Method for enlarging a binary image

Details Method for enlarging a binary image Method for enlarging a binary image

G - Physics

09

G

375/4

G09G 3/00 (2006.01) G06T 3/40 (2006.01) H04N 1/393 (2006.01)

Patent

CA 1238727

ABSTRACT OF THE DISCLOSURE A method for enlarging a binary image by an arbitrary factor includes the steps of storing the image in bit sequence; rotating the image in a first direction by ninety degrees; inserting one or more rows of expansion bits along the origional horizontal axis of the image to convert i rows of bits to j rows of bits where i<j<=2i; assigning a value to each expansion bit generated by the above step; repeating the steps of inserting and assigning a predetermined number of times to achieve an enlargement by a factor F1 along said original horizontal axis; rotating the image in a second direction opposite said first direction by ninety degrees; inserting one or more rows of expansion bits along the vertical axis of the image to convert i rows of bits to j rows of bits where i<j<=2i; assigning a value to each expansion bit generated by the above step; repeating the steps of inserting and assigning a predetermined number of times to achieve an enlargement by a factor F2 along said vertical axis; storing the enlarged image generated by the above steps. YO9-84-087

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