An Efficient Compressive Sensed Video Codec with Inter-Frame Decoding and Low-Complexity Intra-Frame Encoding

. 2023 Jan 26;23(3):1368. doi: 10.3390/s23031368

Algorithm 2: Basic soft thresholding operator (Version 1)

Input:

{\tilde{X}}_{1}, \dots, {\tilde{X}}_{F}, σ

1:
$X_{1} \leftarrow 0, \dots, X_{F} \leftarrow 0$ , $W_{1} \leftarrow 0, \dots, W_{F} \leftarrow 0$
2:
for $f = 1, \dots, F$ do
3:
for $i = 1, \dots, W - N$ do
4:
for $j = 1, \dots, H - N$ do
5:
$R \leftarrow g e t b l o c k ({\tilde{X}}_{f}, i, j, N)$
6:
${B_{1}, v_{1}, \dots, B_{F}, v_{F}} \leftarrow$ HME $(i, j, R, {\tilde{X}}_{1}, \dots, {\tilde{X}}_{F})$
7:
${[{\hat{B}}_{1}; \dots; {\hat{B}}_{F}], γ} \leftarrow w i e n e r ([B_{1}; \dots; B_{F}], σ)$
8:
for $n = 1, \dots, F$ do
9:
${S, E} \leftarrow i n s e r t ({\hat{B}}_{n}, v_{n})$
10:
$X_{n} \leftarrow X_{n} + γ S$
11:
$W_{n} \leftarrow W_{n} + γ E$
12:
end for
13:
end for
14:
end for
15:
end for
16:
for $f = 1, \dots, F$ do
17:
${\hat{X}}_{f} \leftarrow X_{f} / W_{f}$
18:
end for