US 12,449,750 B2
Duplex document copying system and method thereof
Chen-Chang Li, Hsinchu (TW)
Assigned to AVISION INC., Hsinchu (TW)
Filed by AVISION INC., Hsinchu (TW)
Filed on Dec. 4, 2023, as Appl. No. 18/527,421.
Claims priority of application No. 111146614 (TW), filed on Dec. 5, 2022.
Prior Publication US 2024/0184236 A1, Jun. 6, 2024
Int. Cl. H04N 1/04 (2006.01); G03G 15/00 (2006.01); G03G 15/23 (2006.01)
CPC G03G 15/23 (2013.01) [G03G 15/60 (2013.01); H04N 1/04 (2013.01); G03G 2215/00586 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A duplex document copying system applied to a manual operation for a document, comprising:
a scanning device configured to obtain first scanning data and second scanning data from scanning the document; and
a processing device connected to the scanning device and configured to store one or more block pixel thresholds;
wherein the processing device compares pixel difference information between the first scanning data and the second scanning data with the one or more block pixel thresholds to determine a similarity between the first scanning data and the second scanning data to avoid repeated scans;
wherein the processing device executes a pixel similarity algorithm on the first scanning data and the second scanning data to obtain the pixel difference information;
wherein the processing device comprises:
an input circuit configured to receive the first scanning data and the second scanning data;
a memory configured to store the one or more block pixel thresholds and temporarily store the first scanning data and the second scanning data; and
a processor connected to the input circuit and the memory, and configured to obtain first pixel information of a first designated block and second pixel information of a second designated block according to the first designated block of the first scanning data and the second designated block of the second scanning data, and obtain the pixel difference information between the first pixel information and the second pixel information according to the first pixel information and the second pixel information.