JP2618863B2 - Image data processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention displays input image data two-dimensionally on a data display unit and stores the image data in a memory. The present invention relates to a data processing device.

(Prior Art) Some communication apparatuses display image data received by a receiving unit or two-dimensionally displayed on a data display unit in accordance with an input operation by an operator in an input unit, or a data display unit in a memory. A method of saving a file for each display screen has been considered.

Such an image data processing device is configured, for example, as shown in FIG. That is, in the figure, reference numeral 1 denotes an input unit composed of a light pen and a digitizer.
Is for inputting X and Y coordinate data (hereinafter also referred to as image data) representing the existence and position of an input pixel by an operator's pen operation. The image data input from the input unit 1 is input to a control unit 2 formed by, for example, a microprocessor. The control unit 2 is connected to a receiving unit 4 for receiving image data input via the communication line 3 and a transmitting unit 5 for transmitting image data to the outside via the communication line 3. Further, the control unit 2 is connected to a display memory 7 having storage elements arranged in the same manner as the display elements arranged two-dimensionally in a lattice of a data display unit 6 for displaying input image data two-dimensionally. ing. Therefore, each storage element of the display memory 7 has a one-to-one correspondence with each of the two-dimensionally arranged display elements of the data display unit 6.
The control unit 2 is connected to a storage memory 8 that can store image data for one display screen stored in each storage element of the display memory 7 for a plurality of images.

In such an image data processing device, image data composed of X and Y coordinate data input in time series to the input unit 1 or the receiving unit 4 is sent to the control unit 2. The control unit 2 stores the applied image data in the storage element of each of the storage elements of the display memory 7 which is located at the X, Y coordinates specified by the image data. Specifically, a bit [1] is set in the storage element located at the corresponding coordinate. The input image data is sequentially stored in the corresponding storage element of the display memory 7, and when an input end code is input from the input unit 1 or the receiving unit 4, the display memory for the image data for one display screen is displayed. 7, the image data stored in each storage element of the display memory 7 is moved to the data display unit 6 as it is, so that the data display unit 6 stores the image data.
The data for the display screen is displayed.

When the display data displayed on the data display unit 6 is stored, the bit data [1] or [0] stored in all the storage elements of the display memory 7 is used as image data for one display screen. The data is directly transferred to the storage memory 8.

However, the above-described image data processing apparatus has the following problems. That is, in order to store image data for one display screen in the storage memory 8, a storage area is required for the number of storage elements constituting the display memory 7. Therefore, a storage area for the number of display screens to be stored is required.

Therefore, in the case of a graphic that uses only a part of the display screen of the data display unit 6 or a graphic that uses the whole, but is a simple graphic, the storage area of the [0] bit data is stored in the storage memory 8. This means that most of the storage memory is used, and the memory use efficiency of the entire storage memory is greatly reduced.

(Problems to be Solved by the Invention) As described above, in the conventional image data processing apparatus, the use efficiency of the storage memory is reduced, and the storage capacity of the storage memory is greatly increased in order to store many display screens. There is a need.

The present invention has been made based on such circumstances, and an object of the present invention is to store image data consisting of coordinate data input in chronological order in a storage memory in the order of storage area addresses. Another object of the present invention is to provide an image data processing apparatus which can effectively use a storage memory and can store a large number of display screens with a small storage capacity.

[Structure of the Invention] (Means for Solving the Problems) In the image data processing apparatus of the present invention, each coordinate data representing the existence and the position of the input pixel sequentially input in time series is stored in the storage memory. The data is sequentially stored in each data storage area in the order of the area addresses, and a warning signal is output when the number of remaining data storage areas in the storage memory falls below a predetermined limit value.

(Operation) In the image data processing device configured as described above,
The input coordinate data is stored in the storage element located at the corresponding coordinate in the display memory, and is displayed as a pixel on the display element located at the corresponding coordinate in the data display unit. Therefore,
Each of the input coordinate data is displayed two-dimensionally on the data display unit. The input coordinate data is stored in each storage area of the storage memory in the order of area addresses. Therefore, when storing coordinate data for one display screen of a figure having many blank portions, a small storage capacity is sufficient.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an image data processing apparatus according to the embodiment. In the figure, reference numeral 11 denotes an input unit for the operator to operate the light pen and the digitizer to input image data including X and Y coordinate data. The input unit 11 includes a data storage command key for inputting a data storage command for moving the storage content of a buffer memory 12 described below to the storage memory 13 and an input end command for inputting that the input operation of all image data has been completed. Keys are arranged.

