CN113393584A - Color processing method, device and equipment of three-dimensional model and storage medium - Google Patents
Color processing method, device and equipment of three-dimensional model and storage medium Download PDFInfo
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Abstract
The invention belongs to the technical field of three-dimensional printing, and particularly provides a color processing method, a device, equipment and a storage medium for a three-dimensional model. The method comprises the following steps: acquiring a three-dimensional model to be printed; slicing the three-dimensional model to obtain a plurality of laminas; acquiring color information of a first pixel point; adjusting the color information of a first pixel point closest to a second pixel point to be used as the color information of the second pixel point; the consumable quantity represented by the color information of the second pixel points is smaller than that represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero. According to the embodiment of the invention, the color information of the first pixel point closest to the second pixel point is used as the color information after being adjusted, so that the cost of one or more printing consumables is reduced while the internal color printing is realized.
Description
Technical Field
The invention relates to the technical field of three-dimensional printing, in particular to a color processing method, a device, equipment and a storage medium of a three-dimensional model.
Background
Three-dimensional printing is also known as additive manufacturing, 3D printing (3D printing, 3 DP). Three-dimensional printing belongs to a rapid prototyping technology, which is a technology for constructing a three-dimensional object by using a specific bondable material and a layer-by-layer printing mode on the basis of a three-dimensional model.
The three-dimensional printing mainly comprises the following steps: firstly, modeling a three-dimensional object to be printed by using three-dimensional design software; secondly, based on a specific printing device, printing is carried out by using related materials, and then a corresponding three-dimensional object is manufactured.
With the increasingly mature three-dimensional printing technology, people have higher and higher requirements on three-dimensional objects manufactured by three-dimensional printing, and not only pure-color products but also products with various colors can be manufactured by three-dimensional printing.
However, in the prior art, when three-dimensional printing is carried out, due to the lack of a reasonable color processing method, the colors of the three-dimensional model are difficult to be reasonably controlled, and the colored three-dimensional model is difficult to print. Meanwhile, the fact that products with multiple colors are manufactured means that a large number of color printing consumables are consumed to perform color superposition, and the cost of the printing consumables is high.
Disclosure of Invention
In view of this, embodiments of the present invention provide a color processing method, apparatus, device and storage medium for a three-dimensional model, so as to solve the technical problem that the cost of printing consumables is large when a color three-dimensional object is manufactured in the prior art.
In a first aspect, an embodiment of the present invention provides a color processing method for a three-dimensional model, where the method includes:
s1: obtaining a three-dimensional model to be printed, wherein the outer surface of the three-dimensional model comprises at least two colors;
s2: slicing the three-dimensional model to obtain a plurality of laminas; the pixel points marked at the edge of the layer slice are first pixel points, and the pixel points marked in the layer slice are second pixel points;
s3: acquiring color information of the first pixel point;
s4: determining color information of a second pixel point; the determining the color information of the second pixel point includes: adjusting the color information of a first pixel point closest to a second pixel point to be used as the color information of the second pixel point; the consumable quantity represented by the color information of the second pixel points is smaller than that represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero.
According to the embodiment of the invention, the three-dimensional model with at least 2 colors on the outer surface is sliced to obtain a plurality of laminas, a colorful three-dimensional object can be manufactured without setting the colors of the outer surface, and the subsequent processing is carried out based on the colors of the three-dimensional model, so that the three-dimensional object manufactured by three-dimensional printing can restore the three-dimensional model in three-dimensional design software with high quality, the consistency of products during design and manufacture is ensured, and the industrial production is facilitated. Meanwhile, when color information of pixel points (namely second pixel points) inside the layer sheet is set, the color information is set according to the color information of the pixel points (namely first pixel points) at the edge of the layer sheet closest to the pixel points, and consumable quantity represented by the color information of the second pixel points is smaller than consumable quantity represented by the color information of the corresponding first pixel points, and consumable quantity represented by the color information of at least one second pixel point is not zero, namely, the fact that the inside of the printing layer sheet has certain color is realized, and the printing layer sheet has certain similarity with the color of the outer surface closest to the color, and meanwhile, printing consumable expenses inside the printing layer sheet are reduced.
Preferably, in the S4, the method includes:
s41: determining a normal vector of the first pixel point, wherein the normal vector is perpendicular to a tangent line of a layer slice of the first pixel point, and the normal vector points to the inside of the layer slice from the edge of the layer slice;
s42: and adjusting the color information of the first pixel point to be used as the color information of a second pixel point positioned in the normal vector direction of the first pixel point.
