Method for manipulating regions of a digital image

1. A method of selecting and processing a sub-region of a digital image, comprising:

identifying potential region borders based on edge content in the digital image;

receiving border selection input data;

making at least temporarily visible for user selection at least a subset of the potential region borders in response to said received border selection input data;

receiving gesture data selecting a sub-region bounded by ones of user selected visible potential region borders, the gesture data being associated with a processing tool;

automatically launching the processing tool associated with the gesture data; and

processing the sub-region using the processing tool.

2. The method of claim 1 , wherein the gesture data defines a gesture shape that is a closed figure thereby to characterize the shape, size and location of the sub-region.

3. The method of claim 1 , wherein the gesture data defines a gesture shape, the gesture shape associated with a shape of, and defining the size and position of, a closed figure thereby to characterize the sub-region.

4. The method of claim 1 , wherein the gesture data defines a gesture shape, the gesture shape being associated with the processing tool.

5. The method of claim 4 , wherein the gesture shape is a closed figure.

6. The method of claim 1 , wherein the gesture data includes coordinates along the boundaries of the sub-region.

7. The method of claim 1 , wherein said automatically launching a processing tool comprises:

identifying a gesture shape from the gesture data;

searching a processing tool table to determine a processing tool in the processing tool table associated with the identified gesture shape;

automatically launching the processing tool; and

providing the gesture data to the processing tool.

8. The method of claim 7 , wherein identifying the gesture shape comprises:

comparing the gesture data to a plurality of shape templates each representing a unique shape; and

determining which of the shape templates is the most similar to the sub-region thereby to identify the gesture shape.

9. The method of claim 7 , wherein the gesture shape is a rectangle and the processing tool associated with the rectangle in the processing tool table is a zoom tool.

10. The method of claim 7 , wherein the gesture shape is an ellipse and the processing tool associated with the ellipse in the processing tool table is a highlight/spotlight tool.

11. The method of claim 1 , wherein the processing tool is selected from the group consisting of a zoom tool, a cropping tool, a highlighting tool, and a spotlighting tool.

12. The method of claim 1 , wherein processing of the sub-region by the processing tool is controllable by a user.

13. The method of claim 12 , wherein the processing tool is a zoom tool and the magnification level of the zoom tool is further controllable by the user.

14. The method of claim 1 , wherein said identifying comprises:

calculating pixel intensity profiles for each row and column of pixels in the digital image; and

comparing adjacent ones of the pixel intensity profiles to determine where differences between adjacent pixel intensity profiles exceed a threshold level, thereby establishing row and column positions of the potential region borders.

15. The method of claim 1 wherein the at least a subset of the potential region borders is at least temporarily made visible in response to a pointer being swept thereacross.

16. The method of claim 15 wherein each potential region border is at least temporarily made visible when the pointer is within a threshold distance thereof.

17. A non-transitory computer readable medium embodying a computer program for selecting and processing a sub-region of a digital image, the computer program comprising computer program code, which when executed by processing structure, causes a computing device at least to:

identify potential region borders based on edge content in the digital image;

receive border selection input data;

make at least temporarily visible for user selection at least a subset of the potential region borders in response to said received border selection input data;

receive gesture data selecting a sub-region bounded by ones of user selected visible potential region borders, the gesture data being associated with a processing tool;

automatically launch the processing tool associated with the gesture data; and

process the sub-region using the processing tool.

18. An interactive display system comprising:

a touch screen that defines a touch surface on which a computer-generated image is presented;

a sensor assembly detecting pointer contacts on the touch surface and in response, generating border selection input data and gesture data; and

processing structure configured to

identify potential region borders based on edge content in the computer-generated image,

receive border selection input data,

make at least temporarily visible for user selection at least a subset of the potential region borders in response to said received border selection input data;

receive gesture data selecting a sub-region of the computer-generated image bounded by ones of user selected visible potential region borders, the gesture data being associated with a processing tool;

automatically launch the processing tool associated with the gesture data; and

process the sub-region using the processing tool.

19. The system of claim 18 , further comprising:

memory storing a processing tool table associating at least one processing tool with a respective gesture shape;

wherein the processing structure identifies a gesture shape from the gesture data, and selects an associated processing tool from the processing tool table for processing the sub-region.

20. The system of claim 19 , wherein the gesture shape is a rectangle and the processing tool associated with the rectangle in the processing tool table is a zoom tool.

21. The system of claim 19 , wherein the gesture shape is an ellipse and the processing tool associated with the ellipse in the processing tool table is a highlight/spotlight tool.

22. The system of claim 19 , wherein processing of the sub-region by the processing tool is controllable by a user.

23. The system of claim 19 , wherein the processing tool is a zoom tool and the magnification level of the zoom tool is further controllable by the user.

24. The system of claim 18 , wherein the processing tool is selected from the group consisting of a zoom tool, a cropping tool, a highlighting tool, and a spotlighting tool.

25. The system of claim 18 wherein said processing structure at least temporarily makes visible the at least a subset of the potential region borders in response to a pointer being swept thereacross.

26. The system of claim 25 wherein each potential region border is at least temporarily made visible when the pointer is within a threshold distance thereof.