APPARATUS AND METHOD FOR DISPLAYING ZOOMED VERSION OF STORED IMAGE BY DISPLAYING AND SHIFTING ABSED ON PIXEL OVERLAP
First Claim
1. A method of displaying a zoomed version of stored image on a display, where the stored image is defined by a set of data entries mapped to respective pixels of the display, the method comprising the steps of:
- (1) scaling the stored image relative to the display in accordance with a desired zooming ratio;
(2) locating the scaled image at an initial position relative to the display;
(3) determining the extent to which each display pixel is overlapped by features of the scaled image, and assigning to each display pixel a corresponding colour tone;
(4) shifting the scaled image relative to said initial position one or more times and, for the or each shift, repeating step; and
(5) cyclically displaying each of the sets of assigned colour tones in turn for as long as the zoomed version is to be displayed.
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Accused Products
Abstract
A method of displaying a zoomed version of stored image on a display, where the stored image is defined by a set of data entries mapped to respective pixels of the display. The stored image is first scaled relative to the display in accordance with the desired zooming ratio. The scaled image is then located at an initial position relative to the display and the extent to which each display pixel is overlapped by features of the scaled image is determined. A colour tone is assigned to each display pixel in accordance with the extent of the overlap. The scaled image is then shifted relative to said initial position one or more times and, for the or each shift, the overlap of each display pixel is recalculated and a new colour tone assigned. The sets of assigned colour tones are then displayed cyclically on the display to produce a displayed image.
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Citations
10 Claims
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1. A method of displaying a zoomed version of stored image on a display, where the stored image is defined by a set of data entries mapped to respective pixels of the display, the method comprising the steps of:
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(1) scaling the stored image relative to the display in accordance with a desired zooming ratio;
(2) locating the scaled image at an initial position relative to the display;
(3) determining the extent to which each display pixel is overlapped by features of the scaled image, and assigning to each display pixel a corresponding colour tone;
(4) shifting the scaled image relative to said initial position one or more times and, for the or each shift, repeating step; and
(5) cyclically displaying each of the sets of assigned colour tones in turn for as long as the zoomed version is to be displayed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for displaying a zoomed version of a stored image, the apparatus comprising a display having a matrix of display pixels, a memory for storing an image as a set of data entries mapped to said display pixels, and processing means arranged to:
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scale the stored image relative to the display in accordance with a desired zooming ratio;
locate the scaled image at a first position relative to the display;
determine the extent to which each display pixel is overlapped by the scaled image and to assign to each display pixel a corresponding colour tone;
shift the scaled image relative to the display one or more times and repeat the steps of determining and displaying for each shift; and
cyclically display each of the sets of assigned colour tones in turn for as long as the zoomed version is to be displayed.
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Specification