shape object;

and copying the texture of the 3D picture to be clipped in the clipping frame object to the clipping shape object replaced by the rendering shader.

Technical Field

The invention relates to the field of image processing, in particular to a 3D picture clipping method and a terminal.

Background

The 3D picture is a 3D element with a wide use scene, and in some cases, a user needs to perform clipping operation on the 3D picture on the premise of not losing texture information of an original 3D picture, but the existing 3D picture clipping methods directly copy the texture information of a designated area, then generate a new 3D picture according to the copied content, the clipped picture cannot be restored, the user cannot preview the clipping result, and the use experience of the user is poor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided are a 3D picture clipping method and a terminal, which enable a user to preview a clipping result in a clipping process and restore a clipped picture.

In order to solve the technical problems, the invention adopts a technical scheme that:

A3D picture cropping method comprises the following steps:

s1, receiving a picture cutting instruction, and generating a cutting shape object and a cutting frame object;

s2, covering the cutting shape object on a 3D picture to be cut;

s3, previewing the cutting result in the cutting box object;

s4, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object when receiving the cutting confirmation instruction, and closing the texture display of the 3D picture to be cut;

and S5, when a reduction instruction is received, deleting the cutting shape object and starting texture display of the 3D picture to be cut.

In order to solve the technical problem, the invention adopts another technical scheme as follows:

a 3D picture cropping terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:

s1, receiving a picture cutting instruction, and generating a cutting shape object and a cutting frame object;

s2, covering the cutting shape object on a 3D picture to be cut;

s3, previewing the cutting result in the cutting box object;

s4, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object when receiving the cutting confirmation instruction, and closing the texture display of the 3D picture to be cut;

and S5, when a reduction instruction is received, deleting the cutting shape object and starting texture display of the 3D picture to be cut.

The invention has the beneficial effects that: the original picture is covered by the cutting shape object, the cutting frame object is generated, the cutting result in the cutting frame object is previewed, the texture of the original picture in the cutting frame is copied to the cutting shape object when the cutting is confirmed, the cutting operation on the partial picture in the cutting frame is changed into the copying operation on the partial picture copied to the cutting shape object, the picture after cutting is convenient to restore, when the original picture is obtained by restoring, only the cutting shape object needs to be deleted and the texture of the original picture needs to be displayed, the cutting result can be previewed in the cutting process, and the cut picture can be conveniently restored.

Drawings

FIG. 1 is a flowchart illustrating steps of a 3D image cropping method according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a 3D picture clipping terminal according to an embodiment of the present invention;

fig. 3 is a schematic flowchart of a specific application scenario of a 3D image clipping method according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating the effect of each step in the implementation process of the 3D picture clipping method according to the embodiment of the present invention;

description of reference numerals:

1. a 3D picture clipping terminal; 2. a processor; 3. a memory.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1, a method for clipping a 3D picture includes the steps of:

s1, receiving a picture cutting instruction, and generating a cutting shape object and a cutting frame object;

s2, covering the cutting shape object on a 3D picture to be cut;

s3, previewing the cutting result in the cutting box object;

s4, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object when receiving the cutting confirmation instruction, and closing the texture display of the 3D picture to be cut;

and S5, when a reduction instruction is received, deleting the cutting shape object and starting texture display of the 3D picture to be cut.

From the above description, the beneficial effects of the present invention are: the original picture is covered by the cutting shape object, the cutting frame object is generated, the cutting result in the cutting frame object is previewed, the texture of the original picture in the cutting frame is copied to the cutting shape object when the cutting is confirmed, the cutting operation on the partial picture in the cutting frame is changed into the copying operation on the partial picture copied to the cutting shape object, the picture after cutting is convenient to restore, when the original picture is obtained by restoring, only the cutting shape object needs to be deleted and the texture of the original picture needs to be displayed, the cutting result can be previewed in the cutting process, and the cut picture can be conveniently restored.

Further, in S1, the generating of the cut shape object specifically includes:

generating a two-dimensional vector graph with the same size as the 3D picture to be cut;

changing a shader rendering the two-dimensional vector graphics into textures capable of displaying a 3D picture to be clipped;

and adding thickness information to the two-dimensional vector graphics, and generating three-dimensional vector graphics which are the same as the 3D picture to be cut and serve as a cutting shape object.

According to the description, the vector graphics are used as the cutting shape object, the scaling operation is convenient, the sizes of the vector graphics and the picture to be cut are enabled to be equal, the texture display on the vector graphics is controlled by changing the shader, the display mode can be set more conveniently according to actual needs, and the generation efficiency of the cutting shape object is improved by generating the two-dimensional graphics first and then adding the thickness to generate the three-dimensional graphics.

