Apple Newton Programmer’s Newton 2.0 (for Newton 2.0) - Manual (Page 389)

C H A P T E R 1 0
Recognition: Advanced Topics
Using Advanced Topics in Recognition 10-13
Manipulating Dictionaries 10
You can control the view’s use of dictionaries by including in your recConfig
frame the dictionaries , rcSingleLetters , or
inhibitSymbolsDictionary slots as appropriate. These slots are described in
“protoRecConfig” (page 8-36) in Newton Programmer’s Reference.
Single-Character Input Views 10
When recognizing single characters, the recognizer sometimes has difficulty
determining individual characters’ baseline or size; for example, it can be difficult
to distinguish between an upper case
P and a lower case p when relying strictly on
user input. If you know where the user will be writing with respect to a
well-defined baseline, you can provide an
rcBaseInfo or rcGridInfo frame to
specify to the recognition system precisely where characters are written.
The rcBaseInfo Frame 10
The rcBaseInfo frame is especially valuable in improving the recognition of
single characters, for which it is sometimes difficult to derive baseline or letter-size
values from user input.
Figure 10-3 depicts the editing box that an rcBaseInfo frame defines.
Figure 10-3 Single-character editing box specified by rcBaseInfo frame
The NewtonScript code used to create the baseline information for the editing box
shown in Figure 10-3 looks like the following example.
rcBaseInfo := {
base: 140,// global y-coordinate of baseline
smallHeight:15,// height of a lower case x
bigHeight:30,// height of an upper case X
descent:15,// size of descender below baseline
};
base
descent
smallHeight
bigHeight