Apple Newton Utilities User's Guide download pdf (Page 389)

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101

CHAPTER 10

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

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