David H Chick

US Patent:

7466875, Dec 16, 2008

Filed:

Mar 1, 2004

Appl. No.:

10/790256

Inventors:

Hilliard Siegel - Seattle WA, US
David Chick - Seattle WA, US

Assignee:

Amazon Technologies, Inc. - Incline Village NV

International Classification:

G06K 9/36

US Classification:

382286, 382299, 382309, 358 12, 358537, 358462

Abstract:

Legibility of text in an image of a page is determined by comparing a measure of the text in the page image with a measure of the page image itself. In one aspect, a measure of the text in the page image may be the height of a line of text, while the measure derived from the page image may be the height of the page image. A text-to-page height ratio is determined and compared to one or more thresholds for determining legibility. In another aspect of the invention, a measure of the text in a page image is obtained by measuring the word density in the page image, while the measure derived from the page image comprises compressing the page image and determining the size of the compressed image file. Legibility is then determined by comparing the measure of word density with the compressed image file size.

US Patent:

7778489, Aug 17, 2010

Filed:

Nov 6, 2008

Appl. No.:

12/266444

Inventors:

Hilliard B. Siegel - Seattle WA, US
David Chick - Seattle WA, US

Assignee:

Amazon Technologies, Inc. - Reno NV

International Classification:

G06K 9/36

US Classification:

382286, 382299, 358 12, 358452

Abstract:

Legibility of text in an image of a page is determined by comparing a measure of the text in the page image with a measure of the page image itself. In one aspect, a measure of the text in the page image may be the height of a line of text, while the measure derived from the page image may be the height of the page image. A text-to-page height ratio is determined and compared to one or more thresholds for determining legibility. In another aspect of the invention, a measure of the text in a page image is obtained by measuring the word density in the page image, while the measure derived from the page image comprises compressing the page image and determining the size of the compressed image file. Legibility is then determined by comparing the measure of word density with the compressed image file size.