| 摘要 |
PURPOSE:To make it possible to measure the amount of bank which is stored between rubber sheet rollers accurately, by removing unnecessary parts from a black and white binary signal picture based on the difference in TV pictures showing the presence or absence of the bank. CONSTITUTION:When rubber is not supplied and bank B is not present between rolls 1 and 2 for forming a roller sheet 3, a picture, wherein the roll junction part is white, is picked up by a TV camera 5 and stored in a memory 12. Then a picture, wherein the bank B is present, is stored in a memory 12. The difference in contents of the memories 11 and 12 is obtained by a subtractor 9 and compared with a preset reference value in a comparator 10. Every picture element is converted into a binary signal corresponding to black and white. The outputted signal is stored in a memory 13. The content of the memory 13 is further scanned by a frame which has a width in the horizontal direction of the picture. The black part, which is smaller than the width is converted into the white part, and the unnecessary part such as rubber feeding lines, their shades, and the protruded parts of the bank are removed. The amount of bank is measured highly accurately based on the occupying ratio of the removed black parts in each zone of the unnecessary parts. |
