JP3549730B2 - Image processing apparatus, recording medium storing image processing program, and drawing apparatus - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image processing apparatus that performs thickening or thinning processing of an image, a recording medium that stores an image processing program, and a drawing apparatus that uses them.
[0002]
[Prior art]
In order to make an image drawn by a drawing device such as a laser plotter thicker or thinner, thickening or thinning of the image is performed.
[0003]
FIG. 47 is a diagram illustrating an example of a conventional image thickening process. To make the image shown in FIG. 47A thicker by two pixels, as shown in FIG. 47B, white pixels in the vicinity of each of the four black pixels are converted into black pixels, and as shown in FIG. As shown, white pixels near eight of each black pixel are converted to black pixels . In this manner, the image composed of black pixels is enlarged by two pixels in the vertical and horizontal directions.
[0004]
To reduce the image by two pixels, conversely, black pixels in the vicinity of four of each white pixel are converted to white pixels, and black pixels in the vicinity of eight of each white pixel are converted to white pixels. Thereby, the image composed of black pixels is reduced by two pixels in the vertical and horizontal directions.
[0005]
[Problems to be solved by the invention]
In the conventional thickening and thinning processes described above, it is necessary to determine whether each pixel is a white pixel or a black pixel, and to convert the values of pixels in the vicinity of 4 or 8 one by one. In this case, it is necessary to convert run-length data indicating the number of consecutive pixels having the same value into bitmap data corresponding to the value of each pixel, and read out each bitmap data one by one. Therefore, the number of times data is read increases, and processing time is required. Further, the amount of increase or decrease in the vertical and horizontal directions cannot be independently controlled.
[0006]
SUMMARY OF THE INVENTION It is an object of the present invention to be able to rapidly reduce an image in at least one of two directions orthogonal to each other and to reduce or increase the thickness in the other direction, and to reduce the amount of reduction or increase in two directions. An object of the present invention is to provide an image processing device that can be controlled independently, a computer-readable recording medium that stores an image processing program, and a drawing device that uses the image processing device.
[0007]
Means for Solving the Problems and Effects of the Invention
(1) First Invention The image processing apparatus according to the first invention thins or thickens an image composed of a plurality of lines of pixel columns in a first direction along each line and orthogonally intersects each line. 2. An image processing apparatus for performing a process of narrowing in two directions, comprising: reading means for sequentially reading run-length data of a plurality of lines corresponding to a pixel column of a plurality of lines of an image as change point data representing a change point of a pixel value Processing means for performing a thinning or fattening process in the first direction on the changing point data of each line read by the reading means; and changing point data thinned or fattened by the processing means. and sequentially obtaining combining means changing point data of each line by synthesizing each number of a plurality of lines which is determined based on the thinning amount in the second direction, the change point data of each line obtained by the combining means It is obtained and output means for outputting the data as a run length.
[0008]
In the image processing apparatus according to the present invention, the run length data of a plurality of lines corresponding to the pixel columns of the plurality of lines of the image are sequentially read as change point data by the reading unit. The change point data processed while the thinning or fattening processing in the first direction is performed by the synthesizing means on the changing point data of each line read by the reading means, and the thinning in the second direction is performed. The number of lines determined on the basis of the shift amount is synthesized for each of the plurality of lines, and the change point data of each line is sequentially obtained. The change point data of each line obtained by the combining means is output as run length by the output means.
[0009]
In this case, the number of change point data is smaller than the number of pixels constituting the image, and thus the data reading time is reduced. Therefore, the image can Rukoto fast so causes thinning or thickening in the first direction thinned in the second direction.
[0010]
In addition, the image is thinned or thickened in the first direction by performing the thinning or thickening process in the first direction on the change point data of each line, and the change point data is synthesized by a plurality of lines. since thinning the image in the second direction makes it possible to control thinning amount in the first direction or thickening amount and the second in the direction thinning amounts independently.
[0011]
(2) Second invention An image processing apparatus according to a second invention is the image processing apparatus according to the first invention, wherein the processing means and the synthesizing means are tapered or fattened in a first direction. One line of change point data to be processed and combined from the number of lines one more than the amount of reduction in the second direction to the number of lines one more than twice the amount of reduction in the second direction After changing sequentially, the change point data to be subjected to the thinning or thickening process in the first direction and the combination are shifted by a predetermined number of lines one line at a time, and the thinning or thickening in the first direction is performed. One line of change point data to be processed and combined from one line more than twice the amount of thinning in the second direction to one line more than the amount of thinning in the second direction In order.
[0012]
In this case, the change point data to be subjected to thinning or thickening process and synthesis in a first direction from the thinning amount 1 large number of lines than in a second direction to a second direction fine By sequentially increasing the number of lines one by one up to the number of lines greater than twice the amount of squeezing, a thinning result on one side of the image is obtained. Further, by shifting the change point data to be subjected to the thinning or fattening process in the first direction and the synthesis by a predetermined number of lines one line at a time, a thinning result at the center of the image can be obtained. Further, the change point data to be subjected to the thickening process and the synthesis in the first direction is thinned in the second direction from the number of lines one more than twice the thinning amount in the second direction. By reducing one line at a time to one more line than the amount, a thinning result on the other side of the image is obtained.
[0013]
(3) Third invention In the image processing device according to the third invention, in the configuration of the image processing device according to the first or second invention, the reading means may include a plurality of lines at the time of narrowing in the second direction. The run length data of the minute is read as change point data corresponding to the inverted image, and the processing means reads each of the read data by the reading means at the time of narrowing in the second direction and narrowing in the first direction. The change point data of the line is subjected to thickening processing in the first direction, and the change point data of each line read by the reading means at the time of thinning in the second direction and thickening in the first direction. This is to perform a narrowing process in the first direction.
[0014]
At the time of thinning in the second direction, the reading unit reads the run-length data for a plurality of lines as change point data corresponding to the inverted image. In this case, at the time of thinning in the first direction, the synthesizing means performs a thickening process in the first direction on the changing point data of each line, and at the time of thickening in the first direction, the synthesizing means. The change point data of each line is subjected to a narrowing process in the first direction.
[0015]
(4) Fourth invention A computer-readable recording medium on which an image processing program according to the fourth invention is recorded is characterized in that an image composed of a plurality of lines of pixel rows is narrowed in a first direction along each line. a second computer readable recording medium recording an image processing program for executing processing of thinning in the direction to the computer that is orthogonal to the line along with the thickening, the image processing program, the pixel row of the plurality of lines of image a process of reading in the order as the change point data representing the change point of the pixel values of run-length data for a plurality of lines corresponding to the allowed thinning or thickening of the change point data of each line read in the first direction a process of performing, synthesized by the number of a plurality of lines which is determined based on the thinning of the change point data processed thereby thinning or thickening in the second direction Each and sequentially obtaining processing change point data of the line, and a process of outputting a change point data of each obtained line as the run-length data by the one in which is executed by a computer.
