Difference between the resolution of the original (JPEG Quality factor compression 90) and the compressed (JPEG Quality factor compression 40) digital slide, depicting the same region of a papillary thyroid cancer. (HE-stain, 100× magnification.) The pixelation is clearly visible on the right image, after compressing the digital slide.
Fónyad et al. Diagnostic Pathology 2010 5:73 doi:10.1186/1746-1596-5-73