Further, in S1, the generating of the crop box object specifically includes:

generating a crop box object on the crop shape object;

setting the initial size of the cropping frame object to cover the 3D picture to be cropped;

setting the crop box object to be draggable and changeable in size;

and limiting the cropping frame object not to exceed the range of the 3D picture to be cropped.

According to the method, the cutting frame is generated on the cutting shape object, cutting operation is not performed on the 3D picture to be cut, the picture after cutting is convenient to restore in the later period, the size of the cutting frame object can be changed by dragging, a user can freely perform cutting operation, the selection of the cutting range is more flexible, the range of the cutting frame is limited in the 3D picture to be cut, and the situation that the user makes mistakes in cutting due to the fact that the region of the user outside the 3D picture to be cut is inserted into the cutting frame is avoided.

Further, the S3 specifically includes:

replacing a shader rendering the 3D picture to be cropped with a shader with a lower brightness value;

and setting the brightness value of a shader for rendering the 3D picture to be clipped in the clipping frame object to be normal.

As can be seen from the above description, the shader of the 3D picture to be cropped is replaced with a shader with a lower brightness value, and the brightness value of the shader of the 3D picture to be cropped in the crop box object is normal, so that the user can clearly recognize the range of the cropping area, and the cropping effect can be previewed.

Further, the copying, in the S4, the 3D picture texture to be cropped in the crop box object onto the crop shape object specifically includes:

replacing a shader which renders the texture of the cropped shape object and can display the 3D picture to be cropped with a shader which can normally display the texture of the cropped shape object;

and copying the texture of the 3D picture to be clipped in the clipping frame object to the clipping shape object replaced by the rendering shader.

According to the description, the texture in the cutting frame area on the 3D picture to be cut is copied to the cutting shape object, cutting is finished without cutting the 3D picture to be cut, the cut picture is conveniently restored at the later stage, the texture display control of the cutting shape object is realized by using the change of the shader, and the characteristic of the shader is fully utilized.

Referring to fig. 2, a 3D image cropping terminal includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the following steps when executing the computer program:

s1, receiving a picture cutting instruction, and generating a cutting shape object and a cutting frame object;

s2, covering the cutting shape object on a 3D picture to be cut;

s3, previewing the cutting result in the cutting box object;

s4, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object when receiving the cutting confirmation instruction, and closing the texture display of the 3D picture to be cut;

and S5, when a reduction instruction is received, deleting the cutting shape object and starting texture display of the 3D picture to be cut.

The invention has the beneficial effects that: the original picture is covered by the cutting shape object, the cutting frame object is generated, the cutting result in the cutting frame object is previewed, the texture of the original picture in the cutting frame is copied to the cutting shape object when the cutting is confirmed, the cutting operation on the partial picture in the cutting frame is changed into the copying operation on the partial picture copied to the cutting shape object, the picture after cutting is convenient to restore, when the original picture is obtained by restoring, only the cutting shape object needs to be deleted and the texture of the original picture needs to be displayed, the cutting result can be previewed in the cutting process, and the cut picture can be conveniently restored.

Further, in S1, the generating of the cut shape object specifically includes:

generating a two-dimensional vector graph with the same size as the 3D picture to be cut;

changing a shader rendering the two-dimensional vector graphics into textures capable of displaying a 3D picture to be clipped;

and adding thickness information to the two-dimensional vector graphics, and generating three-dimensional vector graphics which are the same as the 3D picture to be cut and serve as a cutting shape object.

According to the description, the vector graphics are used as the cutting shape object, the scaling operation is convenient, the sizes of the vector graphics and the picture to be cut are enabled to be equal, the texture display on the vector graphics is controlled by changing the shader, the display mode can be set more conveniently according to actual needs, and the generation efficiency of the cutting shape object is improved by generating the two-dimensional graphics first and then adding the thickness to generate the three-dimensional graphics.

Further, in S1, the generating of the crop box object specifically includes:

generating a crop box object on the crop shape object;

setting the initial size of the cropping frame object to cover the 3D picture to be cropped;

setting the crop box object to be draggable and changeable in size;

and limiting the cropping frame object not to exceed the range of the 3D picture to be cropped.

According to the method, the cutting frame is generated on the cutting shape object, cutting operation is not performed on the 3D picture to be cut, the picture after cutting is convenient to restore in the later period, the size of the cutting frame object can be changed by dragging, a user can freely perform cutting operation, the selection of the cutting range is more flexible, the range of the cutting frame is limited in the 3D picture to be cut, and the situation that the user makes mistakes in cutting due to the fact that the region of the user outside the 3D picture to be cut is inserted into the cutting frame is avoided.

