JPH0728982A - Recording method for picture data - Google Patents

Abstract

PURPOSE:To provide the recording method of picture data for easily reproducing the same edited result with a less data capacity by a simple method. CONSTITUTION:The picture data of source pictures defined as the bit map data in the unit of line are turned to the compressed source picture data of the unit of line for which the coordinate values X of the attribute changed points of bits and appendant attributes Z in the attribute changed points are paired and the compressed source picture data are converted to edited picture data based on editing command data. Thereafter, the edited picture data are defined as recompressed picture data compressed by the compressed source picture data and the editing command data and the recompressed picture data are stored in an external storage device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of recording image data, and more particularly, to reading a desired area from a document read by an image input device, editing the color and pattern, and the like. The present invention relates to an image data recording method suitable for an image processing apparatus that outputs an image.

[0002]

2. Description of the Related Art An image of a black-and-white (monotone) original such as a line drawing read by an image input device such as a scanner is edited based on an editing instruction, such as a change in color and pattern, and the edited image is printed by a printer or the like. An image processing device designed to output to an external output device has been considered.

In this type of image processing apparatus, characters,
The original image such as a figure is read by an image input device such as a scanner and converted into bit line bitmap data corresponding to each dot of the image, and then the coordinate value of the attribute change point of the bit and the attribute change point. It is stored in the image memory as compressed original image data for each line with a pair of additional attributes in.

When performing editing such as color change in a desired designated range of the original image, the compression is performed based on desired edit command data input by an external input device such as a tablet and a light pen. The original image data is edited into edited image data.

Further, the edited image data edited on the basis of the edit command data is returned to bit map data by a desired restoring means and outputted to an external output device such as a printer to obtain a desired print. There is.

Further, after the desired print is obtained, only the edit command data is stored in the external storage device such as the FD.

[0007]

However, in the image data recording method of storing only the above-mentioned conventional edit command data in the external storage device such as the FD, the capacity of the data to be stored can be reduced. When a plurality of prints are obtained using the same document, the document is read again by an image input device such as a scanner and the edit command data stored in an external storage device such as an FD is overlaid.
However, in this way, when reading an original with an image input device such as a scanner, even if the original is the same,
A slight misalignment occurs for each reading, and when this editing is performed using the stored edit data, the misalignment of the edited image data (the misalignment of the coordinate value (address) of the bit attribute change point) occurs. Occurrence does not result in the same edited image data as the edited image data when the edited command data is stored, and as a result, the same edited result (print) as the edited result (print) when the edited command data is stored is obtained. There was a problem that I could not do it. Then, such a problem occurs not only in the case of obtaining a plurality of prints described above, but also in the case of re-editing using the same document and the stored edit data.

In order to deal with such a problem, not only the editing data but all the data of the original image may be stored. However, storing all the data of the original image requires a large capacity and is expensive. However, there is a problem in that a large amount of time is required to store the data as well as an increase in the economic burden because the external storage device has to be applied.

The present invention has been made in view of these points, and overcomes the above-mentioned problems in the conventional ones.
An object of the present invention is to provide a recording method of image data that can easily reproduce the same editing result with a small data capacity by a simple method.

[0010]

In order to achieve the above-mentioned object, the image data recording method of the present invention is such that the image data of the original image, which is bit line bitmap data, is converted into the coordinate value of the bit attribute change point. And compressed original image data on a line unit basis with the incidental attribute at the attribute change point as a pair,
The compressed original image data is converted into edited image data based on the edit command data, and then the edited image data is recompressed image data compressed from the compressed original image data, and the edit command data and the recompressed image data are obtained. And are recorded in an external storage device.

[0011]

According to the image data recording method of the present invention having the above-described configuration, the image data of the original image is made into the recompressed image data having a small capacity, and the recompressed image data and the editing command data are stored in the external storage device. Since the same editing result can be easily reproduced with a small data capacity.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below along with its operation.

FIGS. 1 to 7 show an embodiment of an image data recording method according to the present invention, FIG. 1 is a flow chart, and FIG. 2 is a schematic diagram showing image data of an original image. 3 (a) to 3 (d) are schematic diagrams showing compressed original image data, FIG. 4 is a schematic diagram showing edit command data, and FIGS. 5 (a) and 5 (b) are edit images. FIG. 6 is a schematic diagram showing image data, FIG. 6 is a schematic diagram showing data in which an editing area is omitted, and FIG. 7 is a schematic diagram showing recompressed data.

