Pattern Instrumentation (2)

Computer control with data acquisition and Instrumentation

Abstract

Computer controlled scanning and data acquisition for the pattern instrumentation system are made by an AD converter, three DA converters, and relays, which are controlled by the CPU. Scanning control and data conversion sequence are shown in Fig. 2. Data are output by an on-line high speed paper tape puncher. Fully automated instrumentation is made by the hardware and software system.
Characteristics of this system is shown by the standard color tips as Fig. 3 and Fig. 4. Plane pattern representation of the tips and an orange leaf by the skew coordinates plot with the on-line analog computer are given in Fig. 6 and Fig. 7, respectivly. Finer representation of scanning pitch will be sufficient for more detailed information of the leaf. In three different focused level, scanning line representation of a cherry is also given so as to show the possibility of three dimensional shape estimation. Besides the reflection measurement, it can operate as a photo-densitometer for the transparent specimen. Fig. 10 is obtained from this mode of operation with a positive color film of an orange leaf.
Capabilities of pattern instrumentation and its application to the agricultural machinery research are expected by this system. Further studies on the pattern recognition based on this instrumentation will be reported in the successive papers.