| Environments | MODELER EASI |
| Sections | Description Parameters Parameter Details Details Example Related |
Transfers image data held in a PCIDSK database file to an SCITEX Continuous Tone Picture (CT) format file.
| Name | Prompt | Type | Length |
|---|---|---|---|
| FILI | Database Input File Name | Char | 1 - 192 |
| DBIC | Database Input Channel List | Int | 1 - 3 |
| DBLUT | Database Lookup Table Segment | Int | 0 - 3 |
| FILO | Database Output File Name | Char | 1 - 192 |
| SCISEPAR | Separations: CMY/CMYK/C/M/Y/K | Char | 0 - 4 |
| SCISIZE | Size of Output Map in mm/cm/inch | Char | 1 - 64 |
| MONITOR | MONITOR mode: ON/OFF | Char | 0 - 3 |
Specifies the name of the PCIDSK file which holds the image data:
EASI>FILI="file_specification"
Lowest value: 1 Highest value: 1024
Specifies the image channels on the database to transfer to the SCITEX CT format file:
EASI>DBIC= i |for a single separation EASI>DBIC= red, green, blue |for color images
If a single channel is specified, then it is written to the CT file as a C, M, Y, or K separation (as specified by the SCISEPAR parameter).
If three channels are specified, then these are assumed to be red, green, blue and are converted to CMY or CMYK separations (as specified by the SCISEPAR parameter).
SCIWRIT expects 8 bit imagery. If 16 bit or 32 bit data is used then it should be pre- enhanced to the range between 0 and 255.
Optionally specifies one to three Lookup table segments (LUTs, type 170) which are used to enhance the image channels (which were specified in parameter DBIC) before they are written to the SCITEX CT format file.
EASI>DBLUT= | do not enhance, use imagery as is EASI>DBLUT=i,j,k | enhance imagery using LUT's i,j,k
Specifies the name of the SCITEX format file to be created to hold the output imagery. FILO must NOT exist before running SCIWRIT; it will be automatically created.
EASI>FILO="file_specification"
Valid Values: C,M,Y,K,CMY,CMYK Default: C (Cyan)
Specifies the separations which should be written to the SCITEX CT file.
If a single layer is provided, then it can be written as a C, M, Y, or K (Cyan, Magenta, Yellow or Black) separation.
If three layers are provided, then they can be written as CMY or CMYK separations.
C | Cyan M | Magenta Y | Yellow K | Black CMY | Cyan,Magenta,Yellow CMYK | Cyan,Magenta,Yellow,Black
Valid Values: <string, max. 64 characters> Default: <none>
Specifies the size (width,height) and units (mm/cm/inch) of the image:
"width units, height units"
For example:
"10mm,10mm" | Millimetres "10cm,15cm" | Centimetres "5.1in,9.6in" | Inches
Program progress can be monitored by printing the percentage of completed processing in odometer fashion. A system parameter, MONITOR, controls this activity:
EASI>MONITOR="ON" | turn monitor ON (default)
EASI>MONITOR="OFF" | turn monitor OFF (recommended if
| running in batch/background mode)
SCIWRIT creates a SCITEX Continuous Tone (CT) format Picture file (FILO) from imagery contained in a PCIDSK database file (FILI). The created CT file is usually then passed to a SCITEX system for printing.
One or three PCIDSK image channel(s) (DBIC) may be converted to SCITEX format file at a time. An enhancement can be applied to the image channels as they are written to the CT file using Lookup tables (DBLUT).
SCISEPAR specifies the separations desired. For single channels, there can be a single separation: C, M, Y, or K (Cyan, Magenta, Yellow or Black). For three channels, either CMY or CMYK separations can be written.
Note: if CMY is specified, then four separations are still written to the CT disk file, however the K (black) separation is uniformly set to the value 255, which indicates no black.
SCISIZE specifies the size of the final printed image.
The algorithm conversion for RGB to CMY is given below:
Cyan = Red Magenta = Green Yellow = Blue Black = 255
The algorithm conversion for RGB to CMYK is given below:
Black = maximum (red, green, blue) Cyan = Red + 255 - Black Magenta = Green + 255 - Black Yellow = Blue + 255 - Black
SCIWRIT creates a SCITEX Continuous Tone (CT) picture file on disk. The layout of the file matches the Floppy Diskette format described in the 'HandShake Foreign File Transfer Protocol' manual available from SCITEX Corporation.
A quick overview of this format is shown below:
+-----------------+
| Control Block | 256 bytes
+-----------------+
| Unused | 768 bytes
+-----------------+
| Parameter Block | 256 bytes
+-----------------+
| Unused | 768 bytes
+-----------------+
| Row 1 |
+-----------------+
| Row 2 | Data
+-----------------+
: :
+-----------------+
| Last Row |
+-----------------+
The 256 bytes of the Control Block contain:
Bytes Field Name Description 1-80 NAME File Name (Only 20 characters used) 81-82 FILE TYPE 'CT' 83-94 DBSIZE Data block size (always 1024) 95-106 Reserved 107 ICONT Tape number (always 0) 108-256 Reserved
The 256 bytes of the Parameter Block contain:
Bytes Field Name Description 1 UNITS Units of measurement (0=mm) 2 NUMSEP Number of color separations (1 - 16) 3- 4 EXSEP Bit Mask of existing separation 5-18 HEIGHT Size of Image Data in Y- direction (UNITS) 19-32 WIDTH Size of Image Data in X- direction (UNITS) 33-44 HPIX Number of lines 45-56 WPIX Number of pixels 57 SCAN DIR Scan Direction 58-256 Reserved
The general pixel data organization is called "Line Interleaved" which means row after row in increasing Y order.
Within each row, each separation is contiguous. Separations are ordered: cyan, magenta, yellow and black.
If the number of pixels in the X - direction is odd, an extra 0 (zero) byte is added at the end of each separation within a row.
The user wishes to transfer a 512 pixel by 512 line copy of data held in the PCIDSK database irvine.pix to a SCITEX CT format disk file. Channels 3, 2, and 1 from irvine.pix (which represent RGB) will be transferred into CMYK separations (Cyan, Magenta, Yellow, Black). Segments 4, 3 and 2 on file irvine.pix contain Lookup tables to enhance the imagery. The user wishes the image to eventually be printed as a 300 mm x 300 mm picture.
EASI>FILI = "irvine.pix" EASI>DBIC = 3,2,1 EASI>DBLUT = 4,3,2 EASI>FILO = "irvine.ct" EASI>SCISEPAR = "CMYK" EASI>SCISIZE = "300mm,300mm" EASI>RUN SCIWRIT
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