[0016]
According to the computer-readable recording medium on which the image processing program according to the present invention is recorded, run-length data of a plurality of lines corresponding to pixel lines of a plurality of lines of an image are sequentially read as change point data, and each of the read data is read. while thinning or thickening process in a first direction is performed in the change point data of the line, thinning or thickening processed change point data based on the thinning amount in the second direction The determined number of lines are synthesized, and the change point data of each line is obtained in order. The obtained change point data of each line is output as run-length data.
[0017]
In this case, the number of change point data is smaller than the number of pixels constituting the image, and thus the data reading time is reduced. Therefore, the image can Rukoto fast so causes thinning or thickening in the first direction thinned in the second direction.
[0018]
Also, the image is thinned or fattened in the first direction by performing the thinning or fattening process in the first direction on the changing point data of each line, and the changing point data is synthesized by a plurality of lines. , The image is narrowed in the second direction, so that the amount of thinning or thickening in the first direction and the amount of thinning in the second direction can be independently controlled.
[0019]
(5) Fifth Invention A drawing apparatus according to a fifth invention is a drawing apparatus that draws an object using a light beam, and turns on and off the light beam in a first scanning direction of the object. Light beam scanning means for scanning, a driving means for relatively moving the light beam scanning means and the object in a second scanning direction orthogonal to the first scanning direction, and an image comprising a plurality of lines of pixel rows. An image processing device that performs processing to reduce or increase the thickness in a first direction along each line and reduce the thickness in a second direction orthogonal to each line, and light based on data output from the image processing device. The image processing apparatus further includes: a beam scanning unit and a drawing control unit that controls a driving unit, wherein the image processing apparatus converts run-length data of a plurality of lines corresponding to a pixel column of a plurality of lines of an image as change point data representing a change point of a pixel value. Read in order And no reading means, processing means intends row processing was thinning or thickening in the first direction to the change point data of each line read by reading means, the change point data processed by the processing means second Combining means for sequentially obtaining the change point data of each line by combining a plurality of lines of a number determined based on the amount of reduction in the direction of, and running the change point data of each line obtained by the combining means. Output means for outputting as length data.
[0020]
In the drawing apparatus according to the present invention, the object is scanned in the first scanning direction while the light beam is turned on and off by the light beam scanning means. Further, the drive means moves the light beam scanning means and the object relatively in the second direction. In this case, the light beam scanning unit and the driving unit are controlled based on data output from the image processing device.
[0021]
In particular, in the drawing apparatus according to the present invention, the image processing apparatus can rapidly narrow or thicken the image in the first direction while narrowing the image in the second direction, and can reduce the image in the first direction. It is possible to independently control the amount of thinning or thickening and the amount of thinning in the second direction. Therefore, it is possible to draw an image on an object while narrowing or thickening the image in the first direction at a high speed, and to draw the image in the first direction. The thickening amount and the thinning amount in the second direction can be independently controlled.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram illustrating a configuration of an image processing apparatus according to an embodiment of the present invention.
[0023]
1, the image processing apparatus 1 includes an image data storage memory 11, a control operation unit 12, an auxiliary memory 13, and an external storage device 14. The control operation unit 12 includes a CPU (central processing unit).
[0024]
The external recording device 14 includes a recording medium such as a hard disk device or a floppy disk device, and stores an image processing program for performing a thickening process and a thinning / thickening process described later. The auxiliary memory 13 is used as a work area.
[0025]
An image input device 2, an image output device 3, a display device 4, and a pointing device 5 are connected to the image processing device 1. The image input device 2 is, for example, an image scanner, an input device for inputting CAD (Computer Aided Design) data, and the like. The image output device 3 is, for example, a drawing device described later. The display device 4 is, for example, a display, and the pointing device 5 is, for example, a mouse.
[0026]
Image data input from the image input device 2 is stored in the image data storage memory 11. The control operation unit 12 performs a later-described thickening process or thinning / thinning process on the image data stored in the image data storage memory 11 according to an image processing program stored in the external storage device 14. The output image data is output to the image output device 3 via the image data storage memory 11.
[0027]
The display device 4 displays an image corresponding to the image data input by the image input device 2, and displays an image corresponding to the image data processed by the control operation unit 12. The pointing device 5 is used to input various parameters relating to the fattening process and the thinning / thickening process.
[0028]
In this embodiment, the image data storage memory 11, the control operation unit 12 and the auxiliary memory 13 constitute a reading unit, the control operation unit 12 and the auxiliary memory 13 constitute a synthesizing unit, and the image data storage memory 11 and the control unit The calculation unit 12 forms an output unit.
[0029]
Hereinafter, the thickening process and the thinning / thickening process performed by the image processing apparatus of FIG. 1 will be described. In the following description, the horizontal direction (horizontal direction) of the image is defined as the x direction, and the vertical direction (vertical direction) of the image is defined as the y direction.
[0030]
The thickening process refers to a process of enlarging an image in the x direction and the y direction. The thinning / thickening process reduces the image in at least one of the x and y directions and reduces or expands the other direction. Refers to processing.
[0031]
For convenience of description, as shown in FIG. 2, an image of one line is represented by a symbol consisting of a circle and a straight line shown in FIG. 2B. The run-length data is data indicating a continuous number of pixels having the same value (white pixels or black pixels). The pixel value of a white pixel is, for example, “0”, and the pixel value of a black pixel is, for example, “1”. For example, in the example of FIG. 2A, since five white pixels are continuous, six black pixels are continuous, and seven white pixels are continuous, the run-length data is 5, 6, 7, and LF. LF represents a line feed. The change point data is data indicating a position (change point address) of a change point from a white pixel to a black pixel or from a black pixel to a white pixel. In the example of FIG. 2A, the change point data is 0, 5, 11, Max. Max represents a symbol corresponding to the line feed LF.
[0032]
Further, in the following description, as shown in FIG. 2B, white pixels are turned off, black pixels are turned on, and transition points from off to on and from on to off are represented by circles. ON pixels are represented by straight lines.
[0033]
FIG. 3 is a flowchart showing a condition setting process in the thickening process and the thinning / thickening process.
[0034]
First, a thickening or thinning amount Δx in the x direction and a thickening or thinning amount Δy in the y direction are input (step S1). Then, a data reading area for (2Δx + 1) lines corresponding to the thickening width in the x direction is secured in the auxiliary memory 13 (step S2).
[0035]
For example, when the amount of thickening or thinning Δx in the x direction is two pixels, a data reading area 100 for five lines is secured as shown in FIG. In FIG. 4, L1 to L5 indicate five lines of the data reading area 100. Max is written into this data reading area 100 as an initial value.