Each image data input to the input unit 11 is sent to a control unit 14 including a microprocessor or the like. This control unit
A receiving unit 16 for receiving image data input from the outside via a communication line 15 and a transmitting unit 17 for transmitting image data to the outside via the communication line 15 are connected to 14. Further, the control unit 14 is connected to a display memory 19 having storage elements arranged in the same manner as the display elements arranged two-dimensionally in a lattice of a data display unit 18 for displaying input image data two-dimensionally. Have been. Therefore, each storage element of the display memory 19 has a one-to-one correspondence with each of the two-dimensionally arranged display elements of the data display unit 18. Further, a warning display unit 20 which is provided adjacent to the data display unit 18 and displays a warning message for warning that the number of remaining data storage areas in the buffer memory 12 or the storage memory 13 has become zero is provided to the control unit 14. It is connected.

Further, the control unit 14 includes a buffer memory 12 that sequentially stores image data composed of coordinate data sequentially input via the input unit 11 or the reception unit 16 in a time-series manner, and is temporarily stored in the buffer memory 12. A storage memory 13 for storing image data is connected.

The transmission format of the image data sent from the input unit 11 to the control unit 14 is composed of 5 bytes as shown in FIG. 2, and the first byte stores a command indicating the operation and state of the light pen. Are three types: [pen-up operation], [pen-down operation], and [pen writing (contact state)]. The second and third bytes store the X coordinate of the light pen, and the fourth and fifth bytes store the Y coordinate of the light pen. Therefore, one piece of image data is formed by the command and the X and Y coordinate data.
Then, the image data is sent to the control unit 14 at regular intervals.

As shown in FIG. 3, the storage memory 13 includes a plurality of data files 21 for storing image data of 5 bytes for one display screen displayed on the data display section 18, and each of these data files 21. A file name area 22 for storing each file name of the data stored in the storage area, and a storage address area 23 for storing a start address (AD) and an end address (AD) of each data file 21 for each file name are formed. ing. Further, in each data file 21, a plurality of data storage areas 24 each having a set of 5 bytes for storing each image data are formed.

Therefore, the number of data areas 24 constituting each data file 21 is determined by the number of image data required to form one display surface in the data display unit 18. The number of data structures varies. As a result, as shown, the size of the data file 21 also varies depending on the type of the displayed graphic.

Thus, the control unit 14 is programmed so as to execute processing on input image data in accordance with the flowchart of FIG. That is, when the flowchart starts, P1
When it is confirmed that the key of the input end command key of the input unit 11 is not operated by, it is also confirmed that the key of the data storage command key of the input unit 11 is not operated by P2. When the confirmation is completed, the process waits at P3 for the elapse of a predetermined time indicating a cycle for executing the flowchart. After a lapse of a predetermined time, at P4, the 5-byte image data shown in FIG. 2 input from the input unit 11 is read. Then, in P5, it is confirmed that the image data is different from the image data read in the previous cycle stored in the internal storage unit, and in P6, the command of the first byte is "pen writing".

If the image data input in P5 is the same as the previous image data, it indicates that the operator has not moved the light pen from the previous position at all, and the same image data is
Reading and processing each time is useless, and data redundancy increases. Therefore, in such a case, the process returns to P1 to execute the next cycle without performing the subsequent data processing. Similarly, in P6, if the command of the image data is [Pen-up operation] and [Pen-down operation], since the image data during this period is not the data intended by the operator, the subsequent processing is not executed as described above. The first P1 of the flow chart
Return to

If the read 5-byte image data is normal, the image data is stored in the next empty address of the buffer memory 13 at P7. Further, the image data read at P8 is stored in the display memory 19. That is, of the storage elements forming the display memory 19, the X and Y coordinate data of X and Y coordinate data formed by [X] of the second and third bytes and [Y] of the fourth and fifth bytes of the input image data The bit of the storage element located at the designated coordinates is set to [1]. Then, the data display section 18
Is turned on. And P9
When it is confirmed that there is still a free area in the buffer memory 12 for storing image data of 5 bytes, the flow returns to the first P1 in the flowchart. If there is no more free area in the buffer memory 12 at P9, a warning message of [buffer memory full] is displayed on the alarm display unit 20 at P10, and this processing ends.

When a data storage command is input from the input unit 11 at P2,
It is determined that the image data input processing for one display screen has been completed, and the image data for one display screen stored in the buffer memory 12 in time series is moved to the data file 21 of the storage memory 13 in P11. In this case, the start address in the storage memory 13 for newly storing image data is the storage address area 23.
Is the address next to the last end address (AD) that has already been set. At the same time, the data file name is set in the file name area 22, and the start address and end address of the stored image data are newly set in the storage address area R23.

