JP4097101B2 - Raster image processor - Google Patents

Description

[0001]
[Industrial application fields]
The present invention provides a raster image for creating a binary bitmap hairline pattern for embossing a decorative sheet having a pattern such as a wood grain pattern to express a glossy pattern called “shine”. Regarding the processor.
[0002]
[Prior art and problems to be solved by the invention]
For decorative sheets used for surface decoration of building materials such as wallpaper and flooring, and furniture surface decoration, a number of hairline patterns are embossed directly on the decorative sheet to express a glossy pattern called shine. Or, embossing a hairline pattern on a transparent sheet to create an embossed sheet, and attaching the embossed sheet to a decorative sheet on which a pattern such as a wood grain pattern is printed is widely used.
[0003]
Various methods for creating such a hairline pattern are known, and the applicant has also proposed various methods. However, as a data format for drawing a hairline pattern, a method for drawing each hairline pattern is described. Data may be given in the form of a vector consisting of a coordinate value sequence of a plurality of control points for forming a spline curve.
[0004]
When the hairline pattern data is given in the vector format as described above, each hairline pattern is drawn with a spline curve formed based on the coordinate value sequence of control points given to each hairline pattern. Will be. For example, now, data for drawing a certain hairline pattern consists of five control points, and the coordinate values of these control points are (x ₁ , y ₁ ), (x ₂ , y ₂ ), If (x ₃ , y ₃ ), (x ₄ , y ₄ ), (x ₅ , y ₅ ), a spline curve is drawn based on the coordinate values of these control points as shown in FIG. It is. In FIG. 7, P ₁ , P ₂ , P ₃ , P ₄ , and P ₅ indicate _five given control points, and their coordinate values are (x ₁ , y ₁ ), (x ₂ , y ₂ ), (x ₃ , y ₃ ), (x ₄ , y ₄ ), (x ₅ , y ₅ ), and M represents a spline curve drawn based on these five control points. Show.
[0005]
By the way, a certain line width is required for the hairline pattern. Therefore, as described above, when drawing a spline curve based on the coordinate value sequence of a given control point, a desired line width is set, and drawing is performed based on the coordinate value of the control point as shown in FIG. The desired line width is given to the spline curve. In addition, the hairline pattern shown in FIG. 8 has shown the case where the line | wire width set to the spline curve M shown in FIG. 7 is attached.
[0006]
However, as shown in FIG. 8, when the line width of the hairline pattern is constant, an embossed plate is created with such a hairline pattern, and a decorative sheet or the like is embossed with the embossed plate. It has been confirmed that there is a problem that sharp reflection occurs at both ends of the hairline pattern shown in FIG. 1, which is undesirable as an embossed product.
[0007]
Furthermore, in order to create a binary hairline pattern in a two-dimensional bitmap format, a huge memory capacity is required to draw the hairline pattern, and a vast two-dimensional area due to the limitation of the memory capacity. There is also a problem that the hairline pattern cannot be drawn.
[0008]
That is, it is not uncommon for a hairline pattern for producing an embossed plate to have a size of about 1 m × 1 m, and a resolution of about 100 pixels per mm is required. And it is required to draw several hundred thousand to one million hairline patterns in such a two-dimensional region.
[0009]
Therefore, the drawing of the hairline pattern can be performed only by a specially prepared apparatus having a huge memory capacity that satisfies the above-described conditions.
[0010]
Therefore, an object of the present invention is to prevent sharp reflection from occurring at both ends of a hairline pattern when drawing a hairline pattern from hairline data given in vector format.
It is another object of the present invention to draw a hairline pattern of a desired size even with a small memory capacity.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a raster image processor according to claim 1 is a binary bitmap based on hairline data provided in a vector format comprising a coordinate value sequence of control points for drawing a predetermined curve. Raster image processor for drawing a hairline pattern in a format, comprising at least a region dividing device for dividing an output image into regions and a raster drawing device for drawing a binary bitmap hairline pattern based on hairline data The apparatus compares a preset output image size with a memory size used by the raster drawing apparatus, and the raster drawing apparatus uses a binary bitmap format at a resolution in which a hairline pattern is set within each divided region. The output image is divided into areas that can be drawn with Divided for each area by location, characterized by drawing a bitmap hairline pattern binary based on the coordinate value row of control points given by hairline data.