The embodiment of the invention can determine which one of the first pixel points is closer to the second pixel point by determining the normal vector of each first pixel point and judging which normal vector the second pixel point is positioned on, is more convenient to realize, can quickly set the color information of the second pixel point, and improves the color processing efficiency of the three-dimensional model.
Preferably, for a second pixel point located on the same normal vector, a linear distance between the second pixel point and the first pixel point corresponding to the normal vector is inversely related to the consumable quantity represented by the color information of the second pixel point.
According to the embodiment of the invention, the represented consumable amount of the second pixel point which is farther away from the first pixel point is controlled to be lower, so that the expense of printing consumable is compressed to the maximum degree, and the represented consumable amount of the second pixel point which is closer to the first pixel point is controlled to be higher, so that the internal color and the color of the outer edge of the laminated sheet are ensured to be the same to the maximum degree, the visual effect of gradual change of the color of the laminated sheet from outside to inside is realized visually, the visual effect of the internal color is ensured, the color of the outer surface is not easy to see when the color of the outer surface falls off due to friction, impact and the like, and the printing consumable is saved.
Preferably, in the S4, the method includes:
s401: acquiring a color processing width;
s402: determining a color processing region according to the edges of the ply and the color processing width; wherein the color treated region has an area less than an area of the ply, the color treated region including an edge of the ply;
s403: and determining the color information of a second pixel point positioned in the color processing area.
The embodiment of the invention determines the color processing area by acquiring the color processing width and the edges of the lamellae, so that the area of the color processing area is smaller than that of the lamellae, and determines the color information of the pixel points positioned in the color processing area. Therefore, only data corresponding to the color processing area among the image dot matrix data obtained by the subsequent halftone processing is used to instruct the printing apparatus to eject the printing consumables, thereby reducing the consumption of the printing consumables as much as possible, thereby reducing the manufacturing cost of the three-dimensional object. Because the edge of the layer sheet is positioned in the color processing area, when the halftone processing is carried out, the pixel points at the edge of the layer sheet are processed, so that the consumption of printing consumables is reduced, and the surface of the three-dimensional object manufactured during the three-dimensional printing is ensured to have multiple colors.
Preferably, S5: constructing image dot matrix data; the constructing of the image lattice data comprises: performing halftone processing on the layer sheet with the determined color information of the second pixel point to obtain first image dot matrix data;
s6: executing printing; the performing printing includes: and executing printing according to the first image dot matrix data.
Preferably, in S5, the constructing image lattice data further includes: judging whether the color processing width is larger than or equal to a set value, if so, performing reverse processing on the first image dot matrix data to obtain second image dot matrix data;
in the S6, the performing printing further includes: and executing printing according to the second image dot matrix data by using specified consumables.
According to the embodiment of the invention, the color processing width is judged to determine whether the color processing width is larger than or equal to the set value, and when the color processing width is larger than or equal to the set value, in order to avoid the phenomenon that the three-dimensional model is deformed or the color surface is displaced due to the influence on the structural strength of the three-dimensional object caused by excessive reduction of printing consumables, the first image dot matrix data is subjected to reverse processing to obtain the second image dot matrix data, and printing is performed by using the specified consumables according to the second image dot matrix data, so that the structural strength of the three-dimensional model is improved, and the quality of the product is ensured. When the color processing width is smaller than the set value, the consumable materials are reduced on the surface of the three-dimensional model, the structural strength of the three-dimensional object is not affected, and the corresponding processing can not be performed.
Preferably, the consumable quantity represented by the color information of the second pixel point is smaller than the consumable quantity represented by the color information of the corresponding first pixel point, and the method includes: the consumable quantity represented by at least one color channel in the second pixel point is less than the consumable quantity represented by the same color channel in the corresponding first pixel point; or the total material consumption represented by all the color channels in the second pixel point is less than the total material consumption represented by all the color channels in the corresponding first pixel point.
Because the cost of various printing consumables is different, some printing consumables cost is lower, consequently, when carrying out the colour setting of second pixel point, can not adjust the colour channel that these printing consumables correspond to the influence to the color is less. Alternatively, all color channels may be adjusted to maximize the savings in printing consumables.
In a second aspect, an embodiment of the present invention provides a color processing apparatus for a three-dimensional model, where the apparatus includes:
the three-dimensional model acquisition module is used for acquiring a three-dimensional model to be printed, and the outer surface of the three-dimensional model comprises at least two colors;
the slicing processing module is used for slicing the three-dimensional model to obtain a plurality of slices; the pixel points marked at the edge of the layer slice are first pixel points, and the pixel points marked in the layer slice are second pixel points;
the first pixel point color information determining module is used for acquiring the color information of the first pixel point;
the second pixel point color information determining module is used for determining the color information of the second pixel point; the determining the color information of the second pixel point includes: adjusting the color information of a first pixel point closest to a second pixel point to be used as the color information of the second pixel point; the consumable quantity represented by the color information of the second pixel points is smaller than that represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero.
