Casio YC-400 User Manual page 31

Using the PJ System Like an OHP Projector (Document Camera Mode)
What is contour extraction?
Contour extraction is a process performed by PJ Camera Software to automatically detect the
outline of the document in a recorded image, and adjust the outline so the document is
straight.
Before contour extraction
(recorded image)
Contour extraction is performed automatically when Trapezoid Correction is turned on. You can
use any one of the operations below to toggle Trapezoid Correction on and off.
Display the operation bar, and then select [Trapezoid Correction On] on the [Image] menu
to toggle it on (check mark) and off (no check mark).
Display the operation bar and then click the
Trapezoid Correction on (
Press the space bar on your computer keyboard.
The initial default Trapezoid Correction setting depends on the startup mode you are
using, as shown below.
Multi PJ startup mode: On
Business Document startup mode: Off
(Trapezoid Correction) button to turn
) and off ( ).
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After contour extraction