[0012]
The raster image processor according to claim 2 is the raster image processor according to claim 1, wherein when the raster drawing apparatus draws a binary bitmap hairline pattern, a function given in advance to the hairline pattern is provided. The line width is given based on the above.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of a raster image processor according to the present invention. In the figure, 1 is a parameter input device, 2 is a hairline data input device, 3 is a bounding box arithmetic device, 4 is an area dividing device, 5 Indicates a raster drawing device, and 6 indicates an image output device.
[0014]
The parameter input device 1 inputs predetermined parameters. Here, as parameters, information for determining the output image size, resolution, and hairline line width is input. Here, various forms are conceivable as information for determining the line width of the hairline. Here, a function H for determining the line width with respect to the normalized position q (0 ≦ q ≦ 1) in the y direction. (Q) shall be input. An example is shown in FIG. The function H (q) shown in FIG. 2A is a part of a quadratic curve, but it is naturally possible to input an arbitrary function. When q = 0 and q = 1, the line width is 0. That is, H (0) = H (1) = 0. This is because when H (0) ≠ 0 and H (1) ≠ 0, sharp reflection occurs at both ends of the hairline pattern as described above. Note that the unit of the line width may be given by the number of pixels.
[0015]
The process of adding a line width to the hairline pattern using the function H (q) that determines the line width is performed as follows. Now, assuming that the hairline pattern to be subjected to the process of adding a line width is indicated by M _i in FIG. 2B, the position in the y direction of this hairline pattern M _i as shown in FIG. And the position of the function H (q) are made to correspond one-to-one. When the position indicated by p of the hairline M _i is corresponds to the position indicated by the q function H (q), the function value at this position is assumed to be H (q), for example, of the hairline pattern A line width is added to each side of the position of p by the function value H (q). As a result, a line width can be given to each position of each hairline pattern, and a hairline pattern in which the line width is small at both ends and the line width is wider at the center portion can be drawn.
[0016]
The hairline data input device 2 is a device for inputting the vector-style hairline data described above. This hairline data can be stored in an appropriate storage medium. A serial number is assigned to each hairline data.
[0017]
The bounding box calculation device 3 is a device that obtains a bounding box for each hairline data. The bounding box calculates, for each hairline, the maximum and minimum values in the x direction and the minimum and maximum values in the y direction of the spline curve when a spline curve is drawn based on the coordinate value sequence of control points. Ask for. That is, the circumscribed rectangle of the spline curve is obtained. For example, if a hairline is composed of five control points and a spline curve is drawn based on the coordinate values of those control points as shown in S of FIG. The circumscribed rectangle as shown by BB in the figure is obtained, and the maximum value and minimum value in the x direction and the minimum value and maximum value in the y direction are obtained. However, the maximum value of the function H (q) is added to the maximum value of the bounding box and subtracted from the minimum value of the bounding box in consideration of the line width of the generated hairline in the x direction.
[0018]
The region dividing device 4 appropriately divides the region of the output image according to the output image size input by the parameter input device 1 and the memory capacity used by the raster drawing device 5. The dividing direction may be divided in the y direction as shown in FIG. 4 (a), or may be divided in the x direction as shown in FIG. 4 (b), as shown in FIG. 4 (c). It is also possible to divide in the x direction and the y direction. As shown in FIG. 4A, when dividing in the y direction, the bounding box calculation device 3 obtains the minimum value and the maximum value in the x direction of the spline curve drawn based on the coordinate value sequence of the control points. There is no need to obtain the minimum and maximum values in the y direction. 4B, when dividing in the x direction, the bounding box calculation device 3 obtains the minimum value and the maximum value in the y direction of the spline curve drawn based on the coordinate value sequence of the control points. There is no need to obtain the minimum value and the maximum value in the x direction. However, when divided as shown in FIG. 4C, the bounding box computing device 3 uses the minimum and maximum values in the x direction and the y direction of the spline curve drawn based on the coordinate value sequence of the control points. It is necessary to find the minimum and maximum values of.
[0019]
The raster drawing device 5 draws a spline curve for each region divided by the region dividing device 4 based on the coordinate value sequence of control points given by the hairline data, and further inputs the spline curve with the parameter input device 1. This is a device that draws a binary bitmap hairline pattern by assigning a line width based on the function H (q) that determines the line width.