When the storage process for the storage memory 13 is completed, when it is confirmed at P12 that there is a free data storage area 24 for storing new image data in the storage memory 13, the process returns to the first P1 in the flowchart. When the remaining data storage area 23 of the storage memory 13 runs out in P12, a warning message of “storage memory full” is displayed on the alarm display unit 20 in P13.

Further, when an input end command is input from the input unit 11 at P1, the flowchart ends.

In this flowchart, the case where image data is input from the input unit 11 is shown, but the same processing is performed when image data is input to the receiving unit 16 via the communication line 15.

With the image data processing device configured as described above,
The number of image data for one display screen of the data display unit 18 stored in the storage memory 13 greatly varies depending on the complexity and size of the graphic displayed on the data display unit 18. Therefore, the storage capacity of the data file 21 required to store image data for one display screen is a capacity corresponding to the complexity and size of the figure. As a result, in the case of simple figures, the storage capacity of the data file 21 is small, and
13 It is possible to effectively use the entire storage capacity.
Therefore, display data of a large number of display screens can be stored with a small storage capacity.

FIG. 5 is a block diagram showing an image data processing apparatus according to another embodiment of the present invention. The same parts as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In this embodiment, the buffer memory 12 in FIG. 1 is omitted, and the image data input from the input unit 11 is sent to the display memory 18 and stored directly in each data storage area of the storage memory 25. I have. Therefore, the storage memory 25 does not have a file name area and a storage address area. Therefore, the input unit 11 is not provided with a data storage command key.

Thus, the control unit 14 of this embodiment is programmed so as to execute the flowchart of FIG. The processing operation of Q1, Q2, Q3, Q4, and Q5 in the flowchart is represented by P1, P3,
Same as P4, P5, P6. The 5-byte image data read at P7 is stored in the data storage area located at the address next to the data storage area in the storage memory 25 where the image data has already been stored. The process of Q7 is the same as the process of P8 in FIG.

In Q8, it is checked whether or not a new data storage area for storing image data exists in the storage memory 25. Then, if it does not exist, the warning display unit 20 displays [Save memory full] in Q9.
Display a warning message.

Even in the image data processing apparatus configured as described above, since the storage memory 25 can store the image data constituting one display screen in a packed manner, it is possible to obtain substantially the same effect as the embodiment of FIG. It is possible.

The present invention is not limited to the embodiments described above. In the embodiment, a predetermined limit value [0]
When the number of free data storage areas in the storage memory is exhausted, a warning message of [Memory Full] is displayed, but by setting the limit value to a value other than [0], It is possible to notify in advance that the number of remaining free data storage areas has decreased.

[Effects of the Invention] As described above, according to the present invention, each coordinate data representing the existence and position of an input pixel input in time series is packed and stored in a storage memory in the order of recording area addresses. I have. Therefore, the storage memory can be used effectively, and a large number of display screens can be stored with a small storage capacity.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an image data processing apparatus according to an embodiment of the present invention, FIG. 2 is a diagram showing a transmission format of image data of the embodiment, and FIG. FIG. 4, FIG. 4 is a flowchart showing the operation of the embodiment, FIG. 5 is a block diagram showing an image data processing apparatus of another embodiment of the present invention, and FIG. 6 shows the operation of the other embodiment. FIG. 7 is a block diagram showing a conventional image data processing apparatus. 11 input section, 12 buffer memory, 13 storage memory, 14 control section, 15 communication line, 16 reception section, 17
…… Sending section, 18 …… Data display section, 19 …… Display memory,
20 warning display section, 21 data file, 22 file name area, 23 storage address area, 24 data storage area, 25 storage memory.

Continued on the front page (72) Inventor Takahiro Endo 3-1-1, Asahigaoka, Hino-shi, in Toshiba Hino Factory Co., Ltd. (72) Inventor Takashi Saeki 3-1-1, Asahi-gaoka, Hino-shi, Toshiba Hino Factory (56) References JP-A-57-25004 (JP, A) JP-A-61-103296 (JP, A) JP-A-60-76859 (JP, A)

Claims (1)

(57) [Claims] 1. Coordinate data sequentially inputted in a time series is regarded as data representing the existence and position of each pixel, and these coordinate data are used as the corresponding coordinates of a display memory having a plurality of storage elements arranged in a coordinate array. After storing in the storage element of the position, the display position of each display element is displayed on the corresponding display element of the data display unit set so as to correspond to the arrangement position of each storage element of the display memory, and the data display is performed. An image data processing device for storing each coordinate data displayed on a storage unit in a storage memory, wherein each of the coordinate data sequentially input in time series is sequentially stored in each data storage area of the storage memory in the order of area addresses. Storage means, and warning means for outputting a warning signal when the number of remaining data storage areas in the storage memory falls below a predetermined limit value. Image data processing apparatus characterized by.