bdb@becker.UUCP (Bruce D. Becker) (01/27/91)
In article <1990Dec28.180111.27115@pegasus.com>, johnw@pegasus.com (John Williams) writes: | Seafloor Surveys International, Inc. is looking for a computer system | which will allow us to interactively manipulate our sonar imagery. | | Our final images of the ocean floor are of the order of | 16K by 16K pixels. These images are constructed by | interactively placing a dozen or more "sub-images" | into the final image grid. The sub-images are about 1M | pixels each. The sub-images have irregular shapes. | In some places, there are gaps between the sub-images. | In some places, the sub-images overlap. In these overlap areas, both | sub-images must be preserved so that the operator can alternately | view each (as with overlapped windows). | | The operator will use one or more high resolution color monitors | as windows into the final grid. The operator should be able to | roam around the image and zoom in and out at will. | | Within the final grid, sub-images are coarsely positioned using | available navigation data. The fine positioning is performed by | a human operator identifying "control points" which must be aligned | in two overlapping sub-images. One sub-image is "warped" to align | its control points with the other. The warping process must also | calculate corrections to the original navigation so that the | sub-image may be correctly positioned in the future. | | The complete processing of a final grid must proceed quickly enough | that the operator can complete several in a single working day. | As part of the evaluation of proposed systems, I will want to run | a benchmark test similar to the processing described above. | | For the sake of brevity, only small part of a larger processing | scheme has been described. I have described those functions I feel | will be the most difficult to implememt in a cost-effective way. | | A high resolution output device is required which can be | used to make copies of the final image. The copies must | have at least 8 dots per millimeter (200 dots per inch), | where each dot may be one of at least 16 shades of grey. | We may have a requirement for a similar color device in the future. | Both paper and transparent media are required, and all media must meet | stability criteria. The output device must employ a technology | which avoids reproducibility problems when different types of media | are used and as the output device ages. | The output device must be able to produce copies which are any of | ISO sizes A0 through A4 or ANSI sizes A through E. | | Note: large format photographic film recorders will be considered | if the final copies conform to our output specifications. | | If you are interested, please contact John Williams, address below. | | johnw@ssi-h.pegasus.com John Williams | Seafloor Surveys International, Inc. | Phone: (808) 537-9561 1221 Kapiolani Blvd., Ph-40 | Fax: (808) 523-5958 Honolulu, Hi. 96814 -- ,u, Bruce Becker Toronto, Ontario a /i/ Internet: bdb@becker.UUCP, bruce@gpu.utcs.toronto.edu `\o\-e UUCP: ...!uunet!mnetor!becker!bdb _< /_ "Que es mas macho: moral fiber, o oat bran?" - lala