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| Content Provider | ACM Digital Library |
|---|---|
| Author | Alonso, J. R. F. |
| Abstract | A suite of APL programs is described for characterization of bounded images for on-line process control or for artificial intelligence recognition functions. Beginning with an acquired threshold and edge enhanced image, the programs:detect the edges and close all bounded areas in the imageproduce arrays with the (x,y) locations of the boundaries of each object (bounded area) in the field, allowing for touching, segmented, perforated, embedded objects (all reported as separate arrays of sequenced coordinate pairs)compress the image using a quad tree procedure for archival or legal purposesfit parametric polynomial, conventional Fourier or inner product-outer product - matrix inversion Fourier equations to the object boundaries, to any desired number of coefficient terms or number of boundary pixel points.displays results and analyses of degree of fit in a windowed environment performs accept-reject-identify checks by comparison of the calculated Fourier coefficients from “perfect” objects or from a CAD system database.The system is written in 500 lines of IBM APL/PC Version 2 for a PC/AT with 80287 co-processor, and it is presently being interfaced to Data Translation image grabber hardware and software, with 512x512 acquisition resolution.Parameterization fitting accuracy is increased by considering not pixel center coordinates but intersection of boundary regression lines with pixel boundaries.The user interface makes the suite of programs manageable by a competent technical user without programming or APL knowledge. |
| Starting Page | 5 |
| Ending Page | 9 |
| Page Count | 5 |
| File Format | |
| ISBN | 0897912535 |
| DOI | 10.1145/55626.55628 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 1987-12-01 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Content Type | Text |
| Resource Type | Article |
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