Monocular Depth Estimation
For monocular, see Monocular Depth Estimation.
Stereo Depth Estimation
Usually, with stereo depth estimation, we first estimate the Disparity between a stereo image pair. Then, computing the depth from the disparity output of these models are disparity values.
Disparity to depth?
For stereo, we can obtain the depth from the Disparity of a stereo camera image pair, and with the baseline of the stereo image pair, we can easily calculate depth for a given pixel.
Ways to achieve Depth estimation