Kabushiki Kaisha Toshiba

Tikara Sano

Yoshikatu Nakamura

A line image detection apparatus having an image input function for inputting an image on a document. The image includes a rectangular character string and a linear line drawn along the character string. The line detection apparatus has a function for detecting a character string image from the image, a function for forming a projection image on the basis of the distance from a lower end of the character string image to each first black pixel found in the character string image in the vertical direction, and a function for comparing the distance from the lower end of the character string image to each first black pixel, with a predetermined threshold value, thereby to define a plurality of 'slice 0' areas included in the projection image. The distance, in each of the 'slice 0' areas, from the lower end of the character string image to each first black pixel is lower than the predetermined threshold value. The apparatus also includes a function for determining an interval distribution of the interval between each adjacent pair of the 'slice 0' areas determined by an area determination means, and a function for detecting the linear line on the basis of the interval distribution.

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Hiratsuka, Japan

Tikara Sano