In a third aspect, an embodiment of the present invention provides a printing apparatus, including: at least one processor, at least one memory, and computer program instructions stored in the memory, which when executed by the processor, implement the method of the first aspect of the embodiments described above.
In a fourth aspect, embodiments of the present invention provide a storage medium having stored thereon computer program instructions, which when executed by a processor, implement the method of the first aspect in the above embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without any creative effort, other drawings may be obtained according to the drawings, and these drawings are all within the protection scope of the present invention.
Fig. 1 is a schematic process diagram of three-dimensional printing according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a color processing method for a three-dimensional model according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a slicing process according to an embodiment of the present invention.
Fig. 4 is a flowchart illustrating a method for setting color information of a second pixel according to an embodiment of the present invention.
Fig. 5 is a schematic view of a ply provided by an embodiment of the present invention.
Fig. 6 is a flowchart illustrating another method for setting color information of a second pixel according to an embodiment of the present invention.
FIG. 7 is a schematic view of another ply provided by an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a color processing apparatus according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a printing apparatus according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, 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 merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Fig. 1 is a schematic diagram of a three-dimensional printing process according to an embodiment of the present invention. Specifically, the three-dimensional printing in the embodiment of the present invention is realized based on slicing processing, and after the three-dimensional model is obtained, the three-dimensional model is sliced to obtain a plurality of layers; then carrying out color processing on the laminated sheet; then, the color-processed layer sheets are subjected to halftone processing and converted into a file format which can be recognized by printing equipment, namely image dot matrix data; and then controlling a spray head to print according to the image dot matrix data. It should be noted that each process may be implemented by different equipment or devices. For example, the dicing process and the color process are implemented by an upper computer, the halftone process is performed by a Raster Image Processor (RIP), and the printing is performed by a printing apparatus. Of course, all the above processes can be directly realized by the printing device, and the invention is not particularly limited.
Referring to fig. 2, a flow chart of a color processing method for a three-dimensional model according to an embodiment of the present invention is shown, which includes the following steps:
s1: obtaining a three-dimensional model to be printed, wherein the outer surface of the three-dimensional model comprises at least two colors;
s2: slicing the three-dimensional model to obtain a plurality of laminas; the pixel points marked at the edge of the layer slice are first pixel points, and the pixel points marked in the layer slice are second pixel points;
s3: acquiring color information of the first pixel point;
s4: determining color information of a second pixel point; the determining the color information of the second pixel point includes: adjusting the color information of a first pixel point closest to a second pixel point to be used as the color information of the second pixel point; the consumable quantity represented by the color information of the second pixel points is smaller than that represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero.
Specifically, the shape of the three-dimensional model is not particularly limited in the embodiments of the present invention, and may be, for example, a prism, a cylinder, a sphere, or another irregular three-dimensional model. The three-dimensional model is usually established based on three-dimensional design software, and the data formats of the three-dimensional model at present mainly include OSGB, OBJ, FBX, 3DS, STL, DAE, DGN and the like. The outer surface of the three-dimensional model obtained by the embodiment of the invention comprises at least 2 colors. The embodiment of the invention preferably adopts a data format which can describe the color information of the three-dimensional model. Of course, the data format that cannot describe the color information of the three-dimensional model may be set for the color of the outer surface of the model when the model is obtained.
After the three-dimensional model is acquired, it is sliced. Specifically, the three-dimensional model is described as a cylinder, and as shown in fig. 3, the slicing process of the three-dimensional model means that the three-dimensional model 10 is discretized into a series of lamellae 20.
After slicing processing, the pixel points at the edge of the layer slice have color information, so that the color information can be directly obtained. Specifically, the color information includes color values of color channels of the pixel points, that is, color components. For example, in the CMYK color mode, the color information includes a color value of a Cyan color channel (Cyan), a color value of a Magenta color channel (Magenta), a color value of a Yellow color channel (Yellow), and a color value of a Black color channel (Black). For example, in the RGB color mode, the color information includes a color value of a Red channel (Red), a color value of a Green channel (Green), and a color value of a Blue channel (Blue). The present invention is not particularly limited to the color mode.
Since it is difficult to design colors inside the three-dimensional model when modeling; or, the three-dimensional model in some data formats only stores information of an outer envelope (i.e., an outer surface) of the three-dimensional model, so that the embodiment of the present invention secondarily sets color information of pixels inside the layer. Specifically, for the second pixel point, the first pixel point closest to the second pixel point is determined, then the color information of the first pixel point is adjusted, the consumable quantity represented by the color information is reduced, and then the consumable quantity is used as the color information of the second pixel point.
