JPS63118984A - Segmenting method for arbitrary area of image - Google Patents

Abstract

PURPOSE:To quickly segment an arbitrary area by securing a rectangular area in the same side as rectangular areas circumscribing the arbitrary area in image data and logically operating the rectangular areas circumscribing the arbitrary area in the image data. CONSTITUTION:If a display figure is enclosed by a cursor position data group 19, the rectangular areas circumscribing the arbitrary area and the area in the same size as an area 20 are secured in a memory, and the area 23 in the same shape as the arbitrary area is written in black in the rectangular area 21 of the memory. A rectangular area 21 equipped with a blacked area and the rectangular are 20 are logically operated, and the results are shifted to the rectangular area in the memory, thereby obtaining a segment area 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for cutting out an arbitrary region of an image, cutting out only a necessary region from image data as image data.

BACKGROUND OF THE INVENTION As shown in FIG. 5, this type of conventional method displays read image data 1 as an image on a display unit 1a, and selects a necessary area 2 in the displayed image data 1, as shown in FIG. When specifying with a cursor, determining only the necessary image data of the necessary area corresponding to the position data group 3 by calculation, storing this in memory, and further displaying this as a video,
First, the same area 5 as the rectangular area 4 circumscribing the position data group 3 of the area 2 specified by the cursor is secured.

Next, in the rectangular area 5, image data is displayed such that the above-mentioned arbitrary area cut out on the memory is developed at the position indicated by the position data group 3.

Problems to be Solved by the Invention However, according to such a method, calculations are required to determine the area required for the position data group for cropping, that is, which data in the image data, and it takes time. .

In addition, each image data must have position data for the cropped area when it is developed as a video, and therefore, even when displaying it, calculations are required to determine the position to be developed, which takes time. 9. Furthermore, there was a problem that data management became complicated.0 In other words, when cutting out an arbitrary area, unlike a rectangular area, it is difficult to determine where in the memory the necessary area data in the image data is stored. Calculations are performed for each line of image data using the position data group designated by the cursor and the read image data. In addition, the resulting image data of an arbitrary area has a different number of data for each line, and it is necessary for each line and each image data to have position data when developed as a video. For this reason, the above-mentioned problem has arisen.

The present invention has been made in view of the above-mentioned problems, and it allows each line and each image data of an arbitrary area of image data to be cut out without having position data when converting it into an image. It is an object of the present invention to provide a method for cutting out an arbitrary region of an image, which can shorten time and simplify image data and position data of an arbitrary region.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention displays read image data on a display section, inputs position data of an arbitrary area using a cursor, and displays a group of the position data and its position data. This system has a configuration in which an area of the same size as a rectangular area circumscribing an arbitrary area is secured, and image data of the arbitrary area is cut out on the rectangular area.

According to the above-described structure, a rectangular area having the same size as a rectangular area circumscribing an arbitrary area surrounded by a group of cursor position data in read image data is secured in the memory. , an area having the same shape as the arbitrary area based on the position data group is drawn in black in the rectangular area on the memory. A logical product (AND) is performed between the rectangular area including the area filled with black and the rectangular area circumscribing the area.
Arithmetic processing is performed, and the results are transferred to a rectangular area on the memory. As a result, only an arbitrary region can be obtained in the rectangular region, and it is sufficient to cut out the same rectangular region as the rectangular region, so that time can be shortened.

Embodiment FIG. 1 is a schematic block diagram showing an embodiment of a region extraction system suitable for implementing the image arbitrary region extraction method according to the present invention.

In FIG. 1, 11 is a reading unit (scanner) that reads an image as image data; 12 is a memory that stores image data read by the reading unit 11, image data to be cut out, etc.;
13 is a display unit that displays the read image data etc. as a video; 14 is an input unit for position data (displacement of the cursor on the display unit 13) specifying an arbitrary area; and 15 is the entire group. The person who controlled the
This is a control unit (CPU) that performs logical operation processing and image data processing with the memory 12.

Next, a flowchart for explaining the operation shown in FIG. 2 (STI to ST
6 indicates each step. ) will be explained below.

First, image data is captured by the reading section 11 (see Fig. 1) (ST1), and this is displayed on the display section 13 (ST
2).

Next, as shown in FIG.
7, enter the necessary points (position data) in the input section 14.
(See Figure 1)
ST3). In other words, the specified cursor position data group 18 surrounds an arbitrary area to be cut out.

Here, an example of a surrounded arbitrary area in the image data 16 is shown in FIG.

In FIG. 4, 19 is an arbitrary area surrounded by
Furthermore, the dotted rectangular area in the image data 16 is a rectangular area that circumscribes the arbitrary area 19 determined previously.

A rectangular area 21 of the same size as the rectangular area tube is stored in the memory 1.
2 (see Fig. 1), calculate a region n having the same shape as the arbitrary region 19 based on the previous position data group within the rectangular region 21, and calculate that region (arbitrary region) 22. Draw in black n (Sr1).

Here, filling the arbitrary area n with black color n only requires checking whether the arbitrary area B is inside or outside the arbitrary area B, compared to cutting out an arbitrary area as shown in the conventional example. Since it is smaller than the area of data 16, the number of checks is reduced, resulting in the effect that extraction can be performed in a much shorter time.

In filling the arbitrary area n with black color n, a logical AND calculation process is performed between the rectangular area 21 and the rectangular area addition in the image data 16 (Sr5). In other words,
Of the image data of both rectangular areas and 21, only black data is filled in the area n as black color n.

Here, the logical product operation between the two rectangular areas 21 does not require complicated calculations as in the case of determining an arbitrary area in the conventional example, and data transfer also requires DMA between memories. (DirectMemory Acc
ess) transfer, etc. can be applied, and overall faster processing can be performed. This makes it possible to cut out any necessary area in a short time (Sr1).

Furthermore, since the cut out area is saved as the rectangular area 21, it can be transferred as is to the display unit 13 even when displaying it as an image.

When saving as data, a rectangular area that is image data and a region cut out by a group of position data within the rectangular area can be managed, and the structure of the data of an arbitrary area can be simplified.

Effects of the Invention As is clear from the above explanation, the present invention secures a rectangular area of the same size as the rectangular area circumscribing an arbitrary area in the read image data, and includes a rectangular area with the same shape as the arbitrary area in the area. The area is filled with black and a logical AND operation is performed between the arbitrary area in the image data and the circumscribed rectangular area, so the arbitrary area can be cut out at high speed, and the cut out arbitrary area can be converted into a rectangular area. Since it can be handled as an area, it has the effect of simplifying display and data management.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing an embodiment of an area extraction system for implementing the image arbitrary area extraction method according to the present invention, and FIG. 2 is a flowchart illustrating the operation of the method of the present invention. FIG. 3 is a conceptual diagram showing an example of the procedure for specifying an arbitrary area in the image data displayed on the display unit;
The figure is a conceptual diagram showing an example of region extraction according to the present invention.
FIG. 5 is a conceptual diagram showing an example of conventional region extraction.
11... Image reading section, 12... Memory, 13...
Display section, 14... Input section, 15... Control section (CPU
). Name of agent: Patent attorney Toshio Nakao and one other person Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] Displaying the image data read by the reading unit on the display unit, surrounding an arbitrary area in the displayed image data with a group of cursor position data, and a first area (rectangular area) circumscribing the surrounded arbitrary area. A second area (rectangular area) with the same size as is secured in the memory, and an area having the same shape as the arbitrary area is found and drawn within the secured second area, and the first area and the second area are A method for cutting out an arbitrary region of an image, characterized in that image data of an arbitrary region is cut out on the second region by performing logical operation processing between the regions.