efficient implementation of joint bilateral filter

摘要

an integrated circuit and computer-implemented method are provided to estimate an image depth map using a combined bilateral filter with reduced computational complexity. for this purpose, image data from an image is also accessed as depth data from a template depth map. a joint bilateral filter is then applied to the template depth map using the image data as a range term in the joint bilateral filter, thus obtaining an adapted image depth map as an output. the application of the joint bilateral filter comprises initializing a summed volume of weighted depths and a summed weight volume as respective empty data structures in a memory, performing a splatting operation to supply said volumes, performing a slicing operation to obtain an adapted image depth volume, and performing an interpolation operation to obtain an adapted image depth value from the adapted image depth map for each pixel in the image. compared to the known methods of estimating the depth map from an image using a combined bilateral filter, reduced computational complexity is obtained.