US Patent No. 9,449,374

SYSTEM AND METHOD FOR MULTI-FRAME TEMPORAL DE-NOISING USING IMAGE ALIGNMENT


Patent No. 9,449,374
Issue Date September 20, 2016
Title System And Method For Multi-frame Temporal De-noising Using Image Alignment
Inventorship James Wilson Nash, San Diego, CA (US)
Kalin Mitkov Atanassov, San Diego, CA (US)
Assignee QUALCOMM Incoporated, San Diego, CA (US)

Claim of US Patent No. 9,449,374

1. An electronic device for capturing an image, the device comprising:
a memory component configured to store frames of image data, each frame having a plurality of pixels;
an electronic image sensor coupled to the memory component, the image sensor configured to capture frames of image data comprising
a plurality of pixels;

a processor in data communication with the memory component, the processor configured to:
capture a plurality of frames of image data using the image sensor and store the plurality of frames in the memory component;
align the plurality of frames with each other by adding a first frame of the stored plurality of frames to a stack and calculating
a fit between a first center frame at a center position of the stack and a frame adjacent to the first center frame;

determine a focus quality of each frame of the plurality of frames during the aligning the plurality of frames;
determine a subset of frames of the plurality of frames, the subset of frames determined based upon the determined focus quality
of each frame of the plurality of frames; and

combine the subset of frames into a single image using a motion filter to reduce blurriness and ghosting.