Based on the analysis of the error rates of the Cera Vision systems Installed and with the acknowledged help of our clients, today some well-founded answers can be given: · Many tile designs can be inspected and sorted automatically with an average error rate that Is substantially lower then the error rate of the human Inspector · Commercially available systems differ substantially In their abilities to detect aesthetic defects and to reliably grade by colour shades and colour textures. Systems such as Cera Vision which simulate the human perception have a definite advantage · A small number of very rustic tile designs remain that resist a robust automatic inspection. It is therefore important to check this percentage as well as the possibility of keeping one manual inspection station for such difficult tiles. · Automatic tile inspection systems from the leading suppliers are by now average prototypes, but rely on profound practical expertise operating such a system is far less complicated to a trained operator then commonly stated. · Apart from the system for the final quality check there are now systems on the market for monitoring defects in the production line at critical processing steps such as screen printing (see the low-cost CeraScreener system). · Correct manual or an automatic inspections both require “statistical thinking". Systems cannot be compared by intuition, personal feeling or analysing just a few defect samples.
展开▼
