US 12,205,237 B2
Automatic dolly zoom image processing device
Chih-Wei Chen, Hsinchu (TW); Pei-Kuei Tsung, Hsinchu (TW); Yao-Sheng Wang, Hsinchu (TW); Chun Chen Lin, Hsinchu (TW); Chia-Ching Lin, Hsinchu (TW); and Hsiao-Chien Chiu, Hsinchu (TW)
Assigned to MediaTek Inc., Hsinchu (TW)
Filed by MediaTek Inc., Hsinchu (TW)
Filed on Apr. 18, 2022, as Appl. No. 17/722,711.
Prior Publication US 2023/0334619 A1, Oct. 19, 2023
Int. Cl. G06T 7/194 (2017.01); G06T 3/40 (2006.01); G06T 7/571 (2017.01); H04N 23/69 (2023.01)
CPC G06T 3/40 (2013.01) [G06T 7/194 (2017.01); G06T 7/571 (2017.01); H04N 23/69 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a device for producing a dolly zoom effect, comprising:
capturing, with a camera on the device, an initial image including at least a foreground object and a background;
identifying a size of the foreground object in the initial image; and
calculating and automatically adjusting a focal length of the camera to maintain the size of the foreground object in subsequent images,
wherein for each of the subsequent images, the method further comprises:
calculating a change of foreground object size in a sensed image that is sensed by an image sensor of the camera;
automatically determining an adjusted focal length according to the change; and
capturing the sensed image as the subsequent image with the adjusted focal length.