skvideo.measure.psnr¶

skvideo.measure.psnr(referenceVideoData, distortedVideoData, bitdepth=8)[source]¶

Computes Peak Signal to Noise Ratio (PSNR).

Both video inputs are compared frame-by-frame to obtain T PSNR measurements.

Parameters:

referenceVideoDatandarray

Reference video, ndarray of dimension (T, M, N, C), (T, M, N), (M, N, C), or (M, N), where T is the number of frames, M is the height, N is width, and C is number of channels.

distortedVideoDatandarray

Distorted video, ndarray of dimension (T, M, N, C), (T, M, N), (M, N, C), or (M, N), where T is the number of frames, M is the height, N is width, and C is number of channels.

bitdepthint

The number of bits each pixel effectively has

Returns:

psnr_arrayndarray

The psnr results, ndarray of dimension (T,), where T is the number of frames