Patent ID: 9256180
Filing Date: 2016-02-09
CPC Classification: G03G,G06T

Claim Text:
1. An image display apparatus comprising: a storage portion to store application data and reduced image data obtained by reducing an image of said application data, in association with each other; a display portion to display a preview image; a position detection portion to detect a position designated by the user on a display surface of said display portion; an enlargement operation detection portion to detect an enlargement operation of giving an instruction to enlarge a preview image when two different positions are detected simultaneously by said position detection portion and a distance between the two positions continuously detected by said position detection portion is changed over time; a first image display portion to display a first display image generated from said reduced image data as said preview image on said display portion; a process target determination portion to determine the amount of operation of the enlargement operation based on the amount of change in said distance between the two positions detected by said enlargement operation detection portion, and to determine process target data from said reduced image data and said application data associated with said reduced image data, based on a magnification set by said amount of operation; a second display image generation portion to generate a second display image based on said determined process target data, in response to said enlargement operation being detected; and a second image display portion to display said generated second display image as said preview image on said display portion, wherein if the magnification set by said amount of operation is greater than a first threshold value and is equal to or smaller than a second threshold value greater than the first threshold value, said process target determination portion further determines said application data as process target data for a region of interest and determines said reduced image data as process target data for a peripheral region excluding said region of interest of an image of said process target data; and if the magnification set by said amount of operation is greater than the second threshold value, said process target determination portion determines said application data as process target data.