[0036]
The process proceeds to the thickening process described below when performing the thickening in both the x direction and the y direction, and proceeds to the thinning / thickening process described below when performing the thinning process in at least one of the x direction and the y direction. Proceed (step S3).
[0037]
(1) Thickening process In the thickening process, the image of each line is thickened in the y-direction based on the thickening shape table, and the change point data of a plurality of lines is merged, so that the image in the x-direction and the y-direction is obtained. Fat to both.
[0038]
FIG. 5 is a diagram illustrating a method of increasing the thickness in the y direction. In the thickening in the y direction, the thickening amount is subtracted from the odd-numbered change point data, and the thickened amount is added to the even-numbered change point data. If the subtraction result is negative, 0 is set. In addition, when the magnitude relationship between the two change point data is switched by subtraction or addition, or when the two change point data become equal, the two change point data are deleted.
[0039]
In the example of FIG. 5A, the change point data 0, 17, and Max are obtained by increasing the change point data 1, 5, 6, 9, 13, 15, and Max by two in the y direction. In the example shown in FIG. 5B, the change point data 1, 12, 13, 19, Max can be obtained by increasing the change point data 3, 10, 15, 17, Max by two in the y direction. In the example of FIG. 5C, the change point data 2, 11, 14, 18, and Max are obtained by increasing the change point data 3, 11, 15, 17, Max by one in the y direction.
[0040]
FIG. 6 is a diagram for explaining the merge process. In the merge processing, the change point data of two lines is combined with the change point data of one line. This merging process corresponds to performing a logical sum operation on pixels for two lines.
[0041]
In the example shown in FIG. 6A, the change point data 1, 5, 8, 10, 13, 16, Max and the change point data 1, 3, 12, 14, Max are merged to change point data 1, 5, 8, 10, 12, 16, Max are obtained. In the example of FIG. 6B, the change point data 1, 12, 13, 19, Max and the change point data 2, 12, 14, 18, Max are merged to obtain the change point data 1, 12, 13, 13, Max. 19. Max is obtained.
[0042]
7, 8 and 9 are flowcharts showing the fattening process.
First, a fattening shape table is created (Step S4 in FIG. 7). In this case, the merging process is performed so that the end of the image of one line subjected to the fattening process based on the input fattening amount Δx in the x direction and fattening amount Δy in the y direction has a shape close to a circle or an ellipse. Is set in the y direction. Specifically, a value of the fatness y in the range of the fattening width (2Δx + 1) in the x direction is calculated from an equation of a circle having the radius of the fattening amount Δy in the y direction.
[0043]
For example, as shown in FIG. 10 (a), when the fattening amount Δy = 2 in the y direction and the fattening amount Δx = 2 in the x direction, the equation of the circle is (x−2) ² + y ² = 4, A fattening shape table 101 shown in FIG. 10B is obtained. The range in the x direction of the thickened shape table 101 corresponds to the thickened width (2Δx + 1) in the x direction, and is 5 in this example.
[0044]
Next, run length data for (Δx + 1) lines is read into the data reading area 100 as change point data (step S5 in FIG. 7). Then, the merging process is performed while thickening the change point data in the data reading area 100 in the y direction (step S6). Thereafter, the change point data for one line obtained by the merge processing is output as run-length data (step S7).
[0045]
Further, the run length data for the next one line is read into the data reading area 100 as change point data (step S8 in FIG. 8). Then, the merging process is performed while changing the change point data in the data reading area 100 in the y direction (step S9). Thereafter, the change point data for one line obtained by the merge processing is output as run-length data (step S10). The processes in steps S8 to S10 are repeated until all the run length data is read into the data reading area 100 (step S11). Thereafter, the variable i is set to the x-direction thickening amount Δx (step S12).
[0046]
Next, the oldest one-line change point data in the data reading area 100 is erased (step S13). Then, the merging process is performed while changing the change point data in the data reading area 100 in the y direction (step S14). Thereafter, the change point data for one line obtained by the merge processing is output as run-length data (step S15), and 1 is subtracted from the variable i (step S16). The processes of steps S13 to S16 are repeated until the variable i becomes 0 (step S17).
[0047]
Next, a specific example of the fattening process will be described with reference to FIGS.
Here, it is assumed that the fattening process is performed on the run-length data shown in FIG. FIG. 11B shows an image corresponding to the run length data of FIG. 11A, and FIG. 11C shows change point data corresponding to the run length data of FIG. The thickening amount Δx in the x direction is 2, and the thickening amount Δy in the y direction is 2.
[0048]
In this case, as shown in FIG. 12, a data reading area 100 for storing run-length data for five lines is secured, and change point data Max is written as an initial value in each of the lines L1 to L5. First, the run length data of the first to third lines in FIG. 11 is read as change point data into the lines L1 to L3 of the data reading area 100.
[0049]
Next, as shown in FIG. 13A, the merge processing areas MS and MR are secured in the auxiliary memory 13, and the change point data Max is written at the head of the merge processing area MS as an initial value. In this case, the thickening amount y for the change point data of the data reading areas L1 to L5 is set to 2, 1, 0, 0, 1 based on the thickening shape table 101, respectively.
[0050]
First, the change point data Max of the line L1 in the data read area 100 is written in the merge processing area MR by making it thicker by two in the y direction, and the change point data Max of the merge processing area MS and the change point data Max of the merge processing area MR are compared. Merge processing is performed, and change point data Max, which is a processing result, is written in the merge processing area MS.
[0051]
Next, the change point data Max of the line L2 in the data read area 100 is written in the merge processing area MR with the thickness increased by one in the y direction, and the change point data Max of the merge processing area MS and the change point data Max of the merge processing area MR are written. Are merged, and the change point data Max, which is the processing result, is written in the merge processing area MS.
[0052]
Further, the change point data 3, 10, 15, 17, Max of the line L3 in the data read area 100 is written in the merge processing area MR with the thickness increased in the y direction by 0, and the change point data Max of the merge processing area MS and the merge processing area MR are written. The change point data 3,10,15,17, Max of the MR are merged, and the change point data 3,10,15, Max which is the processing result is written in the merge processing area MS.
[0053]
Similarly, the merging process is performed on the changing point data of the lines L4 and L5 in the data reading area 100, and the changing point data 3, 10, 15, 17, Max which is the final merge processing result is written in the processing result storage area M0. .
[0054]
As shown in FIG. 13B, the change point data 3, 10, 15, 17, Max of the processing result storage area M0 is output to the data output area M1 as run-length data 3, 7, 5, 2, LF. Note that the run length data is obtained by sequentially calculating the difference between each two pieces of change point data. FIG. 13C shows an image obtained by the merge processing.
[0055]
In this case, since the change point data has not been read into the lines L4 and L5 of the data reading area 100, the merge processing has been substantially performed on the change point data of three lines.