As shown in FIG. 1, when the image data recording method of this embodiment is started, in step ST10,
An original is read by a scanner which is an image input device, and the process proceeds to the next step ST11.

That is, it is assumed that there is an original document in which desired characters are written in black on white paper. When this document is read by a scanner, it is read in line units according to the resolution of the scanner, for example, 400 dpi, and as shown in FIG. 2, image data of the original image that is dot data (bitmap data) in line units and Become.

Next, in step ST11, the image data of the read original image is compressed into compressed original image data, and the process proceeds to the next step ST12.

That is, the image data of the original image shown in FIG. 2 are coordinate values of bit attribute change points (hereinafter referred to as change points, also referred to as change points in the figure) as shown in FIG. 3A. And compressed original image data in units of line in which the above-mentioned and the additional attribute at the change point are paired.

That is, in the dot data for each line shown in FIG. 2, since the dot at the tip of the line (the left end in the figure, coordinate value 0) is white, the incidental attribute of (white, 0) and the coordinate value of the X coordinate are used. First, a pair of data consisting of and, that is, data of a change point 1 consisting of (white, 0) and (Z1, X1) where Z is an attribute and X is a coordinate value is created. Next, since the color changes to black at the coordinate value 4 in the traveling direction of the line, (black,
The data of the attribute change point 2 of (Z2, X2) consisting of 4) is created. Similarly, the data of the attribute change point 3 (Z3, X3) consisting of (white, A), (black,
The data of the attribute change point 4 of (Z4, X4), the data of the attribute change point 5 of (Z5, X5) of (white, 12) ... It is compressed into compressed original image data in units of two words of (Zn, Xn) which is a pair of the value X and the incidental attribute Z at the attribute change point.

The attribute data will be further described.

As shown in FIG. 3B, one word of the attribute data Z of this embodiment is composed of 16 bits, the first 1 bit is an empty area, and the next 1 bit is white. The original color with 0 as black and 1 as black is assigned, the pattern code number for editing (32 types of 0 to 31) is assigned to the next 5 bits, and the color code for editing is assigned to the next 9 bits. No. (512 colors of 0 to 511) are assigned.

The coordinate values will be further described.

As shown in FIG. 3 (C), the coordinate value X of this embodiment is composed of 16 bits per word, with 4 bits from the beginning being an empty area and changing to the remaining 12 bits. The coordinate value X (0-4091) of the point is assigned. The empty area is formed to make data processing easy by setting 1 word as 16 bits, and is used as the resolution of the scanner increases.

The compressed original image data in which the coordinate value X of the bit change point and the incidental attribute Z at the change point are paired (Zn, Xn) are as shown in FIG.
The data is hexadecimal.

In this way, the image data of the original image is converted into the coordinate value X of the bit change point and the incidental attribute Z at the change point.
The compression of line-by-line compressed original image data in which and are paired (Zn, Xn) is more efficient as the resolution when reading a document is better. For example, the number of dots forming the image data of the original image is proportional to the square of the resolution of the scanner. On the other hand, in the compressed original image data after compression, the number of lines is proportional to the resolution of the scanner, but the coordinate value X of the change point of the bit in one line and the additional attribute Z at the change point are paired ( The number of pairs of Zn, Xn) does not change. Therefore, if the resolution is squared, the number of dots is 4
However, the number of compressed original image data is only twice as many as the number of lines.

Next, an editing operation (image editing) is performed in step ST12, and the process proceeds to the next step ST13.

This image editing, for example, coloring is performed by processing the above-mentioned compressed original image data with a desired CPU or the like based on the editing command data by the image editing command from an external input device such as a tablet.

As shown in FIG. 4, the edit command data includes a 1-byte edit mode, an X coordinate to be edited, and a Y coordinate.
It is composed of an X and Y address in which each coordinate value is one word, and a one-word pattern code number / color code number.

The edit mode represents, for example, a method of designating an area for which color change (color conversion) or pattern change is desired for an original placed on a tablet, and so-called one-point designation and two-point designation. Various designation methods (modes) such as designation and multipoint designation are given in advance. Also, X,
Although the Y address differs depending on the editing mode, in the present embodiment, the minimum 1 point designation and the maximum multipoint designation are 100 or less, and the size of the entire image editing data is 12 KB.

