DEPTH MAP GENERATION USING BOKEH DETECTION

摘要

In one aspect, one or more computing devices receive a set of image frames. Each image frame includes pixels. The computing devices align image frames in order to identify flows of the pixels in the set of image frames. Regions of bokeh effect are identified in each image frame by measuring the sizes of areas of expansion across image frames using a set of assumptions and the identified flows. The computing devices adjust the alignment of the set of image frames based at least in part on the identified regions of bokeh effect. For each image frame, the computing devices generates an index map of focus values for each of the pixels that image frame using the improved alignment. A depth map is generated by the computing devices based at least in part on the index maps.

主权项

1. A method for generating depth maps, the method comprising:
receiving, by one or more computing devices, a set of image frames, each image frame of the set of image frames including pixels; aligning, by the one or more computing devices, the set of image frames to provide flows of the pixels in the set of image frames; identifying, by the one or more computing devices, any region of bokeh effect in each image frame of the set of image frames by measuring sizes of areas of expansion across image frames of the set of image frames using an assumption that contour expansion due to a bokeh effect has consistent movements through frames of the set of frames and the flows; adjusting, by the one or more computing devices, the alignment of the set of image frames based at least in part on the identified regions of bokeh effect; generating, by the one or more computing devices, for each particular image frame of the set of image frames an index map of focus values for the pixels of that particular image frame using the improved alignment; and generating, by the one or more computing devices, a depth map based at least in part on the index maps.