parameters which allows to the classification of the check model. Each model is described by position of these areas and its image background. After, the determination of the check model, the elimination the bottom of check is done. In result, binary images of handwritten of each area are obtained [12].

Method based on recognition of the writing ن This method consists in detecting connected components of the document image according to the gray levels. It proceeds by certain characteristics of these components measuring manuscripts, in order to decide if it is a handwritten or printed writing by recognition of some words [8].

D.

Method based on detection of the connected  components This method is based on mathematical morphology transformations by the use of physical and logical structure. It builds connected components by the applicant's morphologic transformation. It makes possible to label the connected components and to build a mask of the sought area in order to extract the literal amount area from original check. This method is applied on grey level images [4].

## Proposed Method Iii.

The proposed method is applied on Tunisian bank check. It requires the following steps:
Physical and logical analyze of the check structure
•
.

Pre-processing of the check image
.

Extraction of the marking band  of the check Recognition of the the bank code by Fourier descriptors
.

Extraction of  handwritten zones by difference
.

.

Localization of each area starting from its physical site Improvement of areas limitation
.

 Physical and logical analyze of the check structure A.

The logic design of the bank check generally and the Tunisian check in particular is standardized by the central bank as it is presented in figure 1.

The check includes two parts:
A part witch contents the textual data and called body
.

of the check.

.

A white part called band marking zone, reserved for the magnetic encoding. It is located in the bottom and over the whole length of the check. Its width is equal to 16 m.

![0_image_2.png](0_image_2.png)

l)
Body content The physical and logical structure is presented by the figure2.

![0_image_0.png](0_image_0.png)

Physical and logical structure
. .

- .

.

.

. .

.

o Characteristics of the marking band 2)
The marking band is the second component of the check. It should contain only data codified and marked obligatorily in characters CMC7. CMC7 is a magnetic coding norm. Figure 3 presents an example of marking band of a check coming from the Tunisian Company of Banks (STB).

![0_image_1.png](0_image_1.png)

Figure 3.

Bank check (STB)
Area 1 : It contains generally printed and handwriting script. It represents the digital amount.

Area 2 : It contains printed writing and images. It represents the name of the bank.

Area 3 : It contains printed digits. It represents the nmber of the check.

Area 4 : It contains handwriting and printed script. It represents the literal amount.

Area 5 : It contains handwriting and printed script. It represents conductor name.

Area 6 : It contains an image and represents the signature of the scripter.

Area 7 : It contains printed digits. It represent the account number. Area 8 : It contains printed and handwriting script. It represents the date.

Area 9 : It contains printed script and digits. It represents the address and the phone number of the bank.

Area 10 : It contains generally digits and represents the marking band.