Then, image editing is performed as follows. For example, edit mode specifies 2 points, X address is 6 ~
9 (Y address is omitted), the color code is C, and the editing command data of "color change of the black portion of the document color" is used.
When the compressed original image data shown in (a) is edited (color-changed), the compressed original image data has a change point 2 (Z2, X2) of (black, 4) as shown in FIG. 5 (a).
(Z2a, X2) consisting of (C, 6) after the data of
The data of the change point 2a called a) is added, and as a whole, (Z1, X1), (Z2, X2), (Z2a, X2
a), (Z3, X3), (Z4, X4), (Z5, X
5) ... Is converted into edited image data to be hexadecimal data shown in FIG.

Thereafter, the edited edited image data is returned to the bitmap data by the desired restoring means and output to an external output device such as a printer to obtain a desired print.

Next, in step ST13, the edited image data is recompressed image data obtained by compressing the compressed original image data, and the process proceeds to step ST14.

The step ST13 will be described in more detail.

Step ST13 is composed of step ST13a, step ST13b and step ST13c.

In step ST13a, the edit image data edited based on the edit command data is compared with the attribute (here, the document color) of two adjacent change points in the increasing direction of the X address, and the attribute is changed. If not, the change point having the larger X address is removed to convert the original compressed original image data. In the edited image data shown in FIG. 5, since the original color of the changing point 2a is the same as the original color of the changing point 2 and has not changed, it is deleted. In this case,
When the original color is black, the pattern code number and the color code number of the additional attribute Z are 0, and when the original color is white, the pattern code number of the additional attribute Z is 0 and the color code number is 0. Is set to 9.

Next, in step ST13b, data conversion is performed in a form in which the editing area is omitted.

That is, the editing area (pattern code number, color code number) is excluded from the compressed original image data of 2 words consisting of the incidental attribute Z and the coordinate value X, each of which has 16 bits, and from 16 bits. The data having the one-word structure is converted into data in which the editing area is omitted as shown in FIG. The empty area in FIG. 6 is similar to the empty area in FIG.

Next, in step ST13c, the original color at the change point is always repeated alternately due to the characteristics of the compressed data. Therefore, if the leading original color is stored,
Since the document color at other attribute change points can be easily restored, unnecessary document color portions and empty regions are omitted from the data shown in FIG. 6 in which the editing area is omitted, and as shown in FIG. The 16-bit line header section stores the original color of the leading change point and the number of change points, and the other data section that follows stores only the X coordinate value of each change point in units of 12 bits, thereby compressing the compressed image data. Further compressed recompressed image data can be obtained.

That is, in the 16-bit line header portion of the recompressed image data, the original color of the head change point (change point 1) is assigned to the head and the number of change points (0 to 32767) is assigned to the remaining 15 bits. (32,768) are allocated. And, in the 12-bit unit data part,
X coordinate values after the change point 1 (4096 points from 0 to 4095) are sequentially assigned.

Next, in step ST14, the recompressed image data and the edit command data are stored in the FD as an external storage device, and the process ends.

As described above, according to the present embodiment, the image data of the original image can be converted into a small volume of recompressed image data, and the recompressed image data and the edit command data can be stored in the external storage device. Because it can be done, unlike the conventional
It is possible to easily and quickly store the image data of the original image in an external storage device having a small capacity such as an FD, and it is possible to reliably prevent the position shift of re-editing.

As the external storage device, not only the FD but also an inexpensive HDD having a small capacity can be used.

Next, a specific example of color conversion by designating two points will be described.

First, as described above, the document is read by the scanner.

Next, the image data of the original image of the read original is compressed into line-by-line compressed original image data in which the coordinate value of the bit change point and the incidental attribute at the change point are paired. FIG. 8A is a schematic diagram showing the change points for the 16-bit X coordinate and 10-line Y coordinate in this case.
A schematic diagram showing the hexadecimal compressed original image data is shown in FIG.

Next, for example, the edit mode specifies two points,
When the color conversion is edited by the edit command data in which the X address is 3 to 7, the Y address is 4 to 8 and the color code is C,
The compressed original image data shown in FIGS. 8A and 8B is converted into the edited image data shown in FIGS. 9A and 9B.

FIG. 10 illustrates the relationship between the compressed original image data and the edited image data in which line 4 (Y address) is displayed in hexadecimal.

Next, the edited image data edited on the basis of the edit command data is converted into the original compressed original image data by removing the change points which do not change in view of the attributes of the change points. In this case, when the document color is black, the pattern code number and the color code number of the additional attribute Z are set to 0,
When the document color is white, the pattern code number of the additional attribute Z is 0 and the color code number is 9. FIG. 11 is a hexadecimal representation of line 4 (Y address) for the relationship between this edited image data and the original compressed original image data that has been converted.
For example.

