Ground-based and space-based VLBI images of 3C 84 at 22 GHz. Left panel: uniformly weighted global-VLBI image. The restoring beam size is 0.45 × 0.18 mas at PA = −2° and the rms noise is 1.5 mJy beam⁻¹. Middle panel: super-uniformly weighted space-VLBI CLEAN image. The restoring beam size is 0.10  ×  0.05 mas at PA = 0° and the rms noise is 1.4 mJy beam⁻¹. This image was originally published in Giovannini et al. (2018). The colour scale is restricted to positive intensity values in order to help comparison with the regularised maximum likelihood image on the right. An image with the full intensity range in the colour scale can be found in Appendix D. Right panel: regularised maximum likelihood space-VLBI image made with EHTIM. The used hyperparameters are MEM = 10, TV1 = 1, TV2 = 0 and L1 = 1. The colour scale in all images has a lightness proportional to the square-root of the pixel intensity.