JP2806629B2 - Image processing system and device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of superimposing and outputting image data and an apparatus therefor.

[Prior Art] As a conventional screen processing method of this type, image data from an external device is input to a superimposing unit, and when the input image data is the first input data, the data is superimposed. Stored in the memory without any
If the input data is the second input data, the image data stored in the memory for the first time is selectively sent back to the superimposing means to be superimposed on the second input image data. There is an image processing method in which the image data is stored in a memory and the stored superimposed image data is output to the outside of the apparatus as composite image data (Japanese Patent Application No. 2-47046).

[Problems to be Solved by the Invention] In the above-described image processing method, there is an advantage that the processing time is shorter than the image synthesis by the previous computer, but the two received image data to be synthesized have the same size. Limited to the case. Therefore, there is a disadvantage that the second received image data cannot be superimposed on an arbitrary position of the first received image data.

Accordingly, the present invention provides an image processing method and an apparatus therefor which can reduce the time required for image synthesis and can be superimposed at an arbitrary position even if the two received image data to be synthesized do not have the same size. What you want to do.

[Means for Solving the Problems] According to the present invention, serial parallel image data from an external device is input to the superimposing means, and when the input image data is the first input image data, The image data is stored in the image data storage means without receiving the superimposition, and the stored image data is selectively sent back to the superimposition means. In an image processing method for storing image data in the image data storage means and outputting the stored superimposed image data to the outside of the apparatus as composite image data, the image data storage means stores only the first image data. XY-axis information for determining the range of the part is given, and the limited part of the first image data stored in the image data storage means is sent to the superposition means. The image processing method is characterized in that so as to superimpose the serial second input image data is obtained.

According to the invention, the XY-axis information is information that gives a first address of a first row and a last address of a last row of the image data to be superimposed, and from this information, a data amount of one line is obtained. The image processing method according to claim (1) is characterized in that signals are provided by the number of lines.

Furthermore, according to the present invention, input data receiving means for receiving image data from an external device and XY-axis information for indicating the position of a screen, and outputting the received image data as it is when the first image data is received In the case of the second image, the superimposition processing means for superimposing and outputting the separately received partial image data, the image data storage means for storing the output image data, and the first image data stored by the image data storage means Of the image data
A select circuit for receiving the image data of a limited portion determined by the XY-axis information and sending it to the overlay processing circuit as the partial image data, and receiving the stored overlay image data and sending it out as a device output; Receiving the XY-axis information from the receiving means, the image data storage means includes one line data amount for determining the image data of the limited portion of the first image data stored based on the XY-axis information. An image processing apparatus is provided that includes a control unit that supplies a control signal and also supplies a control signal to the overlay processing circuit and the select circuit.

Embodiment FIG. 1 is a block diagram showing an embodiment of the present apparatus.

First, the overall operation will be described. Serial image data is input from the input terminal 11, XY axis information for indicating the position of the drawing is input from the input terminal 12, and the input image data is input to the input buffer 13. The signal is input to the superimposing circuit 14 via the input terminal. If this input image data is the first time, it is set so that no image data is input to the other input of the superposition circuit 14, and the input data is written to the memory 15 as it is. When the input image data is the second time, the image data of the portion selected based on the XY-axis information of the first image sent earlier is sent to the other input through the select circuit 16 as described later. The two images are superimposed and written into the memory 15. The superimposed images are sent to an output terminal 18 via a select circuit 16 and an output buffer 17.

The CPU 19 receives the XY-axis information from the input buffer 13 and issues a signal for controlling the memory 15;
Read counter 21, and one-line data amount generation circuit 22
And the overlay control circuit 14 and the select circuit 16 are controlled.

 Next, the operation of each circuit will be described.

The overlay processing circuit 14 receives external image data from one terminal 41 and receives image data from the memory 15 from the other terminal 42. When storing the first image data in the memory 15, the logic of the terminal 43 is set to 0, the image data in the memory from the terminal 42 is stopped, and the image data is stored in the memory 15 as it is. Next, the second image data is stored in memory.
When the data is stored in the memory 15, the logic of the terminal 43 is set to 1 and the image data of the memory from the terminal 42 is flown and overlapped.
To be stored.