It should be noted that, in this embodiment, the consumable quantity represented by the color information of the second pixel point is smaller than the consumable quantity represented by the color information of the corresponding first pixel point, which includes 2 different schemes, and the scheme can be selected according to a specific application scenario. Wherein, the first scheme is as follows: and the consumable amount represented by at least one color channel in the second pixel point is less than the consumable amount represented by the same color channel in the corresponding first pixel point. In other words, when the color information of the first pixel is adjusted to the color information of the second pixel, only whether the consumable quantity represented by one or more color channels is reduced or not is concerned, regardless of whether the consumable quantity represented by other color channels is reduced or improved. For example, in the CMYK mode, attention may be paid to whether the amount of consumables characterized by only the cyan channel is reduced or whether the amounts of consumables characterized by only the cyan channel and the magenta channel are reduced. Of course, it may be set that the amounts of consumables respectively represented by the cyan, magenta, yellow, and black channels are all reduced. The second scheme is as follows: and the total material consumption represented by all the color channels in the second pixel point is less than the total material consumption represented by all the color channels in the corresponding first pixel point. For example, in the CMYK mode, it is necessary to ensure that the total amount of consumable items represented by the cyan, magenta, yellow, and black channels is reduced.
The consumable may be ink, such as cyan ink, magenta ink, yellow ink, and black ink, among others. The consumable can also be resin, powder, glue, and the like. For ease of description, the following description will be in terms of ink.
It should be noted that, depending on the color mode, the color information is adjusted in a different manner in order to adjust the consumable amount indicated by the color information. For example, in the CMYK color mode, the larger the color component of each color channel, the larger the amount of consumable material characterized. For example, if the cyan component of one pixel is 50%, and the cyan component of another pixel is 20%, the consumable quantity represented by the pixel whose cyan component is 50% is larger. Thus, for the CMYK mode, reducing the amount of consumable material represented by the color information may be accomplished by reducing the individual color components. In the RGB color mode, the smaller the color component of each color channel, the greater the amount of consumable characterized. For example, if the red component of one pixel is 200 and the red component of the other pixel is 20, the consumable quantity represented by the pixel with the red component of 20 is larger. Thus, for an RGB color model, reducing the amount of consumable material characterized by color information may be achieved by increasing the individual color components.
Therefore, the following technical solutions are proposed in the embodiments of the present invention for application scenarios in which different color modes may exist. First, after the slice is acquired, it is converted into a preset color mode (for example, CMYK color mode), and then the color information can be adjusted by uniformly reducing the color components. Or after the layer sheet is obtained, the color mode of the layer sheet is judged, and then the color information is adjusted in a corresponding mode.
Based on the above processing, the color processing of the sheet is completed, and printing can be performed after the subsequent processing. It should be noted that, after the color processing, it needs to be ensured that the amount of consumable items represented by the color information of at least one second pixel is not zero. For example, in the CMYK mode, there is at least one color component of at least one second pixel point that is not zero. When the color information of the pixel points (namely the second pixel points) in the ply is set, the setting is carried out according to the color information of the pixel points (namely the first pixel points) at the edge of the nearest ply, the consumable quantity represented by the color information of the second pixel points is ensured to be smaller than the consumable quantity represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero, so that the printing consumable cost in the printing ply is reduced, and the printing consumable quantity has a certain color and a certain similarity with the color of the outer surface nearest to the second pixel point.
Fig. 4 is a schematic flow chart of a method for setting color information of a second pixel according to an embodiment of the present invention, including the following steps:
s41: determining a normal vector of the first pixel point, wherein the normal vector is perpendicular to a tangent line of a layer slice of the first pixel point, and the normal vector points to the inside of the layer slice from the edge of the layer slice;
s42: and adjusting the color information of the first pixel point to be used as the color information of a second pixel point positioned in the normal vector direction of the first pixel point.
For ease of understanding, please refer to FIG. 5. For the ply 20, first a tangent 22 to the outer edge 21 is made to the first pixel point a, and then a perpendicular to the tangent 22, which is directed from the edge 21 of the ply 20 to the inside of the ply, is made, which is the normal vector 23 to the first pixel point a. Since the second pixel point B is located on the normal vector 23 of the first pixel point a, the color information of the first pixel point a is adjusted to be used as the color information of the second pixel point B. It should be noted that, when the second pixel B is located on different normal vectors, it can be determined which first pixel is closer to the first pixel corresponding to which normal vector, and the color information of which first pixel is used as the adjustment basis. And when the distances are the same, arbitrarily selecting the color information of one first pixel point as an adjustment basis.
