JP2647367B2 - Image composition method - Google Patents

Description

The present invention relates to an image synthesizing method.

[Prior Art] In the conventional image synthesis, when a second image is synthesized with a first image, a rectangular area for synthesizing a second image is provided on the first image, and the rectangular area is formed there. The second image was inset.

[Problems to be Solved by the Invention] However, in the conventional image synthesizing method, an image of a complicated shape not limited to a rectangle is cut out from the image as a synthesized image,
When synthesizing another image, in order to define the complex image, it is necessary to have, as a bit map, flag information indicating where the complex image is located in a frame image including an image having a complicated shape. . Therefore, the conventional method requires a total of three frame memories, that is, two frame memories corresponding to two frames of images used for synthesis and a frame memory for storing flag information, which requires a large memory capacity. was there.

[Means for Solving the Problems] In order to solve such problems, the image synthesizing method according to the present invention provides a method for adding non-rectangular image data in a second one-screen image to a first one-screen image. An image synthesizing method for synthesizing, wherein image data constituting the image of the first screen is stored in a first storage unit, and the image data of the second screen different from the image of the first screen is stored. The image data constituting the image is stored in the second storage means, and the first image data is stored without storing the address for one screen corresponding to the image for the first one screen.
A non-rectangular image data area in the second one-screen image to be synthesized with the one-screen image, and a boundary line defining the non-rectangular shape on the first one-screen image. A result of storing an address in a third storage means, accessing image data constituting the image of the first one screen in the order of addresses, and comparing the address with the address of the boundary line stored in the third storage means Outputting image data constituting the first screen to an image forming apparatus in an area not considered as an area where the non-rectangular image data is combined with the image of the first screen; In the area considered as the area where the non-rectangular image data is combined with the one-screen image, the non-rectangular image data is transferred from the image data forming the second one-screen image to the image forming apparatus. Characterized by outputting .

Embodiment An embodiment will be described below in detail with reference to the accompanying drawings.

The image synthesizing device shown in FIG.
(V-RAM) 2, an image memory group 3 composed of image memories for the number of combined images, a ROM 4, a CPU 5,
RAM6. The image memory group 3 includes n image memories 3-1 to 3-n in order.

In the configuration of FIG. 1, the case where the image memory group 3 includes two image memories 3-1 and 3-2 will be described. First, the program stored in the ROM 4 causes the CPU 5 to first store the data in the image memory 3-1. The data is transferred to the V-RAM 2 until the address matches the first address stored in the control RAM 6. When the addresses match, the image memory 3
-2 data is transferred to the V-RAM 2 until it matches the second address stored in the control RAM 6. From the point in time when the address matches the second address, the image memory 3-1 is returned again.
Is transferred to the V-RAM 2 until it matches the third address stored in the control RAM 6. Thereafter, the above operation is repeated until the end address is reached, and the contents of the V-RAM 6 are output to the CRT 1.

 Hereinafter, the present embodiment will be described in more detail.

FIG. 1 is a block diagram of an image synthesizing apparatus. The image data of FIG. 2A is stored in an image memory 3-1 and the image data of FIG. 2B is stored in an image memory 3-2. ing. As shown in FIG. 2 (c), the control RAM 6 stores the address of the boundary line when the two image data are combined. In this embodiment, one screen is 256 × 256 and the address is
HEX (0000 to FFFF).

FIG. 3 is a flowchart of the image synthesizing program stored in the ROM 4. First, in step S31, the image address is initialized to HEX (0000). Then step S
At 32, the image data of the image address HEX (0000) in FIG. 2A is sent from the image memory 3-1 to the V-RAM2.
The image address is counted up in step S33, and H
It becomes EX (0001), the end of the transfer is checked in step S34, and in step S35, it is compared with the first address HEX (1ABO) of the control RAM in FIG. 2 (e). Since the two addresses are not equal, the process returns to step S32 and the image address HEX
The data of (0001) is sent to the V-RAM2. Hereinafter, the image memory 3-1 until the image address becomes HEX (1ABO).
Is sent to the V-RAM2. Image address is HE
When X (1ABO) is reached, the address matches the address in the control RAM in step S35, and the flow advances to step S36 to send the image data in the image memory 3-2 (FIG. 2B) to the V-RAM2. The image address is counted up in step S37 and becomes HEX (1AB1). In step S38, the end of the transfer is checked. In step S39, the address HEX (1AB1) and the second address HEX (1) in the control ROM 6 shown in FIG.
AB3) is compared. Since they are not equal, the process returns to step S36, and thereafter, steps S36-37-38-39 are repeated until the image address becomes HEX (1AB3), and the image data of the image memory 3-2 is sent to the V-RAM2. When the image address becomes HEX (1AB3), the steps from step S39
Proceeding to S32, the image data in the image memory 3-1 is sent to the V-RAM2 again until the image address matches the third address HEX (1BAC) in FIG. 2 (e).