[0056]
As shown in FIG. 14A, the run-length data of the fourth line in FIG. 11 is read into the line L4 of the data reading area 100 as change point data. Also in this case, the change point data Max is written at the head of the merge processing area MS as an initial value. The fattening amount y for the change point data in the data reading areas L1 to L5 is set to 1, 2, 1, 0, 0, respectively.
[0057]
First, the change point data Max of the line L2 of the data reading area 100 is written in the merge processing area MR by making it thicker by two in the y direction, and the change point data Max of the merge processing area MS and the change point data Max of the merge processing area MR are written. Merge processing is performed, and change point data Max, which is a processing result, is written in the merge processing area MS.
[0058]
Next, the change point data 3, 10, 15, 17, Max of the line L3 in the data reading area 100 is increased by one in the y direction, and the obtained change point data 2, 11, 14, 18, Max is merged with the merge processing area. The data is written into the MR, the change point data Max in the merge processing area MS is merged with the change point data 2, 11, 14, 18, Max in the merge processing area MR, and the change point data 2, 11, 14, 14, 18. Write Max in the merge processing area MS.
[0059]
Further, the change point data 3, 11, 15, 17, Max of the line L4 in the data read area 100 is written to the merge processing area MR with the thickness increased by 0 in the y direction, and the change point data 2, 11, 14 in the merge processing area MS is written. , 18, Max and the change point data 3,11,15,17, Max of the merge processing area MR are merged, and the change point data 2,11,14,18, Max which is the processing result is stored in the merge processing area MS. Write.
[0060]
Merge processing is similarly performed on the change point data of the lines L5 and L1 in the data read area 100, and the change point data 2, 11, 14, 18, and Max, which are the final merge processing results, are written in the processing result storage area M0. .
[0061]
As shown in FIG. 14B, the change point data 2, 11, 14, 18, Max in the processing result storage area M0 is output to the data output area M1 as run-length data 2, 9, 3, 4, LF. FIG. 14C shows an image obtained by the merge processing.
[0062]
In this case, since the change point data has not been read into the line L5 of the data reading area 100, it means that the merge processing has been performed on the change point data for four lines.
[0063]
Next, as shown in FIG. 15A, the run-length data of the fifth line in FIG. 11 is read into the line L5 of the data reading area 100 as change point data, and the lines L3, L4, L5, L1, and L2 are read. Are performed in the order of and the merging process is performed, and change point data 1, 12, 13, 19, and Max, which are final merge results, are written in the process result storage area M0. Then, the change point data 1, 12, 13, 19, Max of the processing result storage area M0 is output to the data output area M1 as run-length data 1, 11, 1, 6, LF. FIG. 15B shows an image obtained by the merge processing.
[0064]
Further, as shown in FIG. 16A, the run length data of the sixth line in FIG. 11 is read into the line L1 of the data reading area 100 as change point data, and the lines L4, L5, L1, L2, and L3 are read. Thickening and merging in the y direction are sequentially performed, and change point data 1, 19, and Max, which are final merge results, are written in the processing result storage area M0. Then, the change point data 1, 19, and Max in the processing result storage area M0 are output to the data output area M1 as run-length data 1, 18, and LF. FIG. 16B shows an image obtained by the merge processing.
[0065]
Next, as shown in FIG. 17A, the run-length data of the seventh line in FIG. 12 is read as change point data into the line L2 of the data reading area 100, and the lines L5, L1, L2, L3, L4 Are performed in the order of and the merging process is performed, and change point data 1, 12, 13, 19, and Max, which are final merge results, are written in the process result storage area M0. Then, the change point data 1, 12, 13, 19, Max of the processing result storage area M0 is output to the data output area M1 as run-length data 1, 11, 1, 6, LF. FIG. 17B shows an image obtained by the merge processing.
[0066]
At this point, all run-length data has been read into the data reading area 100.
[0067]
Next, as shown in FIG. 18A, the change point data of the line L3 in the data reading area 100 is erased. The change point data is erased by writing the change point data Max. In this case, since the change point data Max has already been written in the line L3, the change point data does not change. The thickening and merging processing in the y direction is performed in the order of the lines L1, L2, L3, L4, and L5 in the data reading area 100, and the change point data 1, 11, 14, 18, and Max as the final merging result are processed. Write to the storage area M0. Then, the change point data 1, 11, 14, 18, and Max of the processing result storage area M0 are output to the data output area M1 as run-length data 1, 10, 3, 4, and LF. FIG. 18B shows an image obtained by the merge processing.
[0068]
In this case, since the change point data of the line L3 in the data reading area 100 has been deleted, the merge processing has been substantially performed on the change point data of four lines.
[0069]
Finally, as shown in FIG. 19A, the change point data of the line L4 in the data reading area 100 is erased, and the lines L2, L3, L4, L5, and L1 are thickened and merged in the y direction in the order. Then, the change point data 2, 9, 15, 17, Max, which is the final merge result, is written in the processing result storage area M0. Then, the change point data 2, 9, 15, 17, Max of the processing result storage area M0 is output to the data output area M1 as run-length data 2, 7, 6, 2, LF. FIG. 19B shows an image obtained by the merge processing.
[0070]
In this case, since the change point data of the lines L3 and L4 in the data reading area 100 has been deleted, the merge processing has been substantially performed on the change point data of three lines.
[0071]
In this way, the image shown in FIG. 20 (b) is obtained by subjecting the image shown in FIG. 20 (a) to thickening and merging in the y direction. In this fattening process, the processing result of the first line is obtained by the merging process using the first to third lines of the image, and the processing result of the second line is obtained by the merging process using the first to fourth lines. Then, the processing result of the third line is obtained by the merge processing using the first to fifth lines. The processing result of the fourth line is obtained by the merge processing using the second to sixth lines, and the processing result of the fifth line is obtained by the merge processing using the third to seventh lines. Further, the processing result of the sixth line is obtained by the merge processing using the fourth to seventh lines, and the processing result of the seventh line is obtained by the merge processing using the fifth to seventh lines.
[0072]
In the fattening process of this embodiment, the image can be fattened in the x direction and the y direction using the change point data, so that the processing speed is high. Further, the amount of thickening in the x direction and the y direction can be independently controlled.
[0073]
FIG. 21 is a flowchart showing the merging process of change point data for a plurality of lines. First, the line number n of the merge start position of the data reading area 100 is obtained (step S41). Then, the variable k is set to 0 (step S42). Next, change point data Max is written as an initial value at the head of the merge processing area MS (step S43).
[0074]
The change point data of the (n + k) th line in the data reading area 100 is thickened in the y direction and written into the merge processing area MR (step S44). Thereafter, a merge process is performed on the change point data of the merge processing area MS and the change point data of the merge processing area MR, the processing result is written in the merge processing area MS (step S45), and 1 is added to the variable k (step S46). ). Steps S44 to S46 are repeated until the variable k becomes equal to or greater than the fattening width (2Δx + 1) in the x direction.
