Ring of the M87 image reconstructions at 86 GHz from Fig. 1. The color shows intensity in Jy mas⁻² according to the linear color bar located at the right of the figure. Each image presents results obtained by a different algorithm, whose names are indicated in the lower right corners. The left image is the resolve posterior mean image using the Bayesian self-calibration and imaging method. The left-center image is the DoG-HiT reconstruction using closures only imaging. The right-center image represents the CLEAN reconstruction with the over-resolved 37 μas circular beam in Lu et al. (2023). The right image shows the SMILI reconstruction in Lu et al. (2023). All images were processed by a Gaussian interpolation.