Application of the filtering algorithms to clusters from the RHAPSODY-G suite of simulations. From top to bottom, the clusters are RG361_00188, RG474_00172, RG377_00181, RG448_00211, and RG474_00235 (see also Table 2 for the main properties of the sample). Left: projected dark matter density. Contours are linearly spaced. Units are arbitrary. Middle left: input raw tSZ surface brightness maps with dark matter map contours overlaid. Units are mJy beam⁻¹. Middle right: GGM filtered maps with θ₀ = 15′′. The white vectors represent the direction of the gradient, Ψ. Units are mJy beam⁻¹ arcmin⁻¹. Right: DoG filtered maps with θ₁ = 15′′ and θ₂ = 45′′. Units are mJy beam⁻¹. The contours provide the true S/N expected for the simulation of the observation of these sources done in Sect. 5. They are given by steps of 2σ excluding 0 (see Sect. 5 for further discussions about the S/N estimates).