*** UNIX MANUAL PAGE BROWSER ***

REBECCA(9.1) REBECCA(9.1) NAME rebecca - graphics touch-up editor SYNOPSIS rebecca file DESCRIPTION Rebecca is an interactive retouching tool for digitized grey-scale im- ages. The file must be a headerless 512x512 black-and-white digitized image. Example (read only) files are in directory `Floating instruments' for editing can be dragged with button 2 to dif- ferent locations. Resolution. The tick mark on the long bar can be moved up or down with button 1. Printed to the right of the bar is the current resolution-- a power of 2 representing the number of file pixels across the screen image. Grid. Click button 1 at the circular button to toggle the grid. Turn- ing on the grid is useful sometimes to see how fast a screen update is proceeding: it eats away the grid. Write. Write the file on the host by clicking button 1 at the box la- beled The write box has a if a change was made to the file since it was last written. Runlength encoding. Clicking button 1 at this box toggles the mode of data transmission between host and terminal. Reopen. This instrument cancels any changes made to the file since the last time it was written. Move/Pan. Click button 1 at one of the 5 areas of the diamond. The middle resets the display to a full size picture. Left, right, up, or down will move (pan) 1/4 screen in the corresponding direction (useful only on zoomed pictures). Zoom/Unzoom. Click button 1 at (zoom) or (unzoom). prompts with a square box to be positioned on the area of the picture to be inspected at full resolution. If you click button 1 before you confirm, the sides of the box are halved. Clicking button 2 doubles them. Any com- bination of two buttons cancels the zoom; button 3 confirms it. Paint. Click button 1 at the box labeled Painting with adds grey val- ues to pixels; assigns values; subtracts values. Click button 1 at a pixel location to apply the paint. Click button 3 to sweep a rectangle to paint all pixels within it. Pick a paint value (default is white) by clicking button 2 at the grey scale at the bottom or at any pixel in the image. Click button 2 at the paint box to cancel the paint mode. Smear. Pointing at a pixel with both buttons 1 and 2 down averages it with its 8 neighbors (most useful when zoomed in to pixel level). Typ- ical usage: apply some white or black paint with the paint box, then smear it. Probe. Click button 1 at the probe box Point at a pixel in the image. The x-y coordinates and the greyscale value of the pixel will be printed. Contrast. Move the ends of the line under the grey scale bar to expand or compress the grey scale. Rubber Sheet. The box named prompts for a rectangle. Sweep out the rectangle over an area you want to manipulate, then reposition the cor- ners by dragging them to new locations with button 1. Confirm the se- lection with button 3. Other instruments are usable while the update proceeds. SEE ALSO pico(1), flicks(9.1), picfile(5), flickfile(9.5) REBECCA(9.1)