Portrait image synthesis from multiple images captured on a handheld device
A hand-held digital image capture device (digital camera) has a user-selectable mode in which upon engaging the mode the device detects a face in the field of view of the device and generates a face delimiter on a camera display screen, the delimiter surrounding the initial position of the image of a the face on the screen. The device is arranged to indicate thereafter to the user if the device departs from movement along a predetermined concave path P with the optical axis of the device pointing towards the face, such indication being made by movement of the image of the face relative to the delimiter. The camera captures and stores a plurality of images at successive positions along the concave path.
1. A hand-held digital image capture device, comprising:
a lens and image sensor for capturing digital images;
a display screen;
a processor; and
a user-selectable mode switch configured to trigger the device to detect a face in the field of view of the device and to generate a face delimiter on the display screen surrounding an initial position of an image of the face on the screen, the device thereafter indicating to the user if the device departs from movement along a predetermined concave path with the optical axis of the device pointing towards the face, such indication being made by movement of the image of the face relative to the delimiter,
wherein the device is further configured to capture and store a plurality of images at successive positions along the concave path.
2. A device as claimed in claim 1 , wherein the device is arranged to alert the user when the device deviates from the path by greater than a predetermined amount.
3. A device as claimed in claim 1 , wherein the device is arranged to alert the user when the size of a face image deviates by more than a predetermined amount from an initial size.
4. A device as claimed in claim 1 , wherein the device is arranged to alert the user when a face image moves out of the delimiter by more than a predetermined amount.
5. A device as claimed in claim 1 , wherein when a single face is detected by the device the face delimiter is fixed in size and position on the display screen during movement along the concave path.
6. A device as claimed in claim 1 , wherein the corresponding face delimiter dynamically changes in size on the display screen as the device moves along the concave path.
7. A device as claimed in claim 1 , wherein the device is arranged to alert the user if the speed of movement along the path falls outside predetermined limits.
8. A device as claimed in claim 1 , wherein the stored images comprise at least one stereo pair.
9. One or more non-transitory processor-readable storage media having code embodied therein for programming a processor to operate a camera-enabled device in a user-selectable mode to detect a face in the field of view of the device and to generate a face delimiter on a display screen surrounding an initial position of an image of the face on the screen, the device thereafter indicating to the user if the device departs from movement along a predetermined concave path with the optical axis of the device pointing towards the face, such indication being made by movement of the image of the face relative to the delimiter, and for programming the processor operate the camera-enabled device to capture and store a plurality of images at successive positions along the concave path.
10. The one or more non-transitory processor-readable storage media as claimed in claim 9 , wherein the device is arranged to alert the user when the device deviates from the path by greater than a predetermined amount.
11. The one or more non-transitory processor-readable storage media as claimed in claim 9 , wherein the device is arranged to alert the user when the size of a face image deviates by more than a predetermined amount from an initial size.
12. The one or more non-transitory processor-readable storage media as claimed in claim 9 , wherein the device is arranged to alert the user when a face image moves out of the delimiter by more than a predetermined amount.
13. The one or more non-transitory processor-readable storage media as claimed in claim 9 , wherein when a single face is detected by the device the face delimiter is fixed in size and position on the display screen during movement along the concave path.
14. The one or more non-transitory processor-readable storage media as claimed in claim 9 , wherein the corresponding face delimiter dynamically changes in size on the display screen as the device moves along the concave path.
15. The one or more non-transitory processor-readable storage media as claimed in claim 9 , wherein the device is arranged to alert the user if the speed of movement along the path falls outside predetermined limits.
16. The one or more non-transitory processor-readable storage media as claimed in claim 9 , wherein the stored images comprise at least one stereo pair.