The image data is sent until the end address is reached, and the second
The combination of the image memories 3-1 and 3-2 is achieved as shown in FIG.

Next, an example of moving and synthesizing images according to the flowchart of the image moving program shown in FIG. 4 will be described.

For example, minus in the x direction as the amount of image movement from the customer
HEX (60), plus HEX (10) is input in the y direction. First, in FIG. 4, the movement amount is read in step S41, the process proceeds from step S42 to step S43, and HEX (60) is subtracted from the address in the control RAM 6 in steps S43-44, and the control R
The contents of AM6 are converted from FIG. 2 (e) to FIG. 2 (f). Next, in step S45, minus HEX (60) in the x direction is stored in the control RAM 6. In step S47-48, the control R
A value obtained by multiplying HEX (FF) by minus HEX (10) obtained by inverting the sign of the movement amount in the y direction to the address in AM6 is added, and the contents of the control RAM 6 are changed from FIG. g), and in step S49, the positive HEX (10) in the y direction is
Stored in M6. The image synthesis is performed according to the flowchart of FIG. 3 image synthesis. At this time, when the image data is transferred from the image memory 3-2 to the V-RAM2, the read address from the image memory 3-2 is controlled. For RA
HEX (60) and HEX (10 ×
FF) is added, a composite image as shown in FIG. 2D is obtained.

In the embodiment, the case where the number of the image memories is two is described.

Further, how to obtain an image address, how to calculate the movement amount, and the like are not limited to the present embodiment. If the image memory is rotated by the moving amount when the image is moved, the processing at the time of composition is simplified.

[Effects of the Invention] As described above, according to the present invention, one image corresponding to the image of the first screen is displayed.
A non-rectangular image data area in the second one-screen image to be combined with the first one-screen image without storing the address for the first screen, and the first one-screen image The address of the boundary line defining the above non-rectangular shape is stored in the third storage means, and the image data constituting the image of the first one screen is accessed in order of address, and is stored in the third storage means. As a result of comparison with the address of the boundary line, the image data forming the first screen is displayed in an area that is not regarded as an area where the non-rectangular image data is combined with the image of the first screen. In the area which is output to the forming apparatus and which is considered as an area where the non-rectangular image data is combined with the first one-screen image, the non-rectangular image data constituting the second one-screen image is Image data from the image forming apparatus Since output, after having realized the image synthesis of non-rectangular shape, it is possible to reduce the memory capacity by reducing an address amount to be stored as much as possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of an image synthesizing apparatus, FIG. 2 (a) is an image 1, FIG. 2 (b) is an image 2, FIG. 2 (c) and (d) are synthetic diagrams, 2-(e), (f), (g) are diagrams showing boundary line addresses in the control RAM, FIG. 3 is a flowchart of an image synthesizing program, and FIG. 4 is a flowchart of an image moving program. It is. In the figure, 1 ... CRT, 2 ... V-RAM, 3 ... Image memory group, 4 ... ROM, 5 ... CPU, 6 ... Control RAM.

Continuation of front page (56) References JP-A-60-154293 (JP, A) JP-A-59-146363 (JP, A) JP-A-58-189763 (JP, A) JP-A-58-217076 (JP) JP-A-59-170959 (JP, A) JP-A-60-245040 (JP, A)

Claims (1)

(57) [Claims] An image combining method for combining non-rectangular image data in a second one-screen image with a first one-screen image, wherein the first one-screen image is configured. Storing image data in a first storage means, storing image data constituting an image of the second one screen different from the image of the first one screen in a second storage means, Without storing the address of one screen corresponding to the image of one screen, the area of the non-rectangular image data in the image of the second screen to be combined with the image of the first screen is defined. In addition, an address of a boundary defining a non-rectangular shape on the image of the first screen is stored in a third storage means, and image data constituting the image of the first screen is accessed in address order. And comparing the address of the boundary line stored in the third storage means with the address of the boundary line. As a result of the comparison, in an area that is not regarded as an area where the non-rectangular image data is combined with the image of the first screen, image data forming the first screen is output to an image forming apparatus. In the area considered as the area where the non-rectangular image data is combined with the image of the first single screen, the image data of the non-rectangular shape is formed from the image data forming the image of the second single screen. An image synthesizing method characterized by outputting to an apparatus.