Flash collision detection, compensation, and prevention

摘要

Certain aspects relate to systems and techniques for flash collision detection, compensation, and prevention. For example, the flash of another camera or other sudden increases in ambient lighting of an image scene can introduce unwanted quality degradations into captured images, for example over-exposure of part or all of the captured image. Flash collision can be detected through a row sum calculation and comparison process in some examples. In some examples, flash collision can be compensated for by analysis of row sum data from a number of preview frames. In other examples, flash collision can be mitigated or prevented through use of a flash traffic control protocol.

主权项

1. A system for flash collision detection and compensation, the system comprising:
an image sensor configured to capture a plurality of preview frames depicting an image scene and a final image depicting the image scene, each of the plurality of preview frames including a plurality of pixels arranged in a plurality of rows: and a frame analyzer processor configured to:
for a first row of the plurality of rows in a current frame of the plurality of preview frames, calculate a first row sum value by summing a value of each of the plurality of pixels in the first row,for a second row of the plurality of rows in a previous frame of the plurality of preview frames, calculate a second row sum value by summing a value of each of the plurality of pixels in the second row, the first row and the second row depicting a substantially similar portion of the image scene,calculate a row sum difference based at least partly on subtracting one of the first row sum value and the second row sum value from the other of the first row sum value and the second row sum value, output one of a flash collision detected indication or a flash collision not detected indication based at least partly on the row sum difference,
in response to the flash collision detected indication, generate instructions to continue capture, by the image sensor, of at least one additional preview frame depicting the image scene, andin response to the flash collision not detected indication, generate instructions to capture, by the image sensor, the final image of the image scene.