[0075]
Note that the data read area 100 returns to the first line after the (2Δx + 1) th line. For example, in the example of FIG. 4, after the line L5 in the data reading area 100, the process returns to the line L1.
[0076]
FIG. 22, FIG. 23, and FIG. 24 are flowcharts showing the merging process of the change point data for two lines.
[0077]
In FIGS. 22 to 24, the A state flag indicates the on or off state of the image of one line, the B state flag indicates the on or off state of the image of the other line, and the merge state flag indicates the state of the merge processing. Shows the on or off state of the resulting image. A [nA] indicates the nA-th change point data in one line, and B [nB] indicates the nB-th change point data in the other line. Further, M [nm] indicates nm-th change point data obtained by the merge processing.
[0078]
First, the A state flag is turned off, the B state flag is turned off, the merge state flag is turned off, and nA = 0, nB = 0, and nm = 0 are set (step S51).
[0079]
First, the 0th change point data A [nA] of one line is compared with the 0th change point data B [nB] of the other line (step S52). When B [nB] ≧ A [nA], the A state flag is turned on (step S53), M [nm] is set to A [nA] (step S54), and 1 is added to nA (step S54). Step S55).
[0080]
On the other hand, if A [nA]> B [nB] in step S52, the B state flag is turned on (step S56), and M [nm] is set to B [nB] (step S57). 1 is added (step S58).
[0081]
Next, 1 is added to nm (step S59), and the nA-th change point data A [nA] of one line is compared with the nB-th change point data B [nB] of the other line (step S60). ).
[0082]
If B [nB] ≧ A [nA], the state of the A state flag is inverted (step S61). That is, when the A-state flag is on, it is turned off, and when the A-state flag is off, it is turned on.
[0083]
Next, it is determined whether the A state flag is different from the merge state flag and the A state flag is off (step S62). If the A state flag is different from the merge state flag and the A state flag is off, M [nm] is set to A [nA] (step S63).
[0084]
Next, it is determined whether or not the merge state flag is off and M [nm-1] matches M [nm] (step S64). That is, it is determined whether or not the image obtained by the merge processing is in an off state and the previous change point data obtained by the merge processing matches the current change point data. If the merge state flag is off and M [nm-1] and M [nm] match, 1 is subtracted from nm (step S65), and the merge state flag is inverted (step S66). If the merge state flag is on or M [nm-1] does not match M [nm], 1 is added to nm (step S67), and the merge state flag is inverted (step S68).
[0085]
Thereafter, 1 is added to nA (step S69), and the process returns to step S59. If the A state flag matches the merge processing flag or the A state flag is on in step S62, the process proceeds to step S69.
[0086]
If A [nA]> B [nB] in step S60 in FIG. 22, the B state flag is inverted (step S70 in FIG. 24). That is, when the B-state flag is on, it is turned off, and when the B-state flag is off, it is turned on.
[0087]
Next, it is determined whether the B state flag is different from the merge state flag and the B state flag is off (step S71). If the B state flag is different from the merge state flag and the B state flag is off, M [nm] is set to B [nB] (step S72).
[0088]
Next, it is determined whether or not the merge state flag is off and M [nm-1] matches M [nm] (step S73). That is, it is determined whether or not the image obtained by the merge processing is in an off state and the previous change point data obtained by the merge processing matches the current change point data. If the merge state flag is off and M [nm-1] and M [nm] match, 1 is subtracted from nm (step S74), and the merge state flag is inverted (step S75). If the merge state flag is on or M [nm-1] does not match M [nm], 1 is added to nm (step S76), and the merge state flag is inverted (step S77).
[0089]
Thereafter, 1 is added to nB (step S78), and the process returns to step S59. If the B state flag matches the merge state flag or the B state flag is on in step S71, the process proceeds to step S78.
[0090]
In this way, while comparing the change point data of the two lines in order from the beginning, the smaller one is stored based on the state of the merged change point data at that time.
[0091]
(2) Thinning / Thickening Processing In the thinning / thickening processing, the image of each line is thinned in the y direction and the image is thickened in the x direction by merging change point data of a plurality of lines. Alternatively, the image of each line is narrowed in the y-direction and the change point data of a plurality of lines is merged to reduce the image in the x-direction. The image is thinned in the x-direction by merging the change point data of.
[0092]
If the image is to be fattened in the x direction, the change point data corresponding to the original image is directly merged. When the image is reduced in the x direction, the on / off state of the original image is inverted, and the change point data corresponding to the inverted image is merged.
[0093]
FIG. 25 is a diagram showing a method of thinning or thickening in the y direction. When thinning in the y direction while increasing the thickness in the x direction, the thinning amount is added to the odd-numbered change point data, and the thinning amount is subtracted from the even-numbered change point data. If the magnitude relationship between the two change point data is switched by subtraction or addition, or if the two change point data become equal, the change point data is deleted.
[0094]
When thinning or thickening in the y direction while thinning in the x direction, 0 is inserted at the head of the change point data, and the on / off state of the image is reversed. In the thinning in the y direction, the inverted image is thickened in the y direction by subtracting the thinning amount from the odd-numbered changing point data and adding the thinning amount to the even-numbered changing point data. . In the thickening in the y direction, the inverted image is thinned in the y direction by adding the thickening amount to the odd-numbered change point data and subtracting the thickening amount from the even-numbered change point data.
[0095]
In the example shown in FIG. 25A, when the change point data 3, 11, 15, 17, Max is reduced by two in the y direction when the thickness is increased in the x direction, the change point data 5, 9, Max is obtained. . In the example of FIG. 25 (b), at the time of thinning in the x direction, 0 is inserted at the beginning of the change point data 3, 11, 15, 17, Max, so that the change point data 0 whose on and off are inverted is 0. , 3,11,15,17, Max. Then, by changing the obtained change point data by 2 in the y direction, change point data 0, 5, 9, Max are obtained. In this case, by inverting the change point data 0, 5, 9, Max again, an image obtained by narrowing the original image by two in the y direction can be obtained.
[0096]
FIG. 26 is a diagram for explaining the merging process. In the merge processing, the change point data of a plurality of lines is combined with the change point data of one line using the change point address and the change amount. This merging process corresponds to performing a logical sum operation on pixels for a plurality of lines.
[0097]
The change point address corresponds to the change point data of a plurality of lines, and the change amount indicates the number of the same change point data in the plurality of lines. This change amount is calculated by adding 1 to the change point data (the start position of the run length data) that changes from OFF to ON, and adding 1 to the change point data (the end position of the run length data) that changes from ON to OFF. Is obtained by subtracting
[0098]
In the example of FIG. 26, the change point data 1, 4, 5, and 8 are merged with the change point data 2, 4, 5, and 7, and the change point data 2 and 4 so that the change point data 1, 4, 5, and 8 is obtained. In this case, the change amounts are sequentially integrated from the top, the top change point address is set to change point data that changes from off to on, and the change point address where the integrated value of the change amount becomes 0 changes from on to off. The change point data is set, and the next change point address is set to the change point data that changes from off to on.
