abbyy-software formreader Guía Del Usuario
(a)
(b)
The advantages and disadvantages of raster field borders are the same as for raster background.
Black&white linear forms
Field borders, in the case of linear black&white forms, remain on the scanned image. This means that during
recognition the application has to first separate the field borders from the field contents, then recognize the content.
The following field border marking types are available on machine-readable forms:
Field borders, in the case of linear black&white forms, remain on the scanned image. This means that during
recognition the application has to first separate the field borders from the field contents, then recognize the content.
The following field border marking types are available on machine-readable forms:
Field marking type
Name
Text above line
Text in a frame
Letters in separate frames
Letters in frames
Text in a comb-notch
Text in a frame with comb-notch
Advantages and disadvantages
Advantages
1. The forms are very easy to design; various graphic editors and word processors can be used to create them,
including Microsoft Visio, Corel Draw, and Microsoft Word.
Disadvantages
1. If the forms are completed carelessly, letters may overlap the field borders, thus reducing recognition
quality. This is because whenever the field content overlaps the field borders, it is extremely difficult for
the application to separate the borders from the text. Recognition quality is therefore highly dependent on
neat completion of the form.
the application to separate the borders from the text. Recognition quality is therefore highly dependent on
neat completion of the form.
Each one of the field marking types mentioned above has in addition a number of its own advantages and
disadvantages. These are described below:
1) Text above line
The major disadvantage of this field border type is that it does not “discipline” the person completing the form i.e.
he is free to write as he wishes. The system, however, can only recognize characters written separately (fig.(а)
below), and joined-up writing (fig.(b)) is likely to result in low recognition quality.
disadvantages. These are described below:
1) Text above line
The major disadvantage of this field border type is that it does not “discipline” the person completing the form i.e.
he is free to write as he wishes. The system, however, can only recognize characters written separately (fig.(а)
below), and joined-up writing (fig.(b)) is likely to result in low recognition quality.
(a)
(b)
2) Text in a frame
The same disadvantages apply to this border type as to the previous one, however the presence of an enclosing
frame indicates the area in which information should be entered (vertical and horizontal borders) – and this is the
only advantage of this marking type.
Good recognition quality can again only be achieved if the fields are completed using separate characters, and not
touching the borders (see fig. (a) below). If this is not the case (for example, as on fig.(b) below), recognition quality
will be adversely affected.
The same disadvantages apply to this border type as to the previous one, however the presence of an enclosing
frame indicates the area in which information should be entered (vertical and horizontal borders) – and this is the
only advantage of this marking type.
Good recognition quality can again only be achieved if the fields are completed using separate characters, and not
touching the borders (see fig. (a) below). If this is not the case (for example, as on fig.(b) below), recognition quality
will be adversely affected.