Algorithm 2: Our algorithm (DCSR).

Input: The measurement $f$ and the linear measurement matrix $A$ Initialization: ${\gamma }_0={\phi }_0=0$,$u_0=f$, $w_0=x_0=0$ while Outer stopping criteria unsatisfied do while Inner stopping criteria unsatisfied do use Equation (22) to solve $w$ sub-problem use Equation (24) to solve $u$ sub-problem use Equation (31) to solve$x$ sub-problem end while Update multipliers by using Equation (20) end while Output: The final image $u$ is restored.