[0099]
27, 28 and 29 are flowcharts showing the thinning / thickening processing.
[0100]
First, two sets of change point address storage areas CP and change amount storage areas CC are secured in the auxiliary memory 13 of FIG. 1 (step S20). Next, run-length data for (Δx + 1) lines is read as change point data into the data reading area 100 while increasing or decreasing Δy in the y direction, and the change point address and the change amount storage area of the change point address storage area CP are read. The amount of change in CC is updated (step S21). Thereafter, one line of change point data is output as run-length data based on the change point address of the change point address storage area CP and the change amount of the change amount storage area CC (step S22).
[0101]
Thereafter, the run-length data of the next line is read as change point data into the data read area 100 while increasing or decreasing Δy in the y direction, and the change point address of the change point address storage area CP and the change of the change amount storage area CC are changed. The amount is updated (step S23 in FIG. 27). Then, one line of change point data is output as run-length data based on the change point address of the change point address storage area CP and the amount of change of the change amount storage area CC (step S24). Steps S23 and S24 are repeated until the change point data is read into all the lines in the data reading area 100.
[0102]
Next, the oldest one-line change point data in the data read area 100 is erased, and the change point address in the change point address storage area CP and the change amount in the change amount storage area CC are updated (step S26 in FIG. 28). . Then, the run-length data of the next one line is read into the data reading area 100 while making it thicker or narrower in the y direction by Δy as the change point data, and the change point address and the change amount storage area CC of the change point address storage area CP are read. Is updated (step S27). After that, one line of run-length data is output based on the change point address of the change point address storage area CP and the change amount of the change amount storage area CC (step S28). Steps S26 to S28 are repeated until all the run length data is read into the data reading area 100. After that, the variable i is set to the amount of thinning or thickening Δx in the x direction (step S30).
[0103]
Next, the oldest one-line change point data in the data read area 100 is erased, and the change point address in the change point address storage area CP and the change amount in the change amount storage area CC are updated (step S31 in FIG. 29). . Thereafter, one line of change point data is output as run-length data based on the change point address of the change point address storage area CP and the change amount of the change amount storage area CC (step S32), and 1 is subtracted from the variable i. (Step S33). Steps S31 to S33 are repeated until the variable i becomes 0.
[0104]
Next, a specific example of the thinning / thickening process will be described with reference to FIGS.
[0105]
Here, it is assumed that the run-length data shown in FIG. 30A is narrowed in the x direction and narrowed in the y direction. FIG. 30B shows an image corresponding to the run-length data of FIG. 30A, and FIG. 30C shows change point data corresponding to the run-length data of FIG. 30A. Further, the amount of contraction Δx in the x direction is 2, and the amount of contraction Δy in the y direction is 2.
[0106]
In the thinning in the x direction, as shown in FIG. 31A, the on and off states of the change point data are inverted by inserting 0 at the beginning of the change point data of each line. Thus, the on and off states of the image shown in FIG. 30B are inverted as shown in FIG.
[0107]
Further, as shown in FIG. 31 (c), the inverted change point data of FIG. 31 (a) is increased by two in the y direction. In the thickening in the y direction, the thickening amount is subtracted from the odd-numbered change point data, and the thickened amount is added to the even-numbered change point data. If the subtraction result is negative, 0 is set. When the magnitude relationship between the two change point data is switched by subtraction or addition, or when the two change point data become equal, the two change point data are deleted. As a result of the thickening in the y direction, an image shown in FIG. 31D is obtained.
[0108]
First, as shown in FIGS. 32 to 34, the run length data of the first to third lines in FIG. 30 are shown in FIG. 31 as the change point data in the lines L1, L2, and L3 of the data reading area 100. In this manner, the data is sequentially read while inverting and increasing the thickness by two in the y direction, and the even-numbered value of the change point data is made negative at the time of reading.
[0109]
At this time, the change point address of the change point address storage area CP and the change amount of the change amount storage area CC are updated. As a result, the change point data 0, -Max is stored in the line L1 of the data reading area 100, the change point data 0, -5, 8, -Max is stored in the line L2, and the change point data 0, -Max is stored in the line L3. 5,9, -Max is stored. The change point address of the change point address storage area CP is updated to 0, 5, 8, 9, Max, and the change amount of the change amount storage area CC is updated to 3, -2, 1, 1, -3. .
[0110]
At this point, one line of change point data is output as run-length data based on the change point address of the change point address storage area CP and the change amount of the change amount storage area CC. In this case, the amounts of change are integrated in order from the top, the first change point address, the change point address at which the integrated value becomes 0, and the next change point address are set as change point data, and the change point data inverted by inserting 0 is used. The change point data 0 at the head is erased to restore the original state. In the example of FIG. 34, the change point data is Max, and LF is output as run-length data.
[0111]
As shown in FIG. 35, the run-length data of the fourth line in FIG. 30 is read as a change point data into the line L4 of the data reading area 100 while inverting and thickening in the y direction by the method of FIG. The change point address of the address storage area CP and the change amount of the change amount storage area CC are updated. As a result, the change point address of the change point address storage area CP is updated to 0, 4, 5, 7, 8, 9, Max, and the change amount of the change amount storage area CC is 4, -1, -2, 1, 1,. It is updated to 1, 1, -4.
[0112]
The change amounts of the change amount storage area CC are integrated, and the first change point address 0 and the change point address Max at which the integrated value becomes 0 are set as change point data, and the first change point data 0 is deleted. Then, the change point data Max is output as run-length data LF.
[0113]
Next, as shown in FIG. 36, the run-length data of the fifth line of FIG. 30 is read into the line L5 of the data reading area 100 while being inverted and fattened in the y-direction by the method of FIG. , The change point address of the change point address storage area CP and the change amount of the change amount storage area CC are updated.
[0114]
Similarly, the change point address Max and the change point address Max where the integrated value of the change amount of the change amount storage area CC becomes 0 are set as the change point data, and the first change point data 0 is deleted. Then, the change point data Max is output as run-length data LF. At this point, data has been read into all the lines L1 to L5 of the data reading area 100.
[0115]
As shown in FIG. 37, the change point data 0, -Max of the line L1 in the data reading area 100 is erased, and the change point address of the change point address storage area CP and the change amount of the change amount storage area CC are updated. In this case, the change point address of the change point address storage area CP is updated to 0, 4, 5, 7, 8, 9, -Max, and the change amount of the change amount storage area CC is 4, -2, -2, 1 , 2, 1, -4.
