US 8,570,346 B2Granted

Image display control apparatus and image display control method

AssigneeCanon Kabushiki Kaisha

InventorChiaki Mikawa

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Abstract

At the time of switching an image to be displayed from a first image to a second image with different number of recording pixels with the display scale fixed, display is controlled such that of a partial range displayed in a display region of the image, a relative position of a point farthest from the center of the first image, as to the first image, and of a partial range displayed in a display region of the second image, the relative position of a point corresponding to the farthest point in the first image, as to the second image, are equal. Corresponding ranges between images before and after switching therebetween can be displayed with the display scale fixed, such that the probability of the displayed region extending outside of the entire image is reduced and comparison of images is facilitated.

Claims20

Dependent claims

An image display control apparatus comprising:

a display control unit configured to display a part of an entire image on a display region on a display apparatus;
a switching unit configured to switch a part of an entire image displayed in the display region from a part of an entire first image to a part of an entire second image, the entire first image and the entire second image having a different number of recording pixels, with a display scale which is a ratio of a number of recording pixels of an entire image and a number of pixels on the display apparatus available for displaying the entire image is fixed;
a reference point determining unit configured to determine, from the part of the entire first image displayed in the display region, a reference point, based on a side or point farthest from a center of the entire first image in a horizontal direction, and a side or point farthest from the center of the entire first image in a vertical direction, even when the point farthest from the center of the entire first image in a part of the entire first image displayed in the display region is not a point of an upper left of the part of the entire first image;
a storage control unit configured to affect control such that relative position information indicating a relative position of the reference point as to the entire first image is stored;
and
a display part determining unit configured to determine the part of an entire second image displayed in the display region, such that a relative position of a point in a part of an entire second image displayed in the display region which corresponds to the reference point in the first entire image, as to the entire second image, is of a relative position which the relative position information indicates.

3 more elements

An image display control apparatus comprising:

a display control unit configured to display a part of an entire image on a display region on a display apparatus;
a switching unit configured to switch a part of an entire image displayed in the display region from a part of an entire first image to a part of an entire second image, the entire first image and the entire second image having a different number of recording pixels, with a display scale which is a ratio of a number of recording pixels of an entire image and a number of pixels on the display apparatus used for displaying the entire image is fixed;
a storage unit configured to determine a reference point based on a portion in the entire first image which is farther from a center of the entire first image in a horizontal direction than a point other than a corner or center portion of a part displayed in the display region in the entire first image that is the farthest from the center of the entire first image in the horizontal direction, and a portion in the entire first image which is farther from a center of the entire first image in a vertical direction than a point other than a corner or center portion of a part displayed in the display region in the entire first image that is the farthest from the center of the entire first image in the vertical direction, even when the point farthest from the center of the entire first image in a part of the entire first image displayed in the display region is not a point of an upper left of the part of the entire first image, and store relative position information indicating the relative position of the reference point as to the entire first image;
and
a display part determining unit configured to determine the part of an entire second image displayed in the display region, such that the relative position of a point in a part of an entire second image displayed in the display region, corresponding to the reference point which the relative position information indicates, as to the entire second image, is a relative position indicated by the relative position information.

2 more elements

An image display control method comprising:

displaying a part of an entire image on a display region on a display apparatus;
switching a part of an entire image displayed in the display region from a part of an entire first image to a part of an entire second image, the entire first image and the entire second image having a different number of recording pixels, with a display scale which is a ratio of a number of recording pixels of an entire image and a number of pixels on the display apparatus used for displaying the entire image is fixed;
determining a reference point based on a portion in the entire first image which is farther from a center of the entire first image in a horizontal direction than a point other than a corner or center portion of a part displayed in the display region in the entire first image that is the farthest from the center of the entire first image in the horizontal direction, and a portion in the entire first image which is farther from a center of the entire first image in a vertical direction than a point other than a corner or center portion of a part displayed in the display region in the entire first image that is the farthest from the center of the entire first image in the vertical direction, even when the point farthest from the center of the entire first image in a part of the entire first image displayed in the display region is not a point of an upper left of the part of the entire first image, and storing relative position information indicating the relative position of the reference point as to the entire first image;
and
determining the part of an entire second image displayed in the display region, such that the relative position of a point in a part of an entire second image displayed in the display region, corresponding to the reference point which the relative position information indicates, as to the entire second image, is a relative position indicated by the relative position information.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/205,365Filed 5 Sep 2008
Priority: JP 2007-2314996 Sep 2007
Published: US 2009/0066730 A112 Mar 2009
Granted: 29 Oct 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06T 3/40
Geometric image transformations in the plane of the image: scaling of whole images or parts thereof, e.g. expanding or contracting
G09G 2340/0414
Resolution change, inclusive of the use of different resolutions for different screen areas: vertical resolution change
G09G 2340/0421
Resolution change, inclusive of the use of different resolutions for different screen areas: horizontal resolution change
G06T
Image data processing or generation, in general

Family

US 2009/0066730 A1Pre-grant publication · published 12 Mar 2009
US 8,570,346 B2This patent

From the US filing history. Foreign family members aren’t listed.

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