Based on the principle, traversing each first pixel point can complete the color processing of the whole layer.
Furthermore, in another preferred embodiment of the present invention, for a second pixel located on the same normal vector, a linear distance between the second pixel and the first pixel corresponding to the normal vector is inversely related to a consumable quantity represented by the color information of the second pixel.
For example, for the second pixel point B and the second pixel point E, since they are both located on the normal vector 23, the color information of the first pixel point a is adjusted to be used as the color information thereof. The linear distance between the second pixel point B and the first pixel point A is shorter, so that the consumable quantity represented by the color information of the second pixel point B is larger than that represented by the color information of the second pixel point E. For example, the color information of the first pixel a is C50%, M60%, Y10%, and K0%. The color information that can be set as the second pixel E is C50% w1, M60% w2, Y10% w3, and K0% w 4. W1, w2, w3 and w4 are real numbers which are greater than 0 and smaller than 1, and w1, w2, w3 and w4 can be equal or unequal. In this case, the cyan component of the second pixel B is set to be greater than 50% w1 and less than 50%, the magenta component is set to be greater than 60% w2 and less than 60%, the yellow component is set to be greater than 10% w3 and less than 10%, and the black component is set to be 0%.
In order to improve the transition effect to the maximum extent, the color information of the second pixel points located on the normal vector 23 may be set to be in uniform transition, that is, for the second pixel points located on the normal vector 23, the difference values of the color information of any adjacent 2 second pixel points are equal.
Fig. 6 is a schematic flow chart of another method for determining color information of a second pixel according to an embodiment of the present invention, including the following steps:
s401: acquiring a color processing width;
s402: determining a color processing region according to the edges of the ply and the color processing width; wherein the color treated region has an area less than an area of the ply, the color treated region including an edge of the ply;
s403: and determining the color information of a second pixel point positioned in the color processing area.
For ease of understanding, please refer to FIG. 7. From the edge 21 of the ply 20 and the color-treated width D, a color-treated region can be determined, the outer edge of which is the outer edge of the ply 20. It should be noted that the color processing width D can be expressed by the number of pixels.
When the color information of the second pixel point is set, only the second pixel point located in the color processing region may be set, and the color information of the second pixel point E located in the filling region is not set, it should be noted that the second pixel point B located at the edge of the color processing region may also be set.
In order to improve processing efficiency, when the color information of the first pixel point a is C50%, M60%, Y10%, and K0%, the color information of the second pixel point B may be set to C50% w1, M60% w2, Y10% w3, and K0% w4, the second pixel point located between the first pixel point a and the second pixel point B and located in the normal vector 23 is configured to decrease the consumable quantity represented by the color information of the second pixel point a from the second pixel point closest to the first pixel point a, but not smaller than the consumable quantity represented by the color information of the second pixel point B all the time. With this embodiment, a gradual change in minimum concentration can be set for ease of control.
In a preferred embodiment of the present invention, the method further comprises:
determining a filling area, wherein the filling area is an area except for the color processing area in the ply;
and setting the color information of all pixel points in the filling area to only comprise specified colors, wherein the specified colors are formed by printing of specified consumables.
The specified printing consumables are preferably support ink or white ink.
In another embodiment of the present invention, after the S4, the method further includes:
s5: constructing image dot matrix data; the constructing of the image lattice data comprises: and carrying out halftone processing on the layer sheet with the determined color information of the second pixel point to obtain first image dot matrix data.
Specifically, the color information of each pixel point on the layer sheet is determined through the processing of S1-S4, so that the halftone processing can be performed to convert the color information into a file format recognizable by the printing device. Specifically, the halftone processing is also called screening processing. The screening processing can adopt the existing screening processing technologies such as amplitude modulation Screening (SAM), frequency modulation Screening (SFM), high fidelity true color screening technology and the like, and the scheme of the screening processing is not particularly limited.
Taking a 2-bit halftone process as an example, the first image dot matrix data includes dot data 00, dot data 01, dot data 10, and dot data 11 after the halftone process. Wherein the dot data 00 is used to characterize the corresponding nozzle as not ejecting ink; dot data 01 is used to characterize the corresponding nozzle ejecting a small amount of ink (e.g., 25% of the single maximum amount of ink ejected); the dot data 10 is used to characterize the amount of ink in a corresponding nozzle firing (e.g., 50% of a single maximum ink ejection); dot data 11 is used to characterize the corresponding nozzle ejecting a large amount of ink (e.g., 100% of a single maximum ink ejection amount).
In another embodiment of the present invention, after the S5, the method further includes:
s6: executing printing; the performing printing includes: and executing printing according to the first image dot matrix data.
