Video support in a multi-aperture mobile camera with a scanning zoom camera
Systems and methods for obtaining a seamless, smooth transition between a Wide field of view (FOV) camera and a scanning Tele camera by correcting prism aberrations, matching Tele and Wide FOVs, localizing the associated Tele FOV, and zooming a Wide frame towards the localized Tele FOV.
1. A zoom camera, comprising:
a Wide camera with a Wide field of view (FOVW) and operative to output Wide images (WIs);
a scanning Tele camera (STC) with a native scanning Tele FOV (n-FOVT) narrower than FOVW and operative to output scanning Tele images (STIs); and
a camera controller operatively coupled to the Wide camera and to the STC and configured to stream a video image stream that displays a continuous zoom-in action into, or a continuous zoom-out action out off a non-center area within FOVW,
wherein the video images are provided with a smooth transition when switching from displaying WIs to displaying STIs or vice versa, and wherein the switching from displaying STIs to displaying WIs is performed at a down-transfer ZF value (ZFDOWN) that depends on a point-of-view (POV) of the n-FOVT within the FOVW.
2. The zoom camera of claim 1 , wherein ZFDOWN(center POV) is a down-transfer ZF value of a center POV within FOVW and ZFDOWN(margin POV) is a down-transfer ZF value of a POV in a margin region within FOVW, and wherein ZFDOWN(center POV)<ZFDOWN(margin POV).
3. The zoom camera of claim 1 , wherein the switching from displaying WIs to displaying STIs is performed at an up-transfer ZF value (ZFUP), wherein the ZFUP does not depend on the POV of a native FOVT (n-FOVT) within FOVW, wherein [ZFDOWN(x,y)]MAX is a maximal value of ZFDOWN(x,y) for all possible POVs within a scanning FOV (s-FOVT) of the STC, and wherein ZFUP ≥[ZFDOWN(x,y)]MAX.
4. A zoom camera, comprising:
a Wide camera with a Wide field of view (FOVW) and operative to output Wide images (WIs);
a scanning Tele camera (STC) with a native scanning Tele FOV (n-FOVT) narrower than FOVW and operative to output scanning Tele images (STIs); and
a camera controller operatively coupled to the Wide camera and to the STC and configured to stream a video image stream that displays a continuous zoom-in action into, or a continuous zoom-out action out off a non-center area within FOVW,
wherein the video images are provided with a smooth transition when switching from displaying WIs to displaying STIs or vice versa, wherein the switching from displaying WIs to displaying STIs is performed at an up-transfer ZF value (ZFUP), wherein the switching from displaying STIs to displaying WIs is performed at a down-transfer ZF value (ZFDOWN), and wherein the values of ZFUP and/or ZFDOWN in a video photography mode are 5%-30% larger than the values of ZFUP and/or ZFDOWN in a still photography mode.
5. A zoom camera, comprising:
a Wide camera with a Wide field of view (FOVW) and operative to output Wide images (WIs);
a scanning Tele camera (STC) with a native scanning Tele FOV (n-FOVT) narrower than FOVW and operative to output scanning Tele images (STIs); and
a camera controller operatively coupled to the Wide camera and to the STC and configured to stream a video image stream that displays a continuous zoom-in action into, or a continuous zoom-out action out off a non-center area within FOVW,
wherein the video images are provided with a smooth transition when switching from displaying WIs to displaying STIs or vice versa, wherein the switching from displaying WIs to displaying STIs is performed at an up-transfer ZF value (ZFUP), wherein the switching from displaying STIs to displaying WIs is performed at a down-transfer ZF value (ZFDOWN), and wherein the values of ZFUP and/or ZFDOWN in a digital image-stabilized video mode are 5%-30% larger than the values of ZFUP and/or ZFDOWN in a non-image-stabilized video mode.