1 PRINT "[147]   KOALA-VERTER/PRINTER INSTRUCTIONS"
2 LIST
3 :
4 :BY DR. JIM ROTHWELL & DAN ROTHWELL
5 :PERMISSION GRANTED FOR PERSONAL USE
6 :ALL COMMERCIAL RIGHTS RESERVED
7 :
8 :   KOALA-VERTER CONVERTS FULL-COLOR KOALA PAD PICTURES INTO A BLACK&WHITE
9 DOT PATTERNS WHICH CAN PRINT ON A STANDARD CBM 1525 GRAPHICS PRINTER.
10 :
11 K-V PRINTER READS IN THE CONVERTED PICTURES FOR PRINTING, AND ALLOWS THE
12 PICTURE TO BE EXPANDED IN EITHER VERTICAL OR HORIZONTAL DIRECTIONS.
13 :
14 :   FIRST, RUN KOALA-VERTER.  THE PROGRAM WILL PROMPT FOR INSERTION OF A DISK
15 CONTAINING KOALA PICS. USE THE SAMPLE PROVIDED (JUNGLE) OR INSERT YOUR OWN
16 DISK CONTAINING ANOTHER PROGRAM.
17 :
18 THEN, PRESS RETURN .
19 :
20 AFTER READING AND ANALYZNG THE PICTURE, THE KOALA VERSION WILL BE DISPLAYED
21 IN COLOR ALONG WITH A TABLE OF THE SIXTEEN POSSIBLE COLORS.
22 SELECT A COLOR TO BE EXTRACTED FROM THE PICTURE; BLACK, FOR EXAMPLE.
23 :
24 THE NEXT MENU REQUESTS A DOT-PATTERN TO BE SUBSTITUTED FOR THE BLACK AREAS.
25 SELECT ONE, SUCH PATTERN (A).
26 THE PICTURE WILL BE SCANNED BOTTOM TO TOP, EXTRACTING THOSE BLACK AREAS AND
27 CREATING A NEW PICTURE CONTAINING THE (A) PATTERN WHERE BLACK OCCURRED IN
28 THE KOALA PICTURE.
29 :
30 :   NOTE THAT THE PATTERN WE SUBSTITUTE FOR COLORS IN THE KOALA PICTURE IS
31 A 2-BY-2 DOT PATTERN, ALLOWING US 8 POSSIBLE CHOICES FOR OUR BLACK & WHITE
32 VERSION OF THE PICTURE.  THIS METHOD OF REPRESENTING SHADING INFORMATION BY
33 MEANS OF DOT PATTERNS IS CALLED DITHERING. MOST IMPORTANTLY, WE HAVE
34 CONTROL OVER HOW THE VARIOUS COLOR AREAS ARE REPRESENTED IN THE FINAL PRINT.
35 BEING NATURALLY CREATIVE, WE CAN DECIDE WHICH AREAS SHOULD CONTRAST AND
36 WHICH SHOULD BLEND.  IN THIS WAY (READ 'TRIAL AND ERROR' HERE),  WE WILL
37 FIND THE COMBINATION OF DOTS WHICH BEST REPRESENTS WHAT THE PICTURE SAYS.
38 :
39 :   AFTER EXTRACTING A COLOR AND VIEWING THE RESULTS, WE MAY ACCEPT IT (BY
40 PRESSING RETURN) OR REJECT IT BY SELECTING ANOTHER PATTERN TO SUBSTITUTE.
41 :
42 NOTE THAT THE MENU AT THE BOTTOM OF THE SCREEN MAY BE TOGGLED ON AND OFF
43 USING THE F7 KEY SO YOU CAN SEE THE FULL AREA OF THE SCREEN.
44 :
45 :   ONCE AN EXTRACTION HAS BEEN ACCEPTED, IT (null)ES INTO THE 'FINAL' PRINT.
46 EACH SUCCEEDING EXTRACTION WILL BE ADDED TO THE PREVIOUS ONES TO BUILD THE
47 PICTURE.  COLOR SEPERATIONS COULD BE MADE BY SAVING AND PRINTING EACH
48 EXTRACTION BY ITSELF.
49 :
50 :   EXPERIMENT WITH PATTERN-SUBSTITUTION ON VARIOUS PICTURES TO GET A FEEL
51 FOR WHAT WORKS.  EXPERIENCE SUGGESTS THAT SINGLE-DOT AREAS DON'T PRINT WELL
52 ON A 1525; CLUSTERS OF DOTS TWO-OR-MORE WIDE SEEM TO WORK BETTER.
53 ROW-TO-ROW REGISTRATION OF DOTS WILL VARY FROM PRINTER TO PRINTER, ALSO.
54 :
55 WHEN READY TO PRINT, PRESS F1 TO EXIT AND SAVE THE PICTURE.
56 IT WILL NOW BE A FULL 8K HIGH-RESOLUTION PICTURE, LOADING AT $2000.
57 :
58 :
59 LOAD AND RUN K-V PRINTER.
60 :
61 NOTE:  K-V PRINTER SUPPORTS ONLY 1515/1525 PRINTERS.
62 :
63 USING THE MENU, LOAD YOUR DITHERED PICTURE.  THEN VIEW IT.
64 :
65 :    WHEN VIEWING, ANY KEY TAKES YOU BACK TO THE MENU.
66 :
67 NOW PRINT IT.
68 :
69 THE PICTURE WILL BE TURNED SIDEWAYS TO BETTER FIT THE PAPER AND ALLOW ROOM
70 FOR EXPANSION.  UNEXPANDED PICTURES, BEING SMALLER, PRINT FASTER AND ARE
71 RECOMMENDED FOR 'FIRST DRAFTS.'  MORE IMPORTANTLY, THE RIBBON WILL LAST
72 LONGER.  YOU MAY EXIT FROM PRINTING AT ANY TIME BY PRESSING THE STOP KEY.
73 :
74 UPON EXIT FROM KOALA-VERTER AND K-V PRINTER THE 8K HI-REZ PICTURE REMAINS
75 INTACT IN RAM AT $2000 FOR THOSE WHO WISH TO USE IT.