Method and system for client-less viewing of scalable documents

• US 6,874,131 B2
• Filed: 07/02/2002
• Issued: 03/29/2005
• Est. Priority Date: 12/23/1998
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Blumberg, Robert
• Primary Examiner(s): Thompson, Marc D.
• Assistant Examiner(s): Prieto, Beatriz
• Application Number:
  US10/191,867
• Publication Number:
  US 20020194302A1
• Time in Patent Office: 1,001 Days
• Field of Search: 709/201, 709/203, 709/217, 709/218, 709/219, 715/510, 715/511, 715/512, 715/513, 715/522, 715/907, 715/708, 382/148, 382/299, 382/302, 382/303, 382/304, 382/305
• US Class Current: 715/205
• CPC Class Codes: G06F 16/9577 Optimising the visualization of content, e.g. distillation of HTML documents
• CPC Class Codes: G06F 16/986 Document structures and storage, e.g. HTML extensions

Abstract

A method and system for viewing a document containing at least one page and at least one image, the document being located on a server computer, including sending by a client computer a page display request to the server computer creating by the server computer a layout page containing a reference to stored image data, transmitting the layout page from the server computer to the client computer, sending an image data to a remote computer according to the reference to stored image data, and transmitting requested image data from the remote computer to the client computer in response to the image data request.

Claims

1. A method for on-line accessing of client-selected scaled versions of one particular original document containing at least one page containing content other than an image and at least one high resolution raster graphics image in non-scalable PDF format, the one particular original document being located on a server computer, the method comprising the operations of:

sending by a client computer a page access request to the server computer;

creating by a rendition tool at the server computer a scalable document from an original document file located on the server computer, the original document file representing the one particular original document, the scalable viewable document containing the content other than the image and not containing the high resolution raster graphics image in non-scalable PDF format and containing a reference to stored image data;

storing the high resolution raster graphics image in non-scalable format as the stored image data, the stored image data representing the one particular original document;

transmitting the scalable viewable document from the server computer to the client computer;

sending by the client computer an image data request to the server computer to access a client-selected scaled version of the stored image data representing the one particular original document; and

transmitting the requested client-selected scaled version of the stored image data from the server computer to the client computer in response to the image data request.

2. The method as recited in claim 1, further comprising the operation of:

reversing the operations of the rendition tool to complete the accessing of the one particular original document located on the server computer, the reversing being by composing the client-selected scaled document based on the one particular original document, the composing replacing the original high resolution raster graphics image in non-scalable PDF format that was contained in the one particular original document with image data representing the client-selected scaled version in non-scalable format, the client-selected scaled version being scaled at an appropriate resolution for access by a client-selected one of a view operation, a print operation, and a save operation.

3. The method as recited in claim 1 wherein the reference to stored image data is a URL.

4. The method as recited in claim 1 wherein the image data request contains a command specifying a rectangular portion of a raster image and a display width and height.

5. The method as recited in claim 4 wherein the command specifying a rectangular portion of a raster image and a display width and height is a CVT command from an Internet Imaging Protocol.

6. The method as recited in claim 1 wherein the image data request by the client computer comprises resolution independent coordinates defining the location of a corner of a rectangle and defining the height and width of the rectangle represented as respective percentages of the respective total height and width of the original high resolution raster graphics image in non-scalable PDF format.

7. The method as recited in claim 1 wherein:

the image data request further comprises an identification of any resolution that is appropriate for a client computer operation taken from the group consisting of viewing, printing, and saving the original document; and

the page access request enables the accessing at the client computer of the one particular original document having the resolution appropriate for the viewing, saving or printing of the client-selected scaled version of the one particular original document.

8. The method as recited in claim 1 wherein:

the page access request is to enable the viewing at a screen of the client computer of the one particular original document by viewing the entire high resolution raster graphics image scaled to a size of the screen, and

the image data request is defined by a continuous two-dimensional coordinate system with coordinates x and y ranging over the rectangle that is normalized as a unit, defined by 0 <

x<

1, 0<

y<

1, wherein the rectangle corresponds to the screen when x and y both equal zero and each of a height value and a width value equals 1.

9. The method as recited in claim 8 wherein:

the image data request is to view a portion of the entire high resolution raster graphics image, and the portion may be selected from any location of the screen by designating a value of each of the x and y coordinates between zero and one and designating the height value and the width value, each between zero and one.

10. The method of claim 1 wherein the image data request identifies a rectangular portion of the original high resolution raster image to be accessed and a designated resolution.

11. The method of claim 10 comprising the operations of:

repeating the sending operation to request different client-selected scaled versions of the stored image data resulting from the one particular original document, scalability of the different versions being obtained by one or both of appropriate client-initiated changes in the rectangular portion and the designated resolution.