[0116]
Then, as shown in FIG. 38, the run-length data of the sixth line in FIG. 30 is read into the line L1 of the data reading area 100 while being inverted and fattened in the y-direction by the method of FIG. , The change point address of the change point address storage area CP and the change amount of the change amount storage area CC are updated.
[0117]
Thereby, the change point address of the change point address storage area CP is updated to 0, 4, 5, 7, 8, 9, Max, and the change amount of the change amount storage area CC is 5, -3, -2, 1, 1,. Updated to 3, 1, -5. The first change point address 0, the change point address 5 where the integrated value of the change amount of the change amount storage area CC becomes 0, the next change point address 7 and the change point address Max where the integrated value becomes 0 are set as change point data. The first change point data 0 is deleted. Then, the change point data 5, 7, Max are output as run-length data 5, 2, LF.
[0118]
Next, as shown in FIG. 39, the change point data of the line L2 in the data read area 100 is erased, and the change point address of the change point address storage area CP and the change amount of the change amount storage area CC are updated. The run-length data of the seventh line 30 is read into the line L2 of the data read area 100 while being inverted and enlarged in the y-direction by the method of FIG. And the change amount of the change amount storage area CC is updated.
[0119]
Thereby, the change point address of the change point address storage area CP is updated to 0, 4, 5, 7, 8, 9, Max, and the change amount of the change amount storage area CC is 5, -3, -1, 1, 1,. It is updated to 2,1, -5. A change point address Max at which the integrated value of the change amount of the first change point address 0 and the change amount storage area CC becomes 0 is set as change point data, and the first change point data 0 is deleted. Then, the change point data Max is output as run-length data LF. At this point, all run-length data has been read into the data reading area 100.
[0120]
As shown in FIG. 40, the change point data of the line L3 in the data read area 100 is erased, and the change point address of the change point address storage area CP and the change amount of the change amount storage area CC are updated. Thus, the change point address of the change point address storage area CP is updated to 0, 4, 7, 8, Max, and the change amount of the change amount storage area CC is updated to 4, -3, 1, 2, -4. You. A change point address Max at which the integrated value of the change amount of the first change point address 0 and the change amount storage area CC becomes 0 is set as change point data, and the first change point data 0 is deleted. Then, the change point data Max is output as run-length data LF.
[0121]
Finally, as shown in FIG. 41, the change point data of the line L4 in the data read area 100 is erased, and the change point address of the change point address storage area CP and the change amount of the change amount storage area CC are updated. As a result, the change point address of the change point address storage area CP is updated to 0, 4, 8, Max, and the change amount of the change amount storage area CC is updated to 3, -2, 2, -3. A change point address Max at which the integrated value of the change amount of the first change point address 0 and the change amount storage area CC becomes 0 is set as change point data, and the first change point data 0 is deleted. Then, the change point data Max is output as run-length data LF. FIG. 42 shows an image obtained by the above-described thinning / thickening process.
[0122]
In this way, the image shown in FIG. 43 (b) is obtained by performing inversion, thickening in the y direction, merging, and inversion on the image shown in FIG. 43 (a). In the thinning / thickening process, the processing result of the first line is obtained by the merging process using the first to third lines of the image, and the processing result of the second line is obtained by the merging process using the first to fourth lines. The processing result is obtained, and the processing result of the third line is obtained by the merge processing using the first to fifth lines. The processing result of the fourth line is obtained by the merge processing using the second to sixth lines, and the processing result of the fifth line is obtained by the merge processing using the third to seventh lines. Further, the processing result of the sixth line is obtained by the merge processing using the fourth to seventh lines, and the processing result of the seventh line is obtained by the merge processing using the fifth to seventh lines.
[0123]
In the thinning / thickening process of the present embodiment, the image can be thinned in at least one of the x and y directions and thinned or thickened in the other direction by using the change point data. Higher processing speed. Also, the amount of thinning or thickening in the x and y directions can be controlled independently.
[0124]
FIG. 44 is a block diagram of a main part of a drawing apparatus using the image processing apparatus 1 of FIG. 1, and FIG. 45 is a schematic perspective view of the drawing apparatus of FIG.
[0125]
The drawing apparatus of FIG. 44 includes a scanning optical system 30 having a drawing head 31, a table 32, an X-axis drive motor 33, a Y-axis drive motor 34, and a drawing control device 35.
[0126]
The drawing head 31 of the scanning optical system 30 irradiates the photosensitive material 100 on the table 32 while scanning the laser beam with a predetermined scanning width in the X-axis direction (main scanning direction). As shown in FIG. 45, the table 32 is guided by a table guide 39 disposed on a base 38 so as to be movable in the Y-axis direction (sub-scanning direction). The table 32 is driven in the Y-axis direction by a Y-axis drive mode 32 (see FIG. 44).
[0127]
The scanning optical system 30 is guided by a head guide 40 above the table 32 so as to be movable in the X-axis direction (main scanning direction). The scanning optical system 30 is connected to an X-axis drive motor 33 via a ball screw 41, and is driven in the X-axis direction by the X-axis drive motor 33.
[0128]
The image processing device 1 shown in FIG. 1 is connected to the drawing control device 35 in FIG. 44, and the image input device 2 is connected to the image processing device 1. The image processing device 1 performs the above-described image processing on the image data input by the image input device 2, and outputs the processed image data to the drawing control device 35.
[0129]
The drawing control device 35 controls the scanning optical system 30, the X-axis drive motor 33, and the Y-axis drive motor 34 based on the image data given from the image processing device 1.
[0130]
In the drawing apparatus shown in FIG. 44, as shown in FIG. 46, the laser beam B is deflected while moving the photosensitive material 200 from the predetermined origin position at a substantially constant speed in the Y-axis direction (sub-scanning direction) so as to move in the X-axis direction. By scanning at a predetermined dot pitch in the (main scanning direction), drawing is performed on the surface of the photosensitive material 200 with a constant scanning width W.
[0131]
When the photosensitive material 200 moves to the end of the stroke, the photosensitive material 200 is returned to the origin side in the Y-axis direction, and the drawing head 31 is moved in the X-axis direction by a fixed distance. Thereafter, the photosensitive material 200 is moved in the Y-axis direction and the laser beam B is scanned in the X-axis direction.
[0132]
By repeating such an operation, exposure is sequentially performed for each strip-shaped region (stripe region) 201 on the photosensitive material 200, and finally, drawing is performed on the entire surface of the photosensitive material 200.
[0133]
In writing in each stripe area 201, a laser beam is scanned in the X-axis direction while being turned on or off for each dot on a scanning line based on image data, and a beam image is formed on the photosensitive material 200.
[0134]
In this embodiment, the scanning optical system 30 corresponds to a light beam scanning unit, the Y-axis driving motor 34 corresponds to a driving unit, the image processing apparatus 1 corresponds to an image processing apparatus, and the drawing control unit 35 corresponds to a drawing control unit. Is equivalent to
[0135]
In the above-described drawing apparatus, since the image processing apparatus 1 shown in FIG. 1 is used, drawing can be performed while thickening or thinning the image at high speed, and the amount of thickening or thinning is set to x It becomes possible to control independently in the direction and the y direction.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of an image processing apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of an image for one line, run-length data, and change point data.
