Casio YC-400 User Manual page 8

Precautions when Using the PJ Camera Software
I Contour Extraction
Contour extraction uses brightness contrast to extract the rectangular shapes in an image.
Though the Multi PJ Camera System can adapt to a wide range of conditions, certain types
of documents may not be compatible with automatic contour detection. The following are the
conditions that promote successful automatic contour detection.
Make sure the room is lit sufficiently.
Place the document in the center of the document stage, and make sure that no part of it
is extending off of the stage.
Make sure the document is free of creases and curls, and is either rectangular or square.
Make sure the document is free of creases and wrinkles.
Use only documents that are within the stipulated range of sizes (from business card size
to A4 (210 × 297mm)(8.3 × 11.7inch)/Letter size).
Use documents whose color provides sufficient contrast with the document stage color. Also,
the color surface of the table where the PJ Camera Stand is located should be a different
color from the document stage.
Place the PJ Camera Stand on a surface that does not reflect light.
When placing a document onto the document stage, make sure the document is relatively
straight (tilted no more than about 30 degrees).
Tip
Check for the following if you experience occasional contour detection problems.
In the case of a color document, is there sufficient color contrast around the contours?
If not, use a setting that does not perform contour extraction.
Is room lighting too dim to allow adequate contour contrast detection?
Increase the level of room lighting or use a setting that does not perform contour extraction.
Is part of the document outside of the document stage area?
Re-position the document taking care to ensure that no part of the document extends past
the edges of the document stage. Make sure that the entire document is within the area of
the document stage.
The document is curled or bent.
Flatten the document so it forms a rectangle or square.
Tip
Check the following points if contour detection does not work at all.
Is the document smaller than the specified size?
If it is, extraction cannot be performed.
Is the document in the center of the document stage with no part of the document
extending off the sides of the stage?
Position the document in the center of document stage and ensure that no part of it extends
off the sides.
8