| 摘要 |
PURPOSE:To judge video information on a number of objects to be inspected introduced continuously with ease in comparison with a reference product information, by comparing video signals between the reference product and the object being inspected in real time. CONSTITUTION:An object A to be inspected is photographed to be converted into digital from analog and the video signal is applied to a comparison circuit 15. The comparison circuit 15 is made up of a real time comparison circuit 16 which compares the signal with a numeral of a reference product AS memorized into a memory circuit 12 and an allowable range comparison circuit 17. A specified pixel of the memory circuit 12 and a specified pixel of the video of the object A are made to coincide with a synchronous command circuit 18 with the pixel of a predetermined specified position as reference, then, both pixel signals are delivered sequentially synchronizing each other to be fed into a real time comparison circuit 16, which judges the difference (voltage difference) between both the signals and the results are applied into the next allowable range comparison circuit 17 to determine whether the difference is within the allowable range or not. The propriety of the signal (voltage) of each pixel is judged with the measuring range B of the video of the object A and when deficiency is found, a proper command is issued or a display lamp comes on. |
