Dual aperture zoom camera with video support and switching/non-switching dynamic control
A dual-aperture zoom digital camera operable in both still and video modes. The camera includes Wide and Tele imaging sections with respective lens/sensor combinations and image signal processors and a camera controller operatively coupled to the Wide and Tele imaging sections. The Wide and Tele imaging sections provide respective image data. The controller is configured to output, in a zoom-in operation between a lower zoom factor (ZF) value and a higher ZF value, a zoom video output image that includes only Wide image data or only Tele image data, depending on whether a no-switching criterion is fulfilled or not.
1. A zoom digital camera, comprising:
a Wide imaging section that includes a fixed focal length Wide lens with a Wide field of view (FOV) and a Wide sensor, the Wide imaging section operative to provide Wide image data of an object;
a Tele imaging section that includes a fixed focal length Tele lens with a Tele FOV that is narrower than the Wide FOV and a Tele sensor, the Tele imaging section operative to provide Tele image data of the object; and
a camera controller operatively coupled to the Wide and Tele imaging sections, wherein the camera controller is configured to receive Wide image data and Tele image data and to use the Wide image data and Tele image data to calculate a parallax between the Wide imaging section and the Tele imaging section that causes a position shift between the Wide image data and Tele image data to be dependent on a distance of the object from the zoom digital camera, wherein the distance is calculated based on a feature disparity determined during a global registration, and
wherein the camera controller is further configured to use the parallax calculation to provide focus for the Wide imaging section and/or for the Tele imaging section.
2. The zoom digital camera of claim 1 , wherein the camera controller includes a user control module for receiving user inputs and a sensor control module for configuring each sensor to acquire the Wide and Tele image data based on the user inputs.
3. The zoom digital camera of claim 1 , wherein the user inputs include a zoom factor, a camera mode and a region of interest.
4. The zoom digital camera of claim 1 , wherein the Tele lens includes a ratio of total track length (TTL)/effective focal length (EFL) smaller than 1.
5. The zoom digital camera of claim 1 , wherein the camera controller is further configured to combine in still mode, at a predefined range of ZF values, at least some of the Wide and Tele image data to provide a fused output image of the object or scene from a particular point of view.
6. The zoom digital camera of claim 1 , wherein the camera controller operatively coupled to the Wide and Tele imaging sections and configured to evaluate if a no-switching criterion is fulfilled or not fulfilled.
7. The zoom digital camera of claim 6 , wherein if the no-switching criterion is fulfilled in a zoom-in operation between a lower zoom factor (ZF) value and a higher ZF value at a zoom factor (ZF) higher than an up-transfer ZF, the camera controller is further configured to output a zoom video output image that includes only Wide image data.
8. The zoom digital camera of claim 1 , wherein if the no-switching criterion is not fulfilled, the camera controller is further configured to output a zoom video output image that includes only transformed, digitally zoomed Tele image data.
9. The zoom digital camera of claim 1 , wherein the zoom digital camera is operated in a preview mode.
10. The zoom digital camera of claim 1 , wherein the zoom digital camera is operated in a still mode.
11. A method, comprising:
providing a zoom digital camera that includes a Wide imaging section that includes a fixed focal length Wide lens with a Wide field of view (FOV) and a Wide sensor, the Wide imaging section operative to provide Wide image data of an object, a Tele imaging section that includes a fixed focal length Tele lens with a Tele FOV that is narrower than the Wide FOV and a Tele sensor, the Tele imaging section operative to provide Tele image data of the object, and a camera controller operatively coupled to the Wide and Tele imaging sections;
configuring the camera controller to receive Wide image data and Tele image data and to use the Wide image data and Tele image data to calculate a parallax between the Wide imaging section and the Tele imaging section that causes a position shift between the Wide image data and Tele image data to be dependent on a distance of the object from the zoom digital camera, wherein the distance is calculated based on a feature disparity determined during a global registration; and
configuring the camera controller to use the parallax calculation to provide focus for the Wide imaging section and/or for the Tele imaging section.
12. The method of claim 11 , wherein the camera controller includes a user control module for receiving user inputs and a sensor control module for configuring each sensor to acquire the Wide and Tele image data based on the user inputs.
13. The method of claim 11 , wherein the user inputs include a zoom factor, a camera mode and a region of interest.
14. The method of claim 11 , wherein the Tele lens includes a ratio of total track length (TTL)/effective focal length (EFL) smaller than 1.
15. The method of claim 11 , further comprising configuring the camera controller to combine in still mode, at a predefined range of ZF values, at least some of the Wide and Tele image data to provide a fused output image of the object or scene from a particular point of view.
16. The method of claim 11 , further comprising configuring the camera controller to evaluate if a no-switching criterion is fulfilled or not fulfilled.
17. The method of claim 16 , further comprising, if the no-switching criterion is fulfilled in a zoom-in operation between a lower zoom factor (ZF) value and a higher ZF value at a zoom factor (ZF) higher than an up-transfer ZF, configuring the camera controller to output a zoom video output image that includes only Wide image data.
18. The method of claim 16 , further comprising, if the no-switching criterion is not fulfilled, configuring the camera controller to output a zoom video output image that includes only transformed, digitally zoomed Tele image data.
19. The method of claim 11 , further comprising operating the zoom digital camera in a preview mode.
20. The method of claim 11 , further comprising operating the zoom digital camera in a still mode.