3a: AEC Multi-window metering mode implementation
Mapping user specified Multi metering weighting windows to
RGB statistic grid, AEC algorithum uses this information
to calculate a weighted histogram to get accurate AEC calculation.
* User can set multiple arbitrary metering windows (both size and
coordinator) inside of image frame dynamically.
* The maximum metering window count is defined in source code,
currently defined as 6, it can be more.
* Overlap metering window weighting is not supported yet, the last
window’s weighting factor will overwrite the former one in the
overlapped region.
* User should assign 0 ~ 15 weighting factor to each metering
window, the pixel weighted by 0 will not take into account in
AEC calculation.
Signed-off-by: Wind Yuan <feng.yuan@intel.com>
11 files changed