And when the three-dimensional printing is specifically carried out, continuous overlapped printing is carried out from the bottom to the top according to the specific position of the original three-dimensional model of the layer sheet corresponding to the first image dot matrix data, and then the three-dimensional object manufacturing can be completed. For a part of the three-dimensional model, a supporting ink is also required, and since the use of the supporting ink is in the prior art, it is not too much to be said here.
In another embodiment of the present invention, in S5, the constructing the image lattice data further includes: judging whether the color processing width is larger than or equal to a set value, if so, performing reverse processing on the first image dot matrix data to obtain second image dot matrix data;
in the S6, the performing printing further includes: and executing printing according to the second image dot matrix data by using specified consumables.
Specifically, whether the color processing width is larger than or equal to a set value is judged, and if yes, the first image dot matrix data is subjected to reverse processing to obtain second image dot matrix data. In a preferred embodiment of the present invention, the setting value is preferably 5 pixels. Specifically, through a large number of tests, when the color processing width is greater than or equal to 5 pixel points, the color on the outer surface of the three-dimensional model begins to appear to be deformed, so that printing is executed by using a designated consumable according to the second image dot matrix data, the structural strength of the three-dimensional model can be improved, and the color deformation is avoided.
The embodiment of the invention provides at least 2 technical schemes for reverse processing. The first technical scheme is as follows: and traversing each point data in the first image dot matrix data, modifying the ink discharge data into non-ink discharge data (namely dot data 00) if the data is ink discharge data (namely dot data 01, dot data 10 and dot data 11), and modifying the data into ink discharge data if the data is non-ink discharge data. When the non-discharge data is modified to the discharge data, it may be modified to any one of the dot data 01, the dot data 10, and the dot data 11.
The second technical scheme is as follows: traversing each point data in the first image dot matrix data, and modifying the data into point data 11 if the data is the point data 00; if the data is point data 01, the data is modified into point data 10; if the data is point data 10, modifying the data into point data 01; if it is point data 11, it is modified to point data 00.
And obtaining second image dot matrix data after the reverse processing. Therefore, when printing is performed, printing is performed based on the first image dot matrix data and the second image dot matrix data. Preferably, the printing is executed according to the second image dot matrix data and the designated consumable item, and then the printing is executed according to the first image dot matrix data. Wherein the specified consumable is preferably white ink. The appointed consumables are sprayed firstly, and then printing is carried out according to the first image dot matrix data, so that the appointed consumables can be prevented from covering color ink to influence the printing effect.
In a preferred embodiment of the present invention, S2 includes:
s21: acquiring a preset layer height; wherein the preset layer height is less than or equal to the maximum stackable layer height when one-time scanning printing is performed.
S22: and slicing the three-dimensional model according to the preset layer height, so that the layer height of the obtained layer sheet is not greater than the preset layer height.
Specifically, in one embodiment of the present invention, when all the heads eject ink according to the maximum ink discharge amount in accordance with the printing apparatus, one-time scanning printing of the stackable maximum ink layer height as the preset layer height is performed. By adopting the technical scheme, the printing efficiency can be maximized.
In another embodiment of the present invention, the preset layer height may also be set to be smaller, for example, 10% of the maximum stackable ink layer height is printed by performing one scan, so that the printed three-dimensional object is finer.
In order to achieve both the printing quality and efficiency, the present invention further provides another method for performing slicing, specifically, in step S2 of the foregoing embodiment, the method further includes:
judging whether the color type included by the outer surface of the layer sheet is above a preset numerical value or not;
if yes, slicing the layer slices to obtain a plurality of secondary layer slices, wherein the height of each secondary layer slice is smaller than that of each layer slice.
Specifically, the more the types of colors on the outer surface of the sheet, the more complicated the color information. Therefore, the three-dimensional model can be sliced twice, and the three-dimensional model can be superposed by scanning and printing more times, so that the printed model is finer and smoother, and the effect is better. For example, the preset value is 5, and when the slicing is performed at S2, the preset layer height is the maximum ink layer height stackable by performing one-time scanning printing. If the color type of a certain layer is detected to be more than or equal to 5, performing secondary slicing on the layer to obtain a plurality of secondary layer layers, wherein the layer height of the secondary layer layers is less than the preset layer height, for example 10% of the maximum stackable ink layer height when performing one-time scanning printing.
In another implementation, in step S2 of the foregoing embodiment, the method further includes:
judging whether the color change gradient of the layer sheet is above a preset value;
if yes, slicing the layer slices to obtain a plurality of secondary layer slices, wherein the height of each secondary layer slice is smaller than that of each layer slice.
