Method of Visualizing a Large Still Picture on a Small-Size Display

• US 20080151336A1
• Filed: 02/09/2005
• Published: 06/26/2008
• Est. Priority Date: 02/17/2004
• Status: Active Grant

• Current Assignee: III Holdings 6, LLC
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Gentric, Philippe
• Granted Patent: US 7,936,936 B2
• Time in Patent Office: Days
• US Class Current: 358/528
• CPC Class Codes: H04N 1/00307 with a mobile telephone apparatus constructional features of portable telephone sets H04M1/0202; mobile radio systems H04W84/00
• CPC Class Codes: H04N 19/40 using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 21/234336 by media transcoding, e.g. video is transformed into a slideshow of still pictures or audio is converted into text
• CPC Class Codes: H04N 21/234363 by altering the spatial resolution, e.g. for clients with a lower screen resolution
• CPC Class Codes: H04N 21/25825 involving client display capabilities, e.g. screen resolution of a mobile phone optimising the visualisation of content during browsing in the Internet G06F16/9577; processing of terminal status or physical abilities in wireless networks H04W8/22; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/8153 comprising still images, e.g. texture, background image
• CPC Class Codes: H04N 2201/33328 Resolution

Abstract

The present invention relates to a method of visualizing a large still picture on a display having a size smaller than the large still picture, said method comprising the steps of dividing the large still picture into a set of pieces, said pieces having a size substantially equal to the display size; ranking the pieces of the large still picture according to a predetermined scanning order; and encoding the set of pieces using a predictive block-based compression technique according to said predetermined scanning order so as to obtain a video sequence.

Claims

1. A method of processing a large still picture so as to visualize it on a display having a size smaller than the large still picture, said method comprising the steps of:

dividing the large still picture into a set of pieces, said pieces having a size substantially equal to the display size,

ranking the pieces of the large still picture according to a predetermined scanning order,

encoding the set of pieces using a predictive block-based compression technique according to said predetermined scanning order so as to obtain a video sequence, and

decoding and displaying the video sequence on the display.

2. A method as claimed in claim 1, wherein the pieces of the large still picture overlap each other and wherein the dividing and ranking steps are based on a traveling shot adapted to cover at least a part of the large still picture.

3. A method as claimed in claim 1, further comprising a step of detecting contours within the large still picture.

4. A method as claimed in claim 3, wherein the dividing and ranking steps are based on a continuous scanning of the contours detected by the step of detecting contours.

5. A method as claimed in any one of claims 1, further comprising a step of zooming a part of the large still picture.

7. A computer program product comprising program instructions for implementing, when said program is executed by a processor, a method as claimed in claim 1.

6. A device for processing a large still picture so as to visualize it on a display having a size smaller than the large still picture, said device comprising:

said display,

means for dividing the large still picture into a set of pieces, said pieces having a size substantially equal to the display size,

means for ranking the pieces of the large still picture according to a predetermined scanning order,

an encoder for encoding the set of pieces using a predictive block-based compression technique according to said predetermined scanning order so as to obtain a video sequence, and

a decoder for decoding and displaying the video sequence on the display.