full-reference image metric
(images are same) 0..ā (bad quality)
smaller is better quality
CPU multithreaded
pixel-wise
Y
metric value
standard set
-metr vqm
This metric uses discrete cosine transform (DCT) to predict human rank. It is different from widely spreaded VQM metric by ITU, that currently not implemented in VQMT. Following calculations are processed to get value of metric:
where DC is the DCT coefficient with indexes (0, 0).
where CSF is Contrast Sensitivity Function. Inverse MPEG-4 default quantization matrix is used as CSF in original article.
Please, refer the original paper for the details.
Implementation | System & settings | Colors | Resolution | FPS | Sec. per frame |
---|---|---|---|---|---|
VQMT 14.0 default | multithreaded | Y | HD 720p | 112.46 | 0.01 |
VQMT 14.0 default | multithreaded | Y | FullHD 1080p | 52.07 | 0.02 |
VQMT 14.0 default | multithreaded | Y | 4K 2160p | 14.73 | 0.076 |
VQMT 14.0 default | singlethreaded | Y | HD 720p | 25.64 | 0.041 |
VQMT 14.0 default | singlethreaded | Y | FullHD 1080p | 12.57 | 0.084 |
VQMT 14.0 default | singlethreaded | Y | 4K 2160p | 3.24 | 0.329 |
Implementation | System & settings | Colors | Resolution | FPS | Sec. per frame |
---|---|---|---|---|---|
VQMT 13.1 default | multithreaded | Y | HD 720p | 112.93 | 0.01 |
VQMT 13.1 default | multithreaded | Y | FullHD 1080p | 52.13 | 0.02 |
VQMT 13.1 default | multithreaded | Y | 4K 2160p | 14.53 | 0.076 |
VQMT 13.1 default | singlethreaded | Y | HD 720p | 25.62 | 0.04 |
VQMT 13.1 default | singlethreaded | Y | FullHD 1080p | 12.57 | 0.082 |
VQMT 13.1 default | singlethreaded | Y | 4K 2160p | 3.23 | 0.326 |
Implementation | System & settings | Colors | Resolution | FPS | Sec. per frame |
---|---|---|---|---|---|
VQMT 14.0 default | multithreaded | Y | HD 720p | 818.62 | 0.002 |
VQMT 14.0 default | multithreaded | Y | FullHD 1080p | 380.52 | 0.005 |
VQMT 14.0 default | multithreaded | Y | 4K 2160p | 49.1 | 0.035 |
VQMT 14.0 default | singlethreaded | Y | HD 720p | 22.57 | 0.045 |
VQMT 14.0 default | singlethreaded | Y | FullHD 1080p | 11.95 | 0.085 |
VQMT 14.0 default | singlethreaded | Y | 4K 2160p | 3.51 | 0.291 |
In VQMT 12 we removed input aligning, also metric is optimized.