ELECTRONIC DEVICE WHICH RENDERS GRAPH, GRAPH DISPLAY METHOD AND RECORDING MEDIUM IN WHICH GRAPH RENDERING PROGRAM IS RECORDED

• US 20120242690A1
• Filed: 03/22/2012
• Published: 09/27/2012
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: YAMAGUCHI, Hiromi
• Granted Patent: US 8,791,959 B2
• Time in Patent Office: Days
• US Class Current: 345/629
• CPC Class Codes: G06F 15/02 manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
• CPC Class Codes: G06F 15/0216 Constructional details or arrangements

Abstract

Disclosed is an electronic device including a display which displays an image, a graph graphic detection unit which detects a graph graphic matching any of predetermined graph shapes in the image, a graph rendering unit which renders a graph overlapping the graph graphic, a length input line segment designation unit which designates any one of line segments included in the image as a line segment subject to length input, a line segment length input unit which inputs a length of the line segment subject to length input, a point of origin setting unit which sets a point of origin of a coordinate system, a display range calculation unit which calculates a display range of the coordinate system, and a graph equation calculation unit which calculates a graph equation of the graph and displays a calculation result in the display.

Claims

1. An electronic device, comprising:

a display which displays an image;

a graph graphic detection unit which detects a graph graphic matching any of predetermined graph shapes in the image;

a graph rendering unit which renders a graph overlapping the graph graphic which is detected by the graph graphic detection unit;

a length input line segment designation unit which designates any one of line segments included in the image as a line segment subject to length input based on a user'"'"'s operation;

a line segment length input unit which inputs a length of the line segment subject to length input based on a user'"'"'s operation;

a point of origin setting unit which sets a point of origin of a coordinate system in the image according to a position and a shape of the graph;

a display range calculation unit which calculates a display range of the coordinate system which is to be set so as to superimpose on the image based on the length of the line segment subject to length input; and

a graph equation calculation unit which calculates a graph equation of the graph and displays a calculation result in the display based on the display range.

2. The electronic device as claimed in claim 1, further comprising:

a length calculation line segment designation unit which designates any one of the line segments included in the image as a line segment subject to length calculation based on a user'"'"'s operation; and

a line segment length calculation unit which calculates and displays a length of the line segment subject to length calculation based on the length of the line segment subject to length input.

3. The electronic device claimed in claim 1, wherein

the graph graphic detection unit detects graph graphics matching any of the graph shapes in the image,

the graph rendering unit comprises

a graph graphic selection unit which selects any of the graph graphics from the graph graphics detected by the graph graphic detection unit based on a user'"'"'s operation, and

a selected graphic graph rendering unit which renders graphs overlapping respectively the graph graphics selected by the graph graphic selection unit.

4. The electronic device claimed in claim 1, wherein

the graph graphic detection unit comprises

a graph shape selection unit which selects a graph shape type based on a user'"'"'s operation, and

a selected shape graph graphic detection unit which detects a graph graphic matching the graph graphic selected by the graph shape selection unit in the image.

5. A graph display method performed by a computer comprising a display which displays an image, comprising:

detecting a graph graphic matching any of predetermined graph shapes in the image;

rendering a graph overlapping the graph graphic which is detected in the detecting;

designating any one of line segments included in the image as a line segment subject to length input based on a user'"'"'s operation;

inputting a length of the line segment subject to length input based on a user'"'"'s operation;

setting a point of origin of a coordinate system in the image according to a position and a shape of the graph;

calculating a display range of the coordinate system which is to be set so as to superimpose on the image based on the length of the line segment subject to length input; and

calculating and displaying a graph equation of the graph based on the display range, a calculation result being displayed in the display.

6. A recording medium storing a program which makes a computer comprising a display which displays an image realize functions of:

a graph graphic detection unit which detects a graph graphic matching any of predetermined graph shapes in the image;

a graph rendering unit which renders a graph overlapping the graph graphic which is detected by the graph graphic detection unit;

a length input line segment designation unit which designates any one of line segments included in the image as a line segment subject to length input based on a user'"'"'s operation;

a line segment length input unit which inputs a length of the line segment subject to length input based on a user'"'"'s operation;

a point of origin setting unit which sets a point of origin of a coordinate system in the image according to a position and a shape of the graph;

a display range calculation unit which calculates a display range of the coordinate system which is to be set so as to superimpose on the image based on the length of the line segment subject to length input; and

a graph equation calculation unit which calculates a graph equation of the graph and displays a calculation result in the display based on the display range.