FIG. 3 is a flowchart showing a condition setting process in the thickening process and the thinning / thickening process.
FIG. 4 is a diagram showing a data reading area.
FIG. 5 is a diagram for explaining a method of increasing the thickness in the y direction.
FIG. 6 is a diagram illustrating a merge process.
FIG. 7 is a flowchart illustrating a fattening process.
FIG. 8 is a flowchart illustrating a fattening process.
FIG. 9 is a flowchart illustrating a fattening process.
FIG. 10 is a diagram illustrating an example of a fattening shape table;
FIG. 11 is a diagram illustrating an example of run length data, a corresponding image, and change point data.
FIG. 12 is a diagram showing a data reading area in which three lines of change point data are read.
FIG. 13 is a diagram illustrating a specific example of a fattening process.
FIG. 14 is a diagram illustrating a specific example of a fattening process.
FIG. 15 is a diagram illustrating a specific example of a fattening process.
FIG. 16 is a diagram showing a specific example of a fattening process.
FIG. 17 is a diagram illustrating a specific example of a fattening process.
FIG. 18 is a diagram illustrating a specific example of a fattening process.
FIG. 19 is a diagram illustrating a specific example of a fattening process.
FIG. 20 is a diagram showing images before the fattening process and after the fattening process.
FIG. 21 is a flowchart showing merge processing of change point data for a plurality of lines.
FIG. 22 is a flowchart showing merge processing of change point data of two lines.
FIG. 23 is a flowchart showing merge processing of change point data of two lines.
FIG. 24 is a flowchart illustrating merge processing of change point data of two lines.
FIG. 25 is a diagram for explaining a thinning process in the y direction.
FIG. 26 is a diagram illustrating a merge process.
FIG. 27 is a flowchart showing a thinning / thickening process.
FIG. 28 is a flowchart illustrating a thinning / thickening process.
FIG. 29 is a flowchart illustrating a thinning / thickening process.
FIG. 30 is a diagram illustrating an example of run length data, a corresponding image, and change point data.
FIG. 31 is a diagram showing inversion of change point data, corresponding images, thickening in the y direction, and corresponding images.
FIG. 32 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 33 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 34 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 35 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 36 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 37 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 38 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 39 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 40 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 41 is a diagram illustrating a specific example of a thinning / thickening process.
FIG. 42 is a diagram illustrating an image obtained by a thinning / thickening process.
FIG. 43 is a diagram showing an image before a thinning / thickening process and an image after a thinning / thickening process.
FIG. 44 is a block diagram of a main part of a drawing apparatus using the image processing apparatus of FIG. 1;
FIG. 45 is a schematic perspective view of the drawing apparatus of FIG. 44;
FIG. 46 is a perspective view showing drawing by the drawing apparatus of FIG. 44;
FIG. 47 is a diagram showing a conventional image thickening process.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 image processing device 2 image input device 3 image output device 11 image data storage memory 12 control operation unit 13 auxiliary memory 14 external storage device 30 scanning optical system 31 drawing head 32 table 33 X-axis drive motor 34 Y-axis drive motor 35 drawing Control device

Claims (5)

An image processing apparatus that performs a process of thinning or thickening an image formed of a plurality of lines of pixel rows in a first direction along each line and thinning in a second direction orthogonal to each line ,
Reading means for sequentially reading run-length data for a plurality of lines corresponding to pixel lines of a plurality of lines of the image as change point data representing a change point of a pixel value,
Processing means for performing a thinning or fattening process in the first direction on the change point data of each line read by the reading means ;
The change point data of each line is synthesized by combining a plurality of lines of a number determined based on the amount of thinning in the second direction, with the changing point data thinned or thickened by the processing means. A combining means for obtaining in order;
An output unit that outputs change point data of each line obtained by the combining unit as run-length data. Said processing means and said combining means, said first thinning or thickening thinning amount by remote one more line of the change point data to be processed and synthetic in the second direction in the direction After sequentially increasing the number of lines one by one from the number to the number of lines that is one more than twice the amount of thinning in the second direction, the thinning or fattening process in the first direction and the object of synthesis Is shifted a predetermined number of times by one line, and the change point data to be subjected to the thinning or fattening process and the synthesis in the first direction is calculated as the amount of thinning in the second direction. the image processing apparatus according to claim 1, wherein the reducing in order and line-by-line until the number one more line than the thinning amount in the second direction from one more line numbers than twice. It said reading means reads the change point data corresponding to the inverted image run-length data of said plurality of lines when not thinned in the second direction,
The processing means includes : changing the change point data of each line read by the reading means at the time of narrowing in the second direction and narrowing in the first direction to thickening in the first direction; Performing a thinning process in the first direction on the change point data of each line read by the reading means at the time of thinning in the second direction and widening in the first direction. 3. The image processing apparatus according to claim 1, wherein the image processing is performed. An image processing program for causing a computer to execute a process of thinning or thickening an image formed of a plurality of lines of pixel rows in a first direction along each line and thinning in a second direction orthogonal to each line is recorded. Computer-readable recording medium,
The image processing program includes:
A process of sequentially reading run-length data for a plurality of lines corresponding to pixel lines of a plurality of lines of the image as change point data representing a change point of a pixel value;
A process of performing was thinning or thickening in the first direction to the change point data of each line in which the read,
A process of sequentially obtaining the change point data of each line by synthesizing the thinned or thickened change point data by a plurality of lines determined based on the thinning amount in the second direction ; ,
Outputting a change point data of each of the obtained lines as run-length data to a computer. A drawing apparatus for drawing on an object using a light beam,
Light beam scanning means for scanning the object in a first scanning direction while turning on and off the light beam;
Driving means for relatively moving the light beam scanning means and the object in a second scanning direction orthogonal to the first scanning direction;
An image processing apparatus that performs processing of thinning or thickening an image formed of a plurality of pixel columns in a first direction along each line and thinning in a second direction orthogonal to each line ;
Drawing control means for controlling the light beam scanning means and the driving means based on data output from the image processing apparatus,
The image processing device includes:
Reading means for sequentially reading run-length data for a plurality of lines corresponding to pixel lines of a plurality of lines of the image as change point data representing a change point of a pixel value,
Processing means intends the thinning or row processing thickening in a first direction to the change point data of each line read by said reading means,
Synthesizing means for sequentially obtaining change point data of each line by synthesizing the change point data processed by the processing means for each of a plurality of lines determined based on the amount of reduction in the second direction ,
An output unit for outputting change point data of each line obtained by the combining unit as run-length data.

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