12. The method as recited in claim 1 wherein:

the operation of transmitting the requested client-selected scaled version of the stored image data comprises producing at the server computer the client-selected scaled version of the one particular original document from the content other than an image and from the stored high resolution raster graphics image in non-scalable PDF format, and the method further comprising the operation of;

displaying the client-selected version of the one particular original document containing the content other than the image and containing the client-selected scaled version of the requested stored image data.

13. A method for on-line viewing of client-selected scaled versions of one particular original document containing at least one page containing content other than an image and at least one high resolution raster graphics image in non-scalable PDF format, the one particular original document being located on a server computer, the method comprising the operations of:

sending by a client computer a page access request to the server computer;

creating by a rendition tool at the server computer a scalable viewable document from an original document file located on the server computer, the original document file representing the one particular original document, the scalable viewable document containing the content other than the image and not containing the high resolution raster graphics image in non-scalable PDF format and containing a reference to stored image data of the one particular original document;

storing the high resolution raster graphics image in non-scalable format as the stored image data of the one particular original document;

transmitting the scalable viewable document from the server computer to the client computer;

sending by the client computer an image data request to the server computer to access a client-selected scaled version of the stored image data of the one particular original document, the image data request comprising image processing commands;

processing the image data commands at the server computer to produce the client-selected scaled version of the stored image data of the one particular original document; and

transmitting the requested client-selected scaled version of the stored image data of the one particular original document from the server computer to the client computer in response to the image data request.

14. The method of claim 13, comprising the further operations of:

sending by the client computer a next image data request to the server computer to access another client-selected scaled version of the stored image data of the one particular original document, the next image data request comprising next image processing commands;

processing the next image data commands at the server computer to produce a next client-selected scaled version of the stored image data of the one particular original document;

repeating the sending operation to request the next client-selected scaled version of the stored image data of the one particular original document, scalability of the next client-selected scaled version being obtained by one or both of appropriate client-initiated changes in the rectangular portion and the designated resolution.

15. The method of claim 13, comprising the further operations of:

repeating the reversing of the operations of the rendition tool to complete the accessing of the one particular original document located on the server computer by composing a next scaled viewable document based on the one particular original document, the repeated composing replacing the original high resolution raster graphics image in non-scalable PDF format that was contained in the one particular original document with the image data representing the next client-selected raster version of the graphics image in non-scalable format of the one particular original document, the next client-selected scaled version being scaled at an appropriate resolution for access by a client-selected view operation.

16. A method for viewing of a client-selected scaled version of one particular original document on a low resolution screen of a client document viewing computer in a system with a document server computer, the one particular original document containing high resolution raster graphics images in non-scalable PDF format and scalable content other than an image, the method comprising the operations of:

sending by a client computer a document viewing request to the document server computer which is storing the one particular original document to be viewed;

extracting data from the one particular original document to form a scalable document that does not contain the high resolution raster graphics image, the scalable document containing the scalable content and a reference to the high resolution raster graphics image from the one particular original document;

storing on the document server computer as stored image data, the high resolution raster graphics image in non-scalable PDF format extracted from the one particular original document;

receiving at the client computer the scalable document from the document server computer in response to the document viewing request;

sending by the client computer a client-selected image data request to the document server computer, the client-selected image data request being modeled by a continuous two-dimensional coordinate system with coordinates x and y ranging over a rectangular view region and having any value from zero to one, wherein a zero value represents an edge of the low resolution screen, wherein a one value represents a value of an entire dimension of the low resolution screen in a respective direction of the x or y coordinate, wherein a value between zero and one of each of the coordinates represents any location on the low resolution screen at which a top-left corner of the rectangular view region is located, the image data request also comprising a width value and a height value representing respective values of the size of the rectangular view region in the respective directions of the x and y coordinates referenced to the top-left corner, the client-selected image data request further comprising client-selected ones of the values for the x and y coordinates and client-selected values of the width value and the height value, the client-selected image data request further comprising a pair of discrete pixel dimensions representing the height and width of a pixel array;

receiving at the client computer image data from the image server computer in response to the client-selected image data request, the image data relating to the one particular original document and conforming to the client-selected image data request by comprising data representing the values of the x and y coordinates specifying the location of the top-left corner of the rectangular view region and representing the width value and the height value of the rectangular view region, the image data further comprising data identifying the size in pixels of the client-selected version on the low resolution screen; and

by a delivery tool substituting the image data for the reference to the high resolution raster graphics image of the one particular original document, the substituted image data converting the scalable document to the client-selected version of the one particular original document for viewing on the low resolution screen at the client computer.