Specifically, the larger the gradient of color change of the layer sheet, the more complicated the color information thereof. Therefore, the three-dimensional model can be sliced twice, and the three-dimensional model can be superposed by scanning and printing more times, so that the printed model is finer and smoother, and the effect is better. The color change gradient may be calculated by different algorithms, and the present invention is not particularly limited.
In many application scenarios, the color distribution of the three-dimensional model is not uniform. For example, the color information of the front side of the three-dimensional model is quite rich, while the color information of the back side is monotonous. If such a three-dimensional model is sliced at the same layer height, it is likely that the front side is not fine enough for color reduction due to the thicker slices, and the efficiency is lower for the back side that does not need higher color quality.
Therefore, the embodiment of the present invention further provides another slicing method, specifically, before step S2, the method further includes: and acquiring the direction with the maximum color change gradient in the three-dimensional model, and recording the direction as the slice direction.
In S2, the method includes: and slicing the three-dimensional model according to the slicing direction to obtain a plurality of slices.
The slicing processing of the three-dimensional model according to the slicing direction to obtain the plurality of slices means that a normal vector of the slice obtained through the slicing processing is parallel to the slicing direction.
In a preferred embodiment of the present invention, between S5 and S6, the method further comprises:
s51: and acquiring a first feathering template and a second feathering template, wherein the sum of the first feathering template and the second feathering template is a full 1 matrix.
S52: and performing feathering processing on the first image dot matrix data according to the first feathering template to obtain first sub-image dot matrix data.
S53: and performing feathering processing on the first image dot matrix data according to the second feathering template to obtain second sub-image dot matrix data.
Specifically, the first feathering template and the second feathering template are both matrices, the sizes (i.e., the number of rows and the number of columns) of the matrices are equal, and the sum of the first feathering template and the second feathering template is an all-1 matrix. For example, the first feathering template is
The second eclosion template is
Generally, the first and second feathering templates obtained are equal in matrix size to the first image dot matrix data. Wherein the feathering is a matrix AND operation, such as the first image lattice data being
Then the first sub-image lattice data obtained by subjecting the first image lattice data to feathering according to the first feathering template is
The second sub-image lattice data obtained by subjecting the first image lattice data to feathering according to the second feathering template is
When printing, the first sub-image dot matrix data and the second sub-image dot matrix data are used for respectively executing scanning printing once, so that the mechanical error of the printing equipment is diffused to 2 times of printing, the three-dimensional object obtained by printing is more exquisite, and the effect is better. It should be noted that, the embodiment of the present invention may perform feathering on the plurality of color channels in the first image dot matrix data, respectively.
Similarly, the second image dot matrix data may also be subjected to feathering, and the principle thereof is similar to that of the feathering performed on the first image dot matrix data, and is not described herein again.
Referring to fig. 8, a color processing apparatus for a three-dimensional model according to an embodiment of the present invention includes:
the three-dimensional model acquisition module is used for acquiring a three-dimensional model to be printed, and the outer surface of the three-dimensional model comprises at least two colors;
the slicing processing module is used for slicing the three-dimensional model to obtain a plurality of slices; the pixel points marked at the edge of the layer slice are first pixel points, and the pixel points marked in the layer slice are second pixel points;
the first pixel point color information determining module is used for acquiring the color information of the first pixel point;
the second pixel point color information determining module is used for determining the color information of the second pixel point; the determining the color information of the second pixel point includes: adjusting the color information of a first pixel point closest to a second pixel point to be used as the color information of the second pixel point; the consumable quantity represented by the color information of the second pixel points is smaller than that represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero.
In addition, the color processing method of the three-dimensional model according to the embodiment of the present invention may be implemented by a printing apparatus. Fig. 9 is a schematic diagram illustrating a hardware configuration of a printing apparatus according to an embodiment of the present invention.
The printing device may include a processor and a memory storing computer program instructions.
In particular, the processor may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits that may be configured to implement embodiments of the present invention.
The memory may include mass storage for data or instructions. By way of example, and not limitation, memory may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or Universal Serial Bus (USB) Drive or a combination of two or more of these. The memory may include removable or non-removable (or fixed) media, where appropriate. The memory may be internal or external to the data processing apparatus, where appropriate. In a particular embodiment, the memory is non-volatile solid-state memory. In a particular embodiment, the memory includes Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), electrically rewritable ROM (EAROM), or flash memory or a combination of two or more of these.
The processor reads and executes the computer program instructions stored in the memory to realize the color processing method of any one of the three-dimensional models in the above embodiments.
In one example, the printing device may also include a communication interface and a bus. As shown in fig. 9, the processor, the memory, and the communication interface are connected by a bus to complete communication therebetween.
