JPH0549993B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an image data processing device that can perform optimal scaling processing of image data with a simple setup.

[Prior Art] Conventionally, in image data processing devices, when enlarging or reducing image data, the original data is moved to a certain location and the size is enlarged or reduced by eye using a pointing device or the like. . As a result, the drawback was that the data you really wanted could not be obtained and the same process had to be repeated over and over again.

[Purpose] In view of the above points, an object of the present invention is to provide a pattern indicating the size of a specified area, image data that is scaled independently vertically and horizontally according to the specified area, and a neighborhood of the scaled image data. It is an object of the present invention to provide an image data processing device that outputs numerical values indicating the respective magnification factors derived from the above.

[Example] The present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing the configuration of an embodiment of the present invention. The CPU is a central processing unit that performs main control.
DU is a display unit that outputs a visible image.
IR is an image reader for inputting images. PD is a pointing device that inputs position designation input for visible images and accompanying function commands. The KB is a keyboard that is provided with alphanumeric keys, numbers, and other keys, and is used to input control commands and the like. DISK is a disk unit for storing image data, etc. BUS is a system bus that connects the above devices and transmits information. RAM is random access memory that stores original data, and PM is program memory that stores processing programs.

The operation will be explained in the above configuration. First of all
The IR forms image information by inputting an image and temporarily storing it in the memory within the CPU. This image information may be immediately displayed on the display unit DU and converted into a visible image, but
You can also save it to a DISK and call it up later for use. Multiple pieces of image information that have already been input are stored in the DISK. These general instructions are then given via the keyboard KB. Next, the operator selects and calls up any image information from the DISK, if necessary, and converts it into a visible image using the display unit DU.

Next, FIG. 2 shows a block diagram of the structure of the display unit DU. A CRT is a display device that includes a DA converter that converts input image information into a video signal using a raster scan method. VRAM is for storing image information of images according to scanning order. DCTL is a display control unit that performs main control of DU. PR is a position designation register that holds coordinate values according to the XY coordinate axes of the screen, and this value is set by position designation information input from the pointing device PD. LG is a straight line generation circuit that draws a straight line horizontally and vertically from the coordinates of two points stored in the position specification register, and displays a rectangular area on the CRT.
CCT is an enlargement/reduction circuit that takes the rectangular area specified by the linear generation circuit as original image data and immediately enters the rectangular area on the destination side specified at another position by the linear generation circuit. Enlarge or reduce the image as shown below. The alphanumeric generator circuit displays a number or the like representing the ratio between original data and destination data.

An example of the operation under the above configuration will be explained with reference to the flowchart of FIG. 3 and the display example of FIG. 4.

First, in step S1, a starting point is determined using the pointing device PD or the keyboard KB. The data is stored in the position specification register PR. Then, starting point 3- shown in Figure 4B
2 is displayed. Next, in step S2, the end point is input using the pointing device PD. The data is also stored in the position specification register PR.
Then, the end point 3-3 shown in FIG. 4B is displayed. After that, in step S3, the position specification register is
A rectangular area is formed at a predetermined position on the video random access memory VRAM in the straight line generation circuit LG by referring to the data of the start point and end point stored in PR, and the rectangular area 3-6 shown in FIG. 4B is displayed. . Subsequently, in S4, the central processing unit CPU calculates the ratio between the rectangular area of the original data and the rectangular area of the destination data. The result is video random access memory
Store in VRAM, 3-4, 3-5 in Figure 4B
Display both vertically and horizontally, as in Then, in step S5, it asks whether the ratio is the desired ratio. If it is not the desired ratio, go to step S6, erase the data at the end point of the position designation register, the rectangular area on the destination side of the video random access memory VRAM, and the ratio, and display the data on the display.
Erase from CRT. Then, the process returns to step S2 again.
If the ratio is the one determined in step S5, then in step S7 the image within the rectangular area of the original data is enlarged or reduced using the reduction circuit CCT.
It is stored in the video random access memory VRAM and displayed in a rectangular area on the destination side of the display CRT.

[Effects] As detailed above, according to the present invention, a pattern indicating the size of a designated area, image data that has been scaled independently vertically and horizontally according to the designated area, and a pattern in the vicinity of the scaled image data. It has become possible to provide an image data processing device that outputs the derived numerical values indicating each of the magnification ratios.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the display unit. Figure 3 is a flowchart showing the processing process. FIG. 4 is a diagram showing an example of display on the screen of the display device. DU...Display unit. IR...Image reader. PD... Pointing device.
CCT...magnification/reduction circuit. PR...Position specification register.

Claims (1)

[Scope of Claims] 1. Output means for outputting image data, area setting means for setting a desired area, and determining the image data based on the size of the area set by the area setting means and the size of the image data. Deriving means for independently deriving scaling factors in the vertical direction and horizontal direction, scaling means for scaling the image data based on the respective scaling factors derived by the deriving means, and area specifying means a pattern indicating the size of the region specified by the image data, image data scaled by the scale changing means, and a pattern derived by the deriving means in the vicinity of the scaled image data. An image data processing device comprising: a numerical value indicating each magnification ratio; and an output control means for controlling the output means to output.