Keywords: Insectivorous Plants Drew's grid.png en Copy of en File Insectivorous Plants Drew's copy jpg with a overlaid 8×8 grid Image demonstrates that when a 8×8 block with pixel co-ordinate rows 8m+1 8m+8 columns 8n+1 8n+8 contains no text at all JPEG compression produces a clean looking monochromatic block However blocks containing even a pixel of text show the usual JPEG compression artifacts This reflects the fact that JPEG can compress DC images or DC blocks in images without any visible artifacts even at a high compression ratio English wikipedia User Abecedare and en User Drew R Smith Logos |