Cost volume

Cost volumes, or plane-sweep volumes, are a technique used to regress depth from stereo image pairs.

Method

The basic idea is to do

References

• DPSNet: End-to-end Deep Plane Sweep Stereo
  • Here they build a cost-volume of image features (extracted via an encoder).
  • Each image is represented as a latent tensor of shape (W, H, C).
  • The cost volume is build by concatenating tensors. It is a tensor of shape (W, H, C, L).
• 360SD-Net: 360° Stereo Depth Estimation with Learnable Cost Volume
  • Here they learn the step size used to build the cost volume.