[0020]
The image output device 6 outputs and synthesizes a binary bitmap hairline pattern drawn by the raster drawing device 5 for each divided region, and is composed of a film output device, a printer, or the like.
[0021]
Next, the operation and processing will be described with reference to FIG. FIG. 5 is a flowchart showing the overall processing flow.
[0022]
First, a function for determining the output image size, resolution, and hairline line width is input by the parameter input device 1 (step S1). When these parameters are input, the parameter input device 1 passes the output image size to the region dividing device 4 and passes the functions for determining the resolution and the line width of the hairline to the raster drawing device 5.
[0023]
Upon receiving the output image size, the area dividing device 4 compares the output image size with the memory size used by the raster drawing device 5 and divides the output image size. The size of each divided region is set to a size that allows the raster drawing device 5 to draw a hairline pattern in the binary bitmap format at the input resolution within the range of each divided region. It is natural. Here, it is assumed that the image is divided in the y direction as shown in FIG.
[0024]
When the output image size is divided, the area dividing device 4 passes information on the divided areas such as the number of divided areas and the coordinate values of each divided area to the raster drawing apparatus 5. Then, the raster drawing device 5 takes in the information (step S2).
[0025]
Next, hairline data is taken in from the hairline data input device 2 (step S3). For example, when hairline data is stored in a storage medium such as a magneto-optical disk, the storage medium storing the hairline data may be set and read. Here, the total number of hairlines is n.
[0026]
When the hairline data is input, the bounding box calculation device 3 calculates the bounding box for each hairline data. The calculation of the bounding box is as described above. In this case, since the area division is performed in the y direction, the bounding box calculation device 3 uses the coordinates of the control points of the data of each hairline as described above. What is necessary is just to obtain | require the minimum value and maximum value of the y direction of the spline curve drawn based on the value sequence, ie, the coordinate value of the control point of the both ends of each hairline data.
[0027]
When the bounding box calculation device 3 calculates the bounding box based on the data of each hairline, the result is added to the data of each hairline and passed to the raster drawing device 5. Then, the raster drawing device 5 takes it in (step S4).
[0028]
The raster drawing device 5 determines information on the divided regions from the region dividing device 4, the hairline data to which the bounding box data from the bounding box arithmetic device 3 is attached, the resolution from the parameter input device 1, and the line width of the hairline. When the function H (q) is received, the processes in steps S5 to S11 are executed for each divided region.
[0029]
First, for the first divided region, i = 1 is set (step S5), and the data of the first hairline is read (step S6). Then, with reference to the bounding box of the data of the first hairline, it is determined whether or not the bounding box of the first hairline is within the range of the first divided region (step S7). In the determination process in step S7, if any part of the bounding box of the data of the hairline is within the range of the divided area, it is determined YES.
[0030]
If NO in step S7, the process branches, i = i + 1 (step S9), and steps S6 to S9 are repeated until YES is determined in step S10.
[0031]
If the determination in step 17 is YES, the hairline pattern is drawn on the bitmap based on the data of the hairline (step S8), then i = i + 1 is set (step S9), and steps S6 to S6 are performed. The process of S9 is repeated until YES is determined in the determination process of step S10. That is, steps S6 to S10 are repeated for all hairline data.
[0032]
The drawing process of the hairline pattern in step S8 is as follows.
As shown in FIG. 6A, when the bounding box BB of the hairline data that is currently drawn is all included in the range of the divided region where the hairline pattern is currently drawn, The raster drawing device 5 draws a spline curve based on the coordinate value of the control point of the data of the hairline, and as described above, the function H (q) that determines the line width for each position of the spline curve. A hairline pattern is drawn by adding a line width based on.
[0033]
However, as shown in FIG. 6B, when the bounding box BB of the data of the hairline that is currently drawn is out of the range of the divided region where the hairline pattern is currently drawn, the raster drawing device 5 temporarily generates a spline curve based on the coordinate value sequence of the control points of the data of the hairline, and further assigns a line width to the spline curve based on the function H (q) to virtually generate the hairline pattern. Generate and draw only the portion of the hairline pattern that falls within the range of the divided area. Thus, in the case shown in FIG. 6B, only the part indicated by a in the figure is drawn in the divided area, but the remaining part indicated by b in the figure is drawn in the next divided area. . As described above, the raster drawing device 5 draws the hairline pattern.
