Interactive desktop display system for automatically adjusting pan and zoom functions in response to user adjustment of a feedback image

An article of manufacture for use with an interactive desktop system, the interactive desktop system including a processor system, an image capture system, and a display system, the image capture system capturing a captured image in a field of view of the image capture system, the captured image including an image of a portion of a source document, the image capture system having electronically controllable pan and zoom functions for adjusting the field of view, the display system displaying a feedback image on the source document, the feedback image indicating to a user the captured image, the feedback image being visible to the image capture system, the processor system being coupled to the image capture system and the display system, the article of manufacture comprising:

• a) a memory;
• b) instructions stored in the memory in machine form readable by the processor system, the instructions causing the processor system to respond to a user adjustment of the feedback image by adjusting at least a one of the pan function and the zoom function, the instructions comprising the steps of:
• 1) capturing a first image in the field of view of the image capture system while the feedback image is being displayed on the source document;
• 2) capturing a second image in the field of view of the image capture system while the feedback image is not being displayed on the source document;
• 3) generating a difference image from the first image and the second image;
• 4) searching for the feedback image in the difference image;
• and
• 5) when the feedback image is found in the difference image adjusting at least a one of the pan and zoom controls of the image capture to center the feedback image within the difference image.

A method of scanning relevant portions of a source document with an image capture system, comprising the steps of:

• 1) capturing a first image in a field of view of the image capture system while a feedback image is being displayed on the source document;
• 2) capturing a second image in the field of view of the image capture system while the feedback image is not being displayed on the source document;
• 3) generating a difference image from the first image and the second image;
• 4) searching for the feedback image in the difference image;
• and
• 5) when the feedback image is found in the difference image adjusting at least a one of the pan and zoom controls of the image capture to center the feedback image within the difference image.