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1.1 root 1: .TH REBECCA 9.1
2: .CT 1 editor graphics
3: .SH NAME
4: rebecca \- graphics touch-up editor
5: .SH SYNOPSIS
6: .B rebecca
7: .I file
8: .SH DESCRIPTION
9: .I Rebecca
10: is an interactive retouching tool for digitized grey-scale images.
11: The
12: .I file
13: must be a headerless 512\(mu512 black-and-white digitized image.
14: Example (read only) files are
15: in directory
16: .FR /n/kwee/t0/face/512x512x8 .
17: .LP
18: `Floating instruments' for editing
19: can be dragged with button 2 to different locations.
20: .LP
21: .I Resolution.
22: The tick mark on the long bar
23: can be moved up or down with button 1.
24: Printed
25: to the right of the bar is the current resolution\(em
26: a power of 2 representing the number
27: of file pixels across the screen image.
28: .LP
29: .I Grid.
30: Click button 1 at the circular button to toggle the grid.
31: Turning on the grid is useful sometimes to see how
32: fast a screen update is proceeding: it eats away the grid.
33: .LP
34: .I Write.
35: Write the file on the host by clicking button 1 at the box labeled
36: .LR write .
37: The write box has a
38: .L *
39: if a change was made to
40: the file since it was last written.
41: .LP
42: .I Runlength encoding.
43: Clicking button 1 at this box toggles the mode of data transmission
44: between host and terminal.
45: .LP
46: .I Reopen.
47: This instrument cancels any changes made to the file
48: since the last time it was written.
49: .LP
50: .I Move/Pan.
51: Click button 1 at one of the 5 areas of the diamond.
52: The middle resets the display to a
53: full size picture.
54: Left, right, up, or down will move (pan) 1/4 screen in the
55: corresponding direction
56: (useful only on zoomed pictures).
57: .LP
58: .I Zoom/Unzoom.
59: Click button 1 at
60: .L Z
61: (zoom) or
62: .L U
63: (unzoom).
64: .L Z
65: prompts with a square box to be positioned on the area
66: of the picture to be inspected at full resolution.
67: If you click button 1 before you confirm, the sides
68: of the box are halved.
69: Clicking button 2 doubles them.
70: Any combination of two buttons cancels the zoom;
71: button 3 confirms it.
72: .LP
73: .I Paint.
74: Click button 1 at the box labeled
75: .LR "+ = -" .
76: Painting with
77: .L +
78: adds grey values to pixels;
79: .L =
80: assigns values;
81: .L "-"
82: subtracts values.
83: Click button 1 at a pixel location to apply the paint.
84: Click button 3 to sweep a rectangle to paint all pixels within it.
85: Pick a paint value (default is white) by
86: clicking button 2 at the grey scale at the bottom
87: or at any pixel in the image.
88: Click button 2 at the paint box to cancel the paint mode.
89: .LP
90: .I Smear.
91: Pointing at a pixel with both buttons
92: 1 and 2 down averages it with its
93: 8 neighbors (most useful when zoomed in to pixel level).
94: Typical usage: apply some white or black paint with the paint box,
95: then smear it.
96: .LP
97: .I Probe.
98: Click button 1 at the probe box
99: .LR P: .
100: Point at a pixel in the image.
101: The
102: .I x-y
103: coordinates and the greyscale value of the pixel will be printed.
104: .LP
105: .I Contrast.
106: Move the ends of the line under the
107: grey scale bar to expand or compress the grey scale.
108: .LP
109: .I Rubber Sheet.
110: The box named
111: .L sheet
112: prompts for a rectangle.
113: Sweep out the rectangle over an
114: area you want to manipulate, then reposition the corners
115: by dragging them to new locations with button 1.
116: Confirm the selection with button 3.
117: Other instruments
118: are usable while the update proceeds.
119: .SH "SEE ALSO"
120: .IR pico (1),
121: .IR flicks (9.1),
122: .IR picfile (5),
123: .IR flickfile (9.5)
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