JPH02259884A - Image processing system - Google Patents

Abstract

PURPOSE:To obtain satisfactory rotation by one time of operation and to improve operability by defining an angle, which is made by a line segment connecting two points and a reference direction determined in advance, as a rotational angle. CONSTITUTION:An image is read by an image reader 11 and image data are developed on a picture memory 12. Then, a picture is displayed by an image display means 21. Next, when a point P1 is designated as a rotary axis and a point P2 is designated as the other point by a mouse 23, a rotational angle calculating means 14 calculates an angle A made by a line segment L, which connects the points P1 and P2, and a Y direction. An editing means 13 executes rotation processing according to the calculated angle A and the point P1 and the picture display of the image data, to which the rotation processing is executed, is executed. Thus, the satisfactory rotation can be obtained by one time of operation without repeating the rotation processing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application 1] The present invention relates to an image processing system capable of rotation processing of rotating image data.

[Prior Art] FIG. 7 is a flowchart showing the operation of rotation processing in a conventional example of an image processing system.

First, an image is read using an image reader such as a scanner (step 51). Develop image data representing the read image on the image memory (step 52)
. Display the expanded image data on the screen (Step 5)
3). A point on the screen is designated as the rotation axis (step 54).

Further, the rotation angle is indicated numerically (step 55). Performs rotation processing using the specified rotation axis and rotation angle (
Step 56). Rotation processing is performed and image data is displayed on the screen (step 57). Judging the result of rotation processing (
Step 58), if satisfied, ends; if not, returns to step 54, and repeats the processes from step 54 to step 57 until a satisfactory rotation is obtained.

[Problem to be solved by the invention] In the conventional image processing system described above, the rotation angle is specified numerically, so it is difficult to express delicate angles numerically, and as a result, it is difficult to express the rotation angle numerically. The drawback is that satisfactory rotation is often not obtained unless the same process is repeated.

[Means to solve the problem]

An image processing system of the present invention is an image processing system capable of rotation processing of rotating image data, and includes an instruction means for indicating a point on a screen, and when two points on the screen are specified by the instruction means, the instruction is performed. The rotation angle calculation means calculates the angle between a line segment connecting the two points and a reference direction predetermined on the screen, and uses the calculated angle as the rotation angle during the rotation process.

[Function] Since the rotation angle is set to the angle between the line segment connecting the two points and the predetermined reference direction, the line segment connecting the two points faces the reference direction after the rotation process.

[Example] Next, an example of the present invention will be described with reference to the drawings.

Fig. 1 is a system configuration diagram showing one embodiment of the image processing system of the present invention, Fig. 2 is a flowchart showing the rotation processing work according to this embodiment, and Fig. 3 is an explanation showing an image before rotation processing. Figure 4 is an explanatory diagram showing the image after the rotation process, and the image memory 12 before the fifth rotation process.
FIG. 6 is an explanatory diagram showing the dot pattern on the image memory 12 after rotation processing.

As shown in FIG. 1, the image processing system l of this embodiment includes an image reader 11, an image memory 12, an editing means 13, a rotation angle calculation means 14, a control means 15, a human power interface 16, a human output interface 17, and an image processing system. It is composed of a display means 21, a keyboard 22, a mouse 23, and external storage means 24 and 25.

The image reader 11 is a scanner that reads images, and outputs image data representing the read images. The image memory 12 receives the image data output by the image reader 11 via the input interface 16, and the 0m collection means 13 for storing the received image data stores the image data stored in the image memory 12. Perform the rotation process according to the instructions. When two points in the image data stored in the image memory 12 are specified, the rotation angle calculating means 14 calculates the direction between the line segment connecting the specified two points and the reference direction in the vertical direction on the screen, that is, the arrow. The angle with the Y direction is calculated using trigonometric functions, and the calculated angle is instructed to the editing means 13 as the rotation angle. The control means 15 controls the exchange of data within the image processing system 1 . The image display means 21 includes an image memory 12
Displays the stored image data on the screen.

The keyboard 22 and mouse 23 are used to input instructions from the operator. In particular, the mouse 23 is used as an indicating means for indicating two points in the image data. External storage means 2
4.25 stores seed rod data used in the image processing system 1, including image data.

Next, the processing operations of this embodiment will be explained.

First, an image is read from the image reader 11 (step 41). Image data representing the read image is developed on the image memory 12 (step 42). The expanded image data is displayed on the third image display means 21.
As shown in the figure, the screen is displayed (step 43). Point P1 is designated as the rotation axis using the mouse 23 (step 44). Also, specify point P2 as another point (
Step 45). The rotation angle calculating means 14 calculates the points PL, P
2 and the Y direction, and the editing means 13 performs rotation processing using the calculated angle A and point P1 (step 46). The rotated image data is displayed on the screen as shown in FIG. 4 (step 47).
).

As described above, as shown in FIG. 2, a satisfactory rotation can be obtained in one operation without repeating the rotation process, compared to the conventional operation shown in FIG.

In this embodiment, the vertical direction is used as the reference direction, but other directions such as the horizontal direction may be used as the reference direction.

Note that the rotation process has the following advantages.

For example, if a horizontal straight line on a document is developed diagonally on the image memory, it will be developed into a dot pattern as shown in Figure 5 and will no longer be a straight line, and the image data will not be compressed and encoded as it is. In some cases, compression efficiency deteriorates. Therefore, if the display angle is corrected by rotating the image data on the image memory, a dot pattern as shown in FIG. 6 will be obtained, and such a correct horizontal straight line will improve efficiency in compression encoding. A good compression ratio means that the absolute amount of data can be reduced, and if the data is small, the transfer time can be shortened.
It is expected that the performance of the entire system will be improved.

[Effects of the Invention] As explained above, the present invention provides a rotation angle that is the angle between a line segment connecting two points and a predetermined reference direction. It has the effect of improving

[Brief explanation of drawings]

Fig. 1 is a system configuration diagram showing an embodiment of the image processing system of the present invention, Fig. 2 is a flowchart showing the rotation processing operation according to this embodiment, and Fig. 3 is an explanation showing an image before rotation processing. Figure 4 is an explanatory diagram showing the image after the rotation process, Figure 5 is an explanatory diagram showing the dot pattern on the image memory 12 before the rotation process, and Figure 6 is an explanatory diagram showing the image after the rotation process. FIG. 7 is an explanatory diagram showing the dot pattern of the image memory 12, and FIG. 7 is a flowchart showing the operation of rotation processing in a conventional example of the image processing system. DESCRIPTION OF SYMBOLS 1... Image processing system 11... Image reader, 12... Image memory, 13... Editing means, 14... Rotation angle calculation means, 15... Control means , 16... Input interface, 17... Input/output interface 21... Image display means, 22... Keyboard, 23... Mouse 24, 25... External storage means .

Claims (1)

[Claims] 1. An image processing system capable of rotation processing of rotating image data, comprising: an instruction means for indicating a point on a screen; and when two points on the screen are indicated by the instruction means, and a rotation angle calculation means that calculates the angle between a line segment connecting the two points and a reference direction predetermined on the screen, and uses the calculated angle as the rotation angle during the rotation process. Image processing system.