Picture synthesis method and device and character recognition system

The embodiment of the invention discloses a picture synthesis method and device and a character recognition system, and the method comprises the steps: obtaining original corpus information, and screening the original corpus information to obtain target corpus information for picture synthesis; segmenting the target corpus information to obtain a plurality of character sets, and selecting one target character set from the plurality of character sets; obtaining a font file, and selecting one font from the font file as the font of the target character set; obtaining a background picture, and selecting one background picture from the background pictures as the background picture of the target character set; calculating the sum of the distances between the clustering center of the background picture and the color numbers of the font colors of the target character set; taking the color of which the distance sum is greater than a set distance threshold value as the color of the target character set; and synthesizin