The communication interface is mainly used for realizing communication among modules, devices, units and/or equipment in the embodiment of the invention.
The bus includes hardware, software, or both that couple the components of the printing device to one another. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. A bus may include one or more buses, where appropriate. Although specific buses have been described and shown in the embodiments of the invention, any suitable buses or interconnects are contemplated by the invention.
In addition, in combination with the color processing method of the three-dimensional model in the above embodiments, the embodiments of the present invention may be implemented by providing a computer-readable storage medium. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement a color processing method of any one of the three-dimensional models in the above embodiments.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A method of color processing a three-dimensional model, the method comprising:
s1: obtaining a three-dimensional model to be printed, wherein the outer surface of the three-dimensional model comprises at least two colors;
s2: slicing the three-dimensional model to obtain a plurality of laminas; the pixel points marked at the edge of the layer slice are first pixel points, and the pixel points marked in the layer slice are second pixel points;
s3: acquiring color information of the first pixel point;
s4: determining color information of a second pixel point; the determining the color information of the second pixel point includes: adjusting the color information of a first pixel point closest to a second pixel point to be used as the color information of the second pixel point; the consumable quantity represented by the color information of the second pixel points is smaller than that represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero.
2. The method according to claim 1, wherein in the S4, comprising:
s41: determining a normal vector of the first pixel point, wherein the normal vector is perpendicular to a tangent line of a layer slice of the first pixel point, and the normal vector points to the inside of the layer slice from the edge of the layer slice;
s42: and adjusting the color information of the first pixel point to be used as the color information of a second pixel point positioned in the normal vector direction of the first pixel point.
3. The method of claim 2, wherein for a second pixel located on the same normal vector, a linear distance between the second pixel and the first pixel corresponding to the normal vector is inversely related to the amount of consumable material represented by the color information of the second pixel.
4. The method according to any one of claims 1 to 3, wherein in the S4, comprising:
s401: acquiring a color processing width;
s402: determining a color processing region according to the edges of the ply and the color processing width; wherein the color treated region has an area less than an area of the ply, the color treated region including an edge of the ply;
s403: and determining the color information of a second pixel point positioned in the color processing area.
5. The method of claim 4, after the S4, further comprising:
s5: constructing image dot matrix data; the constructing of the image lattice data comprises: performing halftone processing on the layer sheet with the determined color information of the second pixel point to obtain first image dot matrix data;
s6: executing printing; the performing printing includes: and executing printing according to the first image dot matrix data.
6. The method according to claim 5, wherein in the S5, the constructing image lattice data further comprises: judging whether the color processing width is larger than or equal to a set value, if so, performing reverse processing on the first image dot matrix data to obtain second image dot matrix data;
in the S6, the performing printing further includes: and executing printing according to the second image dot matrix data by using specified consumables.
7. The method according to any one of claims 1-3, wherein the consumable quantity characterized by the color information of the second pixel is smaller than the consumable quantity characterized by the color information of the corresponding first pixel, comprising: the consumable quantity represented by at least one color channel in the second pixel point is less than the consumable quantity represented by the same color channel in the corresponding first pixel point; or the total material consumption represented by all the color channels in the second pixel point is less than the total material consumption represented by all the color channels in the corresponding first pixel point.
8. An apparatus for color processing of a three-dimensional model, the apparatus comprising:
the three-dimensional model acquisition module is used for acquiring a three-dimensional model to be printed, and the outer surface of the three-dimensional model comprises at least two colors;
the slicing processing module is used for slicing the three-dimensional model to obtain a plurality of slices; the pixel points marked at the edge of the layer slice are first pixel points, and the pixel points marked in the layer slice are second pixel points;
the first pixel point color information determining module is used for acquiring the color information of the first pixel point;
the second pixel point color information determining module is used for determining the color information of the second pixel point; the determining the color information of the second pixel point includes: adjusting the color information of a first pixel point closest to a second pixel point to be used as the color information of the second pixel point; the consumable quantity represented by the color information of the second pixel points is smaller than that represented by the color information of the corresponding first pixel points, and the consumable quantity represented by the color information of at least one second pixel point is not zero.
9. A printing apparatus, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory that, when executed by the processor, implement the method of any of claims 1-7.
10. A storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1-7.
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Address after: 518000 a201-a301, building a, Sino German European Industrial Demonstration Park, Hangcheng Avenue, guxing community, Xixiang street, Bao'an District, Shenzhen, Guangdong Patentee after: Shenzhen Hansen Software Co.,Ltd. Address before: 1701, 1703, building C6, Hengfeng Industrial City, 739 Zhoushi Road, Hezhou community, Hangcheng street, Bao'an District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN HOSONSOFT Co.,Ltd. |