摘要
用线阵CCD作为探测元件,对印张的十字线套印标记进行自动扫描。采用交替处于CCD光敏面之前的红、绿、蓝3种滤色片来识别十字套准线的色彩,并根据加不同滤色片CCD输出电平的不同来判别CMYK印版的偏移方向。实现了并行比较A/D变换电路对CCD输出电平进行A/D转换,并以代码形式在显示器上显示相应印版的套准误差及方向。
Sheet registration reticles were scanned automatically by detectors of linear array CCDs. The color of regis- tration reticles was identified by red, green and blue filters arranged in turn on photosensitive surface of CCDs. Deviation direction of CMYK plates was recognized by CCD output level under different color filters. A/D conversion of CCD output level was realized with parallel comparison A/D conversion circuit. The registration error and deviation direction of detected plates were displayed on the screen directly.
出处
《包装工程》
CAS
CSCD
北大核心
2013年第9期107-110,共4页
Packaging Engineering
关键词
自动检测
CCD
套准误差
automatic detection
CCD
registration error
