JPH0454570A - Image processor - Google Patents

Abstract

PURPOSE:To shift one of plural images displayed in superposition at a high speed by providing a synthesization processing part to decide the output of the image data stored in a 1st or 2nd display memory based on the data on the 1st and 2nd mask memories. CONSTITUTION:The data of the same addresses are read out of the display memories 11a and 11b and the mask memories 12a and 12b respectively under the control of a memory control part 14 and inputted to a synthesization processing part 13. At the part 13 the image data stored in the memory 11a or 11b is decided based on a logical table and in response to the data on the memories 12a and 12b and then outputted. Thus the processed image data are sent to a display part and shown there. Then the images superposed on each other in two display memories can be partly shifted. As a result, a part of the images superposed on each other in two display memories, especially an intermediate image can be shifted at a high speed regardless of the number of images to be superposed on each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device, and more particularly to an image processing device that moves one of a plurality of images displayed in a superimposed manner at high speed.

[Prior Art] In image editing devices and the like, it is necessary to move, rotate, enlarge and reduce images, etc. on a display unit at high speed.

For example, when moving one of the plurality of superimposed images displayed on the display unit 21 as shown in FIG. 2, the following method is usually used.

As shown in FIG. 3, a conventional image processing device has a multi-value display memory 31 corresponding to the number of images being displayed, and a mask memory 32 that indicates the existence of images on the display memory 31. The movement is performed by rewriting only the data in the display memory 31 and mask memory 32 that store the data. For example, when moving the triangle 24 in FIG. 2, only the data in the display memory 31c and mask memory 32c that store the image of the triangle 24 are rewritten and moved.

[Problems to be Solved by the Invention] However, although this method allows for high-speed movement, there is a problem in that a display memory equal to the number of images is required. In addition, since the number of images to be superimposed cannot be predicted, there is a problem in that it is necessary to prepare the maximum number of display memories expected in advance. [Means for Solving the Problems] The present invention consists of the above points. The purpose of this device is to provide an image processing device that can move superimposed images at high speed and with a small amount of display memory. In an image processing apparatus that moves two devices, a first display memory stores image data of a moving image at an address corresponding to a display position of the display section, and a first display memory stores image data of the moving image at an address corresponding to a display position of the display section; a first mask memory that stores data indicating an area in which the image is being moved; a second display memory that stores image data of an image other than the moving image at an address corresponding to a display position of the display section; a second mask memory that stores data indicating an area in which image data of an image to be displayed above the moving image is written, out of the image data stored in the display memory;
The present invention further includes a composition processing section that determines which image data of the first display memory or the second display memory is to be output based on the data of the second mask memory.

[Embodiment] FIG. 1 is a block diagram of an embodiment of an image processing apparatus of the present invention. In FIG. 1, reference numeral 11 is a display memory that stores multivalued image data, lla is a display memory that stores moving image data, and llb is a display memory that stores image data that does not move.

12 is a mask memory; 12a is a mask memory indicating an area in which image data of the display memory 11a is written;
Reference numeral 12b is a mask memory indicating an area in which data of an image to be displayed is written above the image stored in the display memory lla among the image data written in the display memory llb. Reference numeral 13 denotes a composition processing section, which includes the display memories 11a, llb, ? Based on the data stored in the instant memories 12a and 12b, images are synthesized in a predetermined order, and the data is sent to the display section. Reference numeral 14 denotes a memory control unit that controls writing, reading, and movement of data in the display memory 11 and mask memory 12.

For example, when moving the triangle 24 in FIG. 2, the following processing is performed.

First, the memory control unit 14 reads the image data of the moving triangle 24 from an image memory such as a hard disk (not shown), and writes it to the address corresponding to the display position of the display unit of the display memory lla as shown in FIG. At the same time, as shown in FIG. 4C), the bit in the area of the mask memory 12a where the image data of the triangle 24 is written in the display memory lla is set to rlJ. Also display memory llb
4, the image data of the images that do not move among the images displayed as shown in FIG. Write as shown in 3).

Further, in the mask memory 12b, the bit in the area where the image data of the image to be displayed above the triangle 24 is written is set to ``1''. The bit in the area where the image data of is written is set to "1" as shown in FIG.

The process of writing each data into the display memory 11 and mask memory 12 in this manner is performed, for example, at the stage when the operator specifies the image to be moved using the keyboard or the like.

When moving the triangle 24, each data in the display memory lla and the mask memory 12a is moved as shown in FIG. 5 ωQ) under the control of the memory control unit 14.

Each piece of data subjected to such processing is sent to the synthesis processing unit 13.
The following processing is performed, and the determined image data is sent to the display unit.

First, display memories lla, llb, mask memory 12a,
Data at the same address are respectively read out from the four memories 12b under the control of the memory control section 14 and input to the synthesis processing section 13. The composition processing unit 13 selects the display memory l according to the mask memory 12a, 12b (7) data.
It is determined which of the image data stored in la and llb is to be output. The logical table at that time is shown in FIG. Image data to be output is determined according to this logical table. Such processing is performed for each data at each address of the four memories to determine which image data from the 1-display memory control section and llb is to be output. The image data processed in this way is then sent to the display section and displayed.

By doing as described above, it is possible to move a part of the image superimposed on the two display memories.

[Effects of the Invention] As described above, the present invention has the effect that a part of the superimposed images, especially an image located in the middle, can be moved at high speed using two display memories regardless of the number of images to be superimposed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the image processing device of the present invention;
FIG. 2 shows a display example of superimposed images, FIG. 3 shows an example of a conventional image processing device, FIGS. 4 and 5 are diagrams explaining the present invention in detail, and FIG. 6 shows a logic table. 11...Display memory 12...Mask memory 13...Composition processing section 14...Memory control section

Claims (1)

[Claims] (1), one of the multiple images superimposed on the display unit
An image processing device that moves two parts, a first display memory that stores image data of a moving image at an address corresponding to a display position of the display unit, and a first display memory in which the image data of the first display memory is written. a first mask memory that stores data indicating an area in which the image is being moved; a second display memory that stores image data of an image other than the moving image at an address corresponding to a display position of the display unit; Of the image data stored in the display memory,
a second mask memory that stores data indicating an area in which image data of an image to be displayed above the moving image is written; An image processing device comprising: a composition processing unit that determines which image data of a display memory and a second display memory is to be output.