Combining multiple images in bracketed photography

摘要

Embodiments provide a unified method for combining images such as high dynamic range images, flash-no-flash image pairs, and/or other images. Weight masks are defined for each of the plurality of images by calculating coefficients for each of the weight masks. Calculating the coefficients includes, at least, performing histogram alignment between a reference image and each of the other input images and by applying a mismatch bias to the coefficients as a function of the histogram alignment. After applying the weight masks to the corresponding images, the images are combined to produce a final image.

主权项

1. A system for combining images produced by bracketed photography, said system comprising:
a camera associated with a mobile computing device, the camera having a flash for activation therewith; a memory area associated with the mobile computing device, said memory area storing a flash image captured by the camera while activating the flash and a reference image captured by the camera without activating the flash; and a processor programmed to:
define weight masks for the flash image and the reference image stored in the memory area, defining the weight masks including calculating coefficients for each of the weight masks by:
performing histogram alignment between the reference image and the flash image,applying mismatch bias to the coefficients as a function of the performed histogram alignment,comparing redness in the flash image to redness in the reference image, andadjusting the coefficients based on the comparison;apply the defined weight masks to the flash image and the reference image; andproduce a final image by blending the reference image and the flash image with the corresponding weight masks.