Patent ID: 9349062
Filing Date: 2016-05-24
CPC Classification: G06K,G06T

Claim Text:
1. A character recognition method implemented on a processor and a memory, the memory including instructions to configure the processor to perform the method comprising: acquiring an image and locating a character region in the image by the processor, wherein the character region comprises a character and a local background; calculating, by the processor, a first ratio comprising a ratio of number of pixels corresponding to a main color of the local background and a total number of pixels of the local background; determining, by the processor, that the local background is a complex background in response to the first ratio being less than a first threshold; calculating, by the processor, a second ratio comprising a ratio of number of pixels corresponding to a main color of a whole background of the image and a total number of pixels of the whole background in response to the first ratio not being less than the first threshold; determining, by the processor, that the local background is a complex background in response to the second ratio being less than another threshold; determining, by the processor, a color of the character in response to the local background being a complex background; constructing, by the processor, a mask for the character by combining the color of the character and a color of the character region; extracting, by the processor, the character from the character region by using the mask; and recognizing the character and outputting the recognition result by the processor.