Labels:text | diagram | screenshot | plan | rectangle OCR: (a) 0 2 3 Bit 1 0 Bit 0 Seal #1 Bit 2 2 Seal #2 Bit C 3 Bit 0 8lt 2 Bit 3 4 5 Sample 6x6 -- Pixel Image (b] 0 2 3 4 5 55 73 123 123 205 0 123 70 72 147 199 130 123 123 67 73 123 2 140 133 120 72 117 3 158 159 142 123 123 69 122 4 195 178 150 112 67 70 5 71* - Original pixel value 70- Pixel value after embedding a checksum bit Figure 4: Disguising your checksum as noise using a monochrome image. (a) Random walk sequence for two nonintersecting seals; (b) fixed modifications due to seal embedding (checksum=0011;).
