Image binarization method and electronic device

An electronic device, comprising:

• an image capturing device;
• a main memory;
• and
• a binarization circuit, electrically connected to the image capturing device and the main memory,
• wherein the image capturing device is configured to capture an image, wherein the image comprises a plurality of pixels in an M×N matrix, wherein M and N are positive integers, wherein a size of the main memory is Y*M*N bits, wherein Y is a preset positive integer corresponding to the main memory,
• wherein the binarization circuit is configured to select a target pixel row arranged at the front from one or more unselected first pixel rows among M pixel rows of the image according to a row order,
• wherein the binarization circuit is further configured to perform a binarization operation on the target pixel row to obtain a binarized pixel row,
• wherein the binarization circuit is further configured to store the binarized pixel row to the main memory;
• wherein the binarization circuit is further configured to determine whether the M pixel rows are all selected,
• wherein in response to the M pixel rows not all being selected, the binarization circuit is further configured to perform the step of selecting the target pixel row arranged at the front from the one or more unselected first pixel rows among the M pixel rows of the image according to the row order by the binarization circuit again,
• wherein in response to the M pixel rows all being selected, the binarization circuit is further configured to complete the binarization operation on the image.