Next, the data is converted into a form in which the editing area is omitted. FIG. 12 exemplifies a line 4 (Y address) represented in hexadecimal of the data in which the editing area is omitted.

Next, since the original color at the change point is always repeated alternately (white → black → white ...), the original color at other attribute change points can be easily restored by storing the leading original color. Therefore, the data in which the editing area is omitted is stored in the line header portion with the original color of the leading change point and the number of change points, and only the X coordinate value of the change point is stored in the other data portion. This makes it possible to obtain recompressed image data that is more compressed than the compressed image data. FIG. 13 illustrates the recompressed image data in which line 4 (Y address) is displayed in hexadecimal.

Then, the recompressed image data and the editing command data are stored in the FD, and the image data recording method of this embodiment is completed.

Further, the present invention is not limited to the above-mentioned embodiment, but can be modified as required.

[0052]

As described above, according to the image data recording method of the present invention, the image data of the original image can be easily and quickly stored in the external storage device having a small capacity such as FD. At the same time, an extremely excellent effect that the positional deviation of re-editing can be surely prevented is exhibited.

[Brief description of drawings]

FIG. 1 is a flowchart showing an embodiment of an image data recording method according to the present invention.

FIG. 2 is a schematic diagram showing image data of an original image.

FIG. 3 is a schematic diagram showing compressed original image data, (a)
Is a schematic diagram showing compressed original image data, (b) is a schematic diagram showing attribute data, (c) is a schematic diagram showing coordinate values, and (d) is a schematic diagram showing hexadecimal compressed original image data.

FIG. 4 is a schematic diagram showing edit command data.

5A and 5B are schematic diagrams showing edited image data, wherein FIG. 5A is a schematic diagram showing edited image data, and FIG. 5B is a schematic diagram showing hexadecimal edited image data.

FIG. 6 is a schematic diagram showing data in which an editing area is omitted.

FIG. 7 is a schematic diagram showing recompressed data.

FIG. 8 is a schematic diagram showing compressed original image data, (a)
Is a schematic diagram showing change points, (b) is a schematic diagram showing hexadecimal compressed original image data

9A and 9B are schematic diagrams showing edited image data, where FIG. 9A is a diagram similar to FIG. 8 showing a change point, and FIG. 9B is a diagram similar to FIG. 8 showing hexadecimal edited image data.

FIG. 10 is a schematic diagram showing the relationship between compressed original image data and edited image data, in which line 4 (Y address) is displayed in hexadecimal.

FIG. 11 is a view similar to FIG. 10 in which line 4 (Y address) is displayed in hexadecimal notation regarding the relationship between the edited image data and the original compressed original image data converted.

FIG. 12 is a view similar to FIG. 10 in which line 4 (Y address) is displayed in hexadecimal notation for data with the editing area omitted.

13 is a diagram similar to FIG. 10 in which line 4 (Y address) is displayed in hexadecimal for recompressed image data.

[Explanation of symbols]

 X coordinate value Z incidental attribute

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication H04N 1/387 4226-5C 1/60 1/419 9070-5C 1/46 8420-5L G06F 15 / 66 330 E 4226-5C H04N 1/40 D 4226-5C 1/46 Z (72) Inventor Yukio Sawano 2 26-30 Nishiazabu, Minato-ku, Tokyo Fuji Shashin Film Co., Ltd. (72) Inventor Sugiyama Koichi 1-7 Yukiya Otsuka-cho, Ota-ku, Tokyo Alps Electric Co., Ltd. (72) Inventor Shuichi Aratsu 1-7 Yukiya Otsuka-cho, Ota-ku, Tokyo Alps Electric Co., Ltd. (72) Inventor Hisaichi Fujisawa Alps Electric Co., Ltd. 1-7 Otsuka-cho, Yukiya, Ota-ku, Tokyo

Claims (1)

[Claims] 1. Image data of an original image, which is bit-mapped data in units of lines, is compressed original image data in units of lines in which coordinate values of bit attribute change points and incidental attributes at the attribute change points are paired. , The compressed original image data is converted into edited image data based on the edit command data, and then the edited image data is recompressed image data compressed from the compressed original image data, and the edit command data and the recompressed image A method for recording image data, characterized in that the data and the data are stored in an external storage device.