VCD reports the spatial and temporal complexity features of the test sequences considered. Two state-of-the-art tools are considered to compute this complexity:

### SITI

SI indicates the maximum amount of spatial detail in a video. SI computation is summarized as shown below:

- Filter the luma samples of each frame with the Sobel filter.
- Compute the standard deviation over the Sobel filtered frame pixels.
- Take the maximum of the standard deviations.

Correspondingly, TI stands for the maximum amount of temporal variation between successive frames.

Average SI and TI scores for each video can be found here.

Frame-wise SI and TI values for each video can be found here.

### VCA

Video Complexity Analyzer (VCA) determines the spatial and temporal complexity using DCT-energy-based features. A DCT-based energy function is introduced to determine the block-wise texture of each frame.

Average E and h scores for each video can be found here.

Frame-wise E and h values for each video can be found here.