Modeling Nasta leeq Writing Style

Size: px

Start display at page:

Download "Modeling Nasta leeq Writing Style"

Jemima Blair
5 years ago
Views:

1 Modeling Nasta leeq Writing Style Aamir Wali National University of Computer and Emerging Sciences

2 Overview: Urdu اب پ ت ٹ ث ج چ ح خ د ڑ ڈ ذ ر ز ژ س ش ص ض ط ظ ع غ ف ق ک گ ل م ن ه ء ی ے ہ ں و In Urdu, a character has different shape in the isolated, initial, medial and final position ب با قبا قب

3 Nasta leeq Writing Style A way of writing Urdu Has its own unique set of rules

4 Nasta leeq Writing Style

5 B ار داث ا م ÿن 8 ñ م ں- آپ ñ آ ñ ÿن 8 : aے : aے م a > ÿ : aے ñ از : aؤرث hاناؤر 5 ñ ؤ M êc ñ آپ a > < ÿن< ں hح دن ñ آپاس ã < راثاس ال 6 ñ اس ا ñ ñ

6 ؤ h7 ا ؤا h د ا ا و ر ع و ا

7 DEVELOPMENT PROCESS

8 Font Development Process Data/Sample Collection Calligraphic Writing Logical Modeling Shape Analysis Mark Analysis Proportional Spacing

9 Font Development Process (contd.) Physical Modeling Scanning Vectorization Segmentation Generation of True Type Font File Embedding of OpenType Tables Testing Release

10 Things to Discuss Data/Sample Collection Calligraphic Writing Logical Modeling Physical Modeling Testing

11 Logical Modeling Shape Analysis Segments Identification Grammar Formulation Mark Analysis Nuqtas Aerabs Special Symbols Baseline Shifting Proportional Spacing

12 Shape Analysis

13 Shape Analysis

14 Shape Analysis

15 ShapeAnalysis(contd.)

16 Segmentation Visual Approach Calligraphic Approach

17 Segmentation (contd.)

18 Segmentation (contd.)

19 Segmentation: Visual Approach Storing the connector part with the final glyph

20 Segmentation: Calligraphic Approach The basic units of shapes as in calligraphers mind are considered

21 Comparison Calligraphic Technique Visual Technique Apparently Visual Technique is better

22 Comparison (contd.) Where initial glyph are reduced, final forms increase Visual Approach Calligraphic Approach Purpose is not to make a font BUT a realization of Nasta leeq in its True Form

23 Shapes Identified: Initial Forms Ligatures Corresponding Shapes

24 Shapes Identified: Final Forms Some are easy to extract Others have a high degree of undefined merge ê h Such final forms are difficult to form. They are cut up pieces extracted from ligatures

25 GRAMMAR FORMULATION

26 Shapes Identified: Initial Forms Ligatures Corresponding Shapes

27 Grammar Formulation Class <A> Context After ادکللا ب ج ر س Shapes

28 ف ف ف ف ف ف Context Sensitive Grammar / {ادکللا} <> / / ب / ج / ع / ن

29 NUQTA ANALYSIS

30 Nuqta Analysis Nuqta Cases Intra Ligature Nuqtas Displaced Inter Ligature

31 Nuqta Analysis (Contd.) Case Case 2

32 Marks Observations Isolated and Final Forms No collision, No shifting Other Forms Collision with previous letter or Nuqta

33 Modeling Isolated and Final Forms Store nuqta with the base glyph Initial and Medial Forms Separate the nuqta from the base glyph Store them separately Combine them according to context if OTF specs permit

34 Things to Discuss Data/Sample Collection Calligraphic Writing Logical Modeling Physical Modeling Testing

35 Physical Modeling: Phases Scanning Vectorization Segmentation Generation of TTF File Embedding of OpenType Tables Glyph Inventory Generation

36 Scanning Conversion of Calligraphic text into a digitized form e.g. an image Calligraphic text Mufridaat Two Character Joins Initial & Medial Forms Recommended Scanning settings Resolution 100 dpi Mode Color Mode Scale 100% Scan Mode High Quality Picture Format Uncompressed 24- bit Windows Bmp

37 Vectorization: Introduction Glyphs are stored as their outlines represented by mathematical equations Common outline forms Type 1 based on 3 rd order Bezier curves TrueType based on 2 nd order splines Vectorization is the process of generating these outlines

38 Generation of TTF File Mostly glyph are stored in a specific file format of the font development tool TTF file is created by clicking generate font option usually in file menu of font tools Issues to be settled before generating font file Set font name Set interline spacing Set inter word spacing Set space width

39 Conclusion Data/Sample Collection Calligraphic Writing Logical Modeling Scanning Vectorization Generation of TTF File Embedding of OpenType Tables Testing

40 Subset of Nasta leeq

41 Calligraphy of Nasta leeq Initial Forms ک د ج ب ا ق Isolated Forms ابجدک Final Forms [ ] [ 9 6 ]

42 Thank you

43 Question & Answer

Nafees Nastaleeq v1.01 beta

Nafees Nastaleeq v1.01 beta Release Notes November 07, 2007 CENTER FOR RESEARCH IN URDU LANGUAGE PROCESSING NATIONAL UNIVERSITY OF COMPUTER AND EMERGING SCIENCES, LAHORE PAKISTAN Table of Contents 1 Introduction...4