Further, the S3 specifically includes:

replacing a shader rendering the 3D picture to be cropped with a shader with a lower brightness value;

and setting the brightness value of a shader for rendering the 3D picture to be clipped in the clipping frame object to be normal.

As can be seen from the above description, the shader of the 3D picture to be cropped is replaced with a shader with a lower brightness value, and the brightness value of the shader of the 3D picture to be cropped in the crop box object is normal, so that the user can clearly recognize the range of the cropping area, and the cropping effect can be previewed.

Further, the copying, in the S4, the 3D picture texture to be cropped in the crop box object onto the crop shape object specifically includes:

replacing a shader which renders the texture of the cropped shape object and can display the 3D picture to be cropped with a shader which can normally display the texture of the cropped shape object;

and copying the texture of the 3D picture to be clipped in the clipping frame object to the clipping shape object replaced by the rendering shader.

According to the description, the texture in the cutting frame area on the 3D picture to be cut is copied to the cutting shape object, cutting is finished without cutting the 3D picture to be cut, the cut picture is conveniently restored at the later stage, the texture display control of the cutting shape object is realized by using the change of the shader, and the characteristic of the shader is fully utilized.

Referring to fig. 1, a first embodiment of the present invention is:

A3D picture clipping method specifically comprises the following steps:

s1, receiving a picture cutting instruction, and generating a cutting shape object and a cutting frame object;

the generating of the cutting shape object specifically comprises:

generating a two-dimensional vector graph with the same size as the 3D picture to be cut;

specifically, a 2DShape graph (two-dimensional vector graph) with the same size as the original graph is generated by using a SVG import library;

changing a shader rendering the two-dimensional vector graphics into textures capable of displaying a 3D picture to be clipped;

adding thickness information to the two-dimensional vector graph to generate a three-dimensional vector graph which is the same as the 3D picture to be cut and serves as a cutting shape object;

specifically, adding the same thickness information as the 3D picture to be cut to the 2D hope graphic to generate a 3D scape graphic (three-dimensional vector graphic) as a cut shape object;

the generating of the crop box object specifically comprises:

generating a crop box object on the crop shape object;

setting the initial size of the cropping frame object to cover the 3D picture to be cropped;

setting the crop box object to be draggable and changeable in size;

limiting the range of the cropping frame object not to exceed the range of the 3D picture to be cropped;

s2, covering the cutting shape object on a 3D picture to be cut;

s3, previewing the cutting result in the cutting box object;

the method specifically comprises the following steps:

replacing a shader rendering the 3D picture to be cropped with a shader with a lower brightness value;

preferably, when the picture clipping instruction is received, a shader rendering the 3D picture to be clipped is replaced with a shader having a lower brightness value;

setting the brightness value of a shader for rendering the 3D picture to be clipped in the clipping frame object to be normal;

s4, copying the texture of the 3D picture to be cut in the cutting frame object to the cutting shape object when receiving the cutting confirmation instruction, and closing the texture display of the 3D picture to be cut;

the copying of the 3D picture texture to be cropped in the crop box object onto the crop shape object specifically comprises:

replacing a shader which renders the texture of the cropped shape object and can display the 3D picture to be cropped with a shader which can normally display the texture of the cropped shape object;

copying the texture of the 3D picture to be clipped in the clipping frame object to the clipping shape object replaced by the rendering shader;

and S5, when a reduction instruction is received, deleting the cutting shape object and starting texture display of the 3D picture to be cut.

Referring to fig. 3, the second embodiment of the present invention is:

the 3D picture clipping method is applied to an actual scene:

e1, reading the texture array information of the picture by using DevIL, and performing 3D display by an Image component of Unity, specifically:

reading Texture array information of a 3D picture to be cut out based on DevIL (a graphic open source library), and saving the 3D picture to be cut out as Texture2D (a picture format) information which can be identified by Unity (a development tool);

loading the Texture2D information of the locally stored 3D picture to be cropped in the Unity, and performing 3D display through an Image component;

e2, generating a cutting shape object and a cutting frame, specifically:

a user sends a clipping instruction, and a material rendering shader (shader) of a 3D picture to be clipped is replaced by a shader with a lower brightness value;

generating a 2D hope graph (two-dimensional vector graph) with the same size as the original graph through a SVG import library plug-in, and setting a shader rendering the 2D hope graph to normally display texture information of a 3D picture to be clipped;

wherein, set up and render the shader of 2DShape figure is normal display, and the texture region that waits to be cut except that 2DShape figure is transparent display area on the 3D picture of waiting to cut specifically is:

