6-dec-79 N.C.A.R Boulder, colorado (303)-494-5151 x718 Bob Brown This briefly describes IMG the image manipulation utility. It may be used with its companion SHO. IMG is designed to move images from device to device and to and from FILES-11 devices as well. The implementation can be used with most any video display device with 512x512 organization. Other display formats may be easily accomdated provided that small parametric changes are made to IMG source. The pixel resolutions handled are 8 bit byte and 1 bit . Others could be handled with reworking of source. The first implementation handles features of the COMTAL Vision 1 display which has 3 images planes and 4 graphic overlay planes as well as a function memory for each image and a color table for psuedo-color enhancement. The image planes are addressed as CD:,CD1:,CD2: but if the user has ASNed logical names ,ie. ASN CD:=IM1:/GBL ,the logical should be used as they make it easier on the user. The color and function memory tables are in CD7: thru CD14:. ALL units are directly addressed,even though they are not 512x512 by 8 bits. The image memory planes may be reassigned to be IM1:, IM2:,IM3: because people dont like to think of plane 1 as unit 0. It should be easy to use the code in a RSX-11 system where more or less image or graphic memories are present. The only QIO required to be recognized by the device IO.RLB/IO.WLB for standard raster line moves of data. The QIO must include as parameters the starting Y line # and X byte element #. Currently the X byte element is always zero,(and not honored by the driver). QIO$s #IO.RLB,lun,lun,,iosb,,<#BUF,NBYTES,,,YLINE,X> To assemble the code: MAC @IMGASM There are 2 fortran subroutines CONVOL & GRAPHL they work when compiled with F4P x=x/-TR. I dont know what will happen with FOR To Compile the 2 subs: F4P @IMGCMP To build the task: TKB @IMG Example of command strings in EDGE.CMD extracts edge information from an image USER SITE MODIFICATIONs: The printer spooled to is a PRINTRONIX 300 which has 780 dots across each row, the 512 images are there printed as 1 bit deep graphics using only the 1st 512 dots. The code GRAPHL.FTN formats the graphics line into the bit patterns the printer wants to see ,could be modified for Versatec or Gould easily. The CONVOL.FTN code is simple Fortran for implementing the digital convolver as a 3x3 kernel that moves over the data. It can easily be enhanced and perhaps speeded up greatly by others or add different filtering modes. KNOWN ERRORS:/AP - does not appear to actaully append to the end of an exisiting file. /FL - FILE n on mag tape seems to work. To date no glaring errors are apparent although some combinations of switches may produce bizarre results. Currently errors are reported but the exact cause,ie. 'PRIVELEDGE VIOLATION' is not. This will be enhanced later as will be portability. Some switches in some strings will be ignored without error comment if the code does not expect them in the current context. ************************************************************ To assemble SHO: MAC @SHOASM To build SHO TKB @SHO This code SHO is specific for the Comtal Vision One but could be altered for another display . end of readme.1st