[0034]
When the processing of steps S6 to S10 is completed for all the hairline data, the raster drawing device 5 displays the binary bitmap hairline pattern drawn for the divided area, and the divided areas where these hairline patterns are drawn. The position information is passed to the image output device 6. As a result, the image output device 6 draws the binary bitmap hairline pattern passed from the raster drawing device 5 in an area corresponding to the position of the divided region passed from the raster drawing device 5 (step S11). . Then, when the drawing of the hairline pattern in the divided region is completed, the image output device 6 waits for the hairline pattern for the next divided region to be output from the raster drawing device 5. For example, if the image output device 6 has drawn the hairline pattern of the divided area indicated by R ₁ in FIG. 4A, the operation is temporarily stopped at the position where the drawing is finished, and then the raster drawing device 5 it is to wait for the hairline pattern divided regions shown in the diagram R ₂ are output. Then, when the hairline pattern of the divided region indicated by R ₂ in FIG. 4A is passed from the raster drawing device 5 later, the image output device 6 continues to the divided region R ₁ without a gap and the hairline pattern of the divided region R ₂ . Is output. The same applies hereinafter.
[0035]
The above steps S5 to S11 are executed for all the divided areas. As a result, the image output device 6 outputs an image in which n hairline patterns are drawn in the output image size input in step S1.
[0036]
In the above description, the area dividing device 4 is divided in the y direction as shown in FIG. 4A, but when divided in the x direction as shown in FIG. 4B, or FIG. The same applies to the case of division in the x direction and the y direction as shown in FIG.
[0037]
As described above, according to this raster image processor, it is possible not only to prevent sharp reflections at both ends of the hairline pattern as in the past, but also to draw the hairline pattern by dividing the output image size. Therefore, even when the memory capacity that can be used by the raster drawing device 5 is small, a hairline pattern can be drawn in a vast two-dimensional area, which is useful in building material printing.
[0038]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the flowchart shown in FIG. 5, hairline data is read one by one, and it is determined whether or not the read hairline data is included in the divided region where the hairline pattern is currently drawn. When the region is divided in the y direction as shown in FIG. 4A, for example, if the bounding box is sorted by the minimum value in the y direction, the current hairline pattern is included in the divided region to be drawn. The hairline data can be easily extracted. In this case, the maximum value of the bounding box of the extracted hairline data in the divided area is deleted after the hairline pattern is drawn, and the maximum value of the bounding box protrudes from the divided area. For the object, a portion within the range of the divided area may be drawn, and the data of the hairline may be left for drawing in the next divided area.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a raster image processor according to the present invention.
FIG. 2 is a diagram for explaining a method for adding a line width to a spline curve drawn based on vector-style hairline data;
FIG. 3 is a diagram for explaining computation for obtaining a bounding box in the bounding box computation device 3;
FIG. 4 is a diagram for explaining region division in the region dividing device 4;
FIG. 5 is a flowchart showing an overall processing flow in the raster image processor according to the present invention.
6 is a diagram for explaining a hairline pattern drawing process in step S8 of FIG. 5; FIG.
FIG. 7 is a diagram for explaining a method of creating a hairline pattern from hairline data given in a vector format.
FIG. 8 is a diagram for explaining a problem to be solved by the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Parameter input device, 2 ... Hairline data input device, 3 ... Bounding box arithmetic device, 4 ... Area dividing device, 5 ... Raster drawing device, 6 ... Image output device

Claims (2)

In a raster image processor that draws a binary bitmap hairline pattern based on hairline data given in vector format consisting of a coordinate value sequence of control points for drawing a predetermined curve,
An area segmentation device for segmenting an output image;
A raster rendering device for rendering a binary bitmap hairline pattern based on hairline data;
Comprising at least
The area dividing device compares the preset output image size with the memory size used by the raster drawing device, and the raster drawing device uses binary bits at a resolution at which the hairline pattern is set within the range of each divided region. Divide the output image into areas that can be drawn in map format,
A raster image processor is characterized in that, for each region divided by the region dividing device, a binary bitmap hairline pattern is drawn based on a coordinate value sequence of control points given by hairline data. . 2. The raster image processor according to claim 1 , wherein when the raster drawing apparatus draws a binary bitmap hairline pattern, a line width is attached to the hairline pattern based on a predetermined function. .

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