adjusting the template test setting in a shader for rendering the texture area to be cut out of the graph, enabling the shader not to render the pixel point of the texture area to be cut out on the graph by using the main texture, and closing the depth test in the shader;

setting an alpha channel of the shader to be transparent;

a vertex shader and a fragment shader in the shader render the 2DShape graph;

the size of the initially generated 2DShape graph is the same as that of the original graph, so that the texture area to be cut except the initial 2DShape graph is 0;

preferably, referring to fig. 4(c), the 2DShape graph is associated with a crop box object, and the 2DShape graph is adjusted according to a change of the crop box, where a texture region to be cut is a region of the 3D picture to be cut except for the 2DShape graph;

adding the same thickness as the 3D picture to be cut to the 2D hope graph to generate a cut shape object;

adding a cutting frame object on the cutting shape object, wherein the cutting frame object allows a user to drag and change the position and the size of the cutting frame object in the area of the 3D picture to be cut, so that the cutting area is dynamically adjusted;

e3, judging whether the user dynamically adjusts the clipping area, if so, performing the step E31, otherwise, performing the step E4;

e31, various operations of the user on the cutting box object in the process of dynamically adjusting the cutting area are realized through a Gizmo plug-in Unity, the plug-in can dynamically adjust the size and the position of the cutting box object on the 3D picture to be cut according to the selection, the scaling and the mobile messages of the object, and the size and the position of the cutting shape can be changed according to the input of the user;

changing a shader rendering a 3D picture to be cropped in the crop box object into a shader with a normal brightness value, specifically:

adjusting the template test setting in a shader rendering the 2D hope graph to enable the shader to render each pixel point of the 3D image to be clipped in the clipping frame;

reading main textures of a 3D picture to be cut;

setting an alpha channel of the shader to be opaque;

a vertex shader and a fragment shader in the shaders render the 3D picture to be clipped according to the main texture and an alpha channel set value;

e4, judging whether the user confirms the cutting effect, if so, performing the step E5, otherwise, returning to the step E3;

e5, receiving a clipping confirmation instruction sent by a user, modifying a shader for clipping a shape object, and hiding a texture display of a 3D picture to be clipped, specifically:

replacing a shader rendering the cropped shape object with a shader capable of normally displaying the texture of the cropped shape object;

copying the texture of the 3D picture to be cut in the cutting frame object onto the cutting shape object, and closing the texture display of the 3D picture to be cut;

e6, judging whether the user restores the picture, if so, performing a step E7, and if not, ending the cutting operation;

e7, receiving a reduction instruction sent by a user, deleting the cut shape object, starting texture display of the 3D picture to be cut, and ending the cutting operation;

referring to fig. 4, which is a schematic view showing effects of various steps in the implementation process, fig. 4(a) reads in a 3D picture to be cut; after entering the cropping state, the cropping frame object covers the whole 3D picture to be cropped by default; FIG. 4(c) drag the cropping frame to change position, and perform a zoom operation on the cropping frame, where the 3D picture to be cropped is rendered by the low-brightness shader, and the 3D picture to be cropped in the cropping frame object is rendered normally; FIG. 4(D) confirms the clipping result, copies the texture of the 3D picture to be clipped within the clip box object onto the clipping shape object, and closes the texture display of the 3D picture to be clipped; and (e) receiving a reduction instruction, deleting the cutting shape object, starting the texture display of the 3D picture to be cut, and generating a cutting shape object and a cutting frame object if the cutting operation is to be continued.

Referring to fig. 2, a third embodiment of the present invention is:

a 3D picture cropping terminal 1, the terminal 1 comprising a processor 2, a memory 3 and a computer program stored on the memory 3 and executable on the processor 2, the processor 2 implementing the steps of embodiment one or embodiment two when executing the computer program.

In summary, the invention provides a 3D picture clipping method and a terminal, by setting a clipping shape object, when clipping is performed, a shader rendering a 3D picture to be clipped is replaced by a low-brightness shader, the shader rendering the clipping shape object is set to display the texture of the 3D picture to be clipped, a clipping frame object is set on the clipping shape object, the shader rendering the 3D picture to be clipped in the clipping frame object is set to normal brightness, and the clipping result is previewed in the clipping process; moreover, the cutting frame object can carry out position dragging and zooming operation, a user can flexibly select a cutting area, the range of the cutting frame object is set in the 3D picture to be cut, and abnormal reading and writing caused by the fact that the area in the cutting frame object exceeds the 3D picture to be cut is prevented; the cutting shape object is a vector graph, the occupied memory is small, and the scaling operation is convenient to achieve the same size as the 3D picture to be cut.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.