Schematic diagram of MDGI with pseudo thermal light. (a) Schematic diagram of ghost imaging with pseudo thermal light. Inside the red dotted line on the left side of the schematics is pseudo-thermal light source. BS: beam splitter; D1: bucket detector without spatial resolution; D2: reference detector with spatial resolution; L: lens; Z₁: distance between light source and object; Z₂: distance between light source and reference detector; PC: personal computer. (b) Schematic diagram of mask-based denoising scheme. Inside the blue dotted line on the schematic is mask Φ mask − r N and new measurement matrix A_new construction process.