发明名称 |
METHOD AND APPARATUS FOR INSPECTING PRINTED CHARACTER |
摘要 |
PURPOSE:To certainly judge the quality of a printed character without being affected by the positional shift with a standard image by taking the image of the characters of printed matter by a camera and binarizing the character signal due to imaging and dividing a binarization signal by a clock to form rectangular waves and detecting the space between characters to calculate the number of characters and comparing the number of characters with the number of standard characters. CONSTITUTION:In the printing inspection of printed matter W, the image of printed characters is taken by a CCD camera 20 to he compared with the color of a color level memory circuit 3 in the first comparing circuit 21 and further compared with the ground color of the color level memory circuit 3 in the second comparing circuit 22 to judge a good product. A signal is brinarized by a waveform shaping circuit 23 and divided by a clock T to be inputted to a stock circuit 24 as rectangular waves and the longitudinal and lateral dimensions of an outer mask Q are compared with the values of an outer mask reference circuit 25 to judge quality. The rectangular waves are inputted to a longitudinal OR circuit 25 and the rectangular wave signals of respective VD lines are successively subjected to OR processing using upper and lower signals as a set and character sections are judged by a character section judging circuit 25 and the number of sections is integrated by an integration circuit 27 and the number of characters are calculated by a calculation circuit 28 to be compared with the value of a number-of-character of a number-of-character memory circuit 8 by a number-of-character comparing circuit 29. |
申请公布号 |
JPH0334880(A) |
申请公布日期 |
1991.02.14 |
申请号 |
JP19890169219 |
申请日期 |
1989.06.30 |
申请人 |
INTAADETSUKU:KK |
发明人 |
TSUJII TAICHI;NAKANO MINORU |
分类号 |
B41J29/46;G06T1/00;H04N1/00 |
主分类号 |
B41J29/46 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|