Next, the image data stored in the memory 15 is output to the selection circuit 31, and a part of the image data read from the first image data is sent to the superposition processing circuit 14 according to a control instruction of the CPU 19, and the first time. The composite image data of a part of the image data and the second image data is output from the output buffer 17 to the output terminal 18.

The timing signal required in the memory 15 is generated by operating the counter 24 by the oscillator 23 and by the ROM 25. For the read address and the write address, the necessary start address is set by the CPU 19 to operate. Overlap ON / OFF signal required by the overlay processing circuit
Output to 43.

Here, the overlapping process will be described. When data is read from the memory 19, a read address can be specified in the following procedure, and overwriting can be performed only at an arbitrary position in one screen.

First, the input buffer 13 receives the XY-axis information of the place to be superimposed on one screen. In this case, the XY axis information is, as shown in FIG. 2, the upper left point (x ₁ ,
y ₁ ) and the lower right point (x _n , y _n ). By specifying these two points, the data amount of one line and the number of lines are determined. Next, based on the information, an address corresponding to the upper left point (x ₁ , y ₁ ) of the image data to be superimposed on the read counter 21 is set, and the one-line data amount generation circuit 22 performs the main scanning of the superimposed image data. data amount of one line in the direction (x _n -x ₁₎
Is set. In the figure, the shaded portions indicate the overlapping ranges.

In this state, reading is started, and one line of image data is read from the address set in the read counter 21 by the gate signal of the data amount of one line generated by the one line data amount generating circuit 22. When the data for one line is read, an interrupt signal is received from the one-line data amount generation circuit 22, and the read start point (x ₁ , y ₂ ) of the next line is obtained. Is reset in the read counter 21. Performing a predetermined overlapping processing to the start point by repeating this becomes (x _1, y _n).

If the overlapping portion is not a single rectangle, for example, if it has a convex shape, it is divided into a small rectangle at the top and a large rectangle at the bottom, and two types of XY axis information are successively given.

[Configuration of the Invention] As described above, according to the present invention, by receiving XY-axis information of a place where two pieces of image data to be originally synthesized on a computer are to be overlapped, only a certain arbitrary place is overlapped at a high speed. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a state of a memory when performing superposition. Explanation of symbols: 13 ... input buffer, 14 ... overlay processing circuit, 15 ...
Memory, 16 select circuit, 17 output buffer, 19 CPU, 2
0: Write counter, 21: Read counter, 22: One-line data amount generation circuit, 23: Oscillator, 24: Counter, 25: ROM.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G06T 1/00 H04N 1/387

Claims (3)

(57) [Claims] 1. An image processing apparatus according to claim 1, wherein serial image data from an external device is input to the superimposing means, and when the input image data is the first input image data, the image data is stored in the image data storing means without being superimposed. At least a part of the stored image data is selectively sent back to the superimposing means. The superimposing means superimposes the image data on the second input image data. In an image processing method for storing the superimposed image data stored in a storage means and outputting the stored superimposed image data to the outside of the apparatus as a composite image data, a range of a limited part of the first image data is determined in the image data storage means. XY-axis information is given, and a limited portion of the first image data stored in the image data storage means is sent to the superimposing means, and the second input image data is Image processing system, characterized in that it was set to match it. 2. The XY-axis information is information for giving a first address of a first row and a last address of a last row of the image data to be superimposed, and a signal of a data amount for one line is obtained from this information. 2. The image processing method according to claim 1, wherein the number of lines is given by the number of lines. 3. An input data receiving means for receiving image data from an external device and XY axis information for indicating a position of a screen, and outputting the received image data as it is when the first image data is received. In the case of the second image, superimposing means for superimposing and outputting separately received partial image data, image data storing means for storing the output image data, and first image data stored in the image data storing means A select circuit which, when receiving image data of a limited portion determined by the XY-axis information, sends the image data to the overlay processing circuit as the partial image data, and when receiving the stored overlay image data, sends it as a device output; One line for receiving the XY axis information from the output data receiving means and determining the limited part of the first image data stored in the image data storage means based on the XY axis information. An image processing apparatus for providing a control signal including a data amount and a control means for supplying a control signal to the overlay processing circuit and the select circuit.