Processing arabic font using cubic spline with periodic end conditions

The article constitutes the outlines capture of the digital Arabic character images which is appropriate for non-Roman (Arabic) fonts. The external boundaries of Arabic font character (ع) have been traced and boundaries of holes of a specific Arabic characters such as (و), the three interpolated curves of the Arabic character (ه). For (ك) character trace parent (ل) and their child (ء) and (..) in Arabic character ((ي) were outlined by the modification of Jacobs stopping criteria along with the tracing Moore-Neighbor algorithm. Moreover, a new algorithm has been presented using picewise cubic Hermite spline interpolation (PCHIP) to process the margins of characters and shapes. This algorithm is significant in computer graphics. Sample plots have been included to illustrate the power, effictiveness and flexiblility of this algorithm. Hermite spline algorithm is more suitable for few nodes on the outline of characters or shapes. The modified algorithm can be categorized in terms, types: capture a given set of data points.