Project
Our objective was to create Korean OCR(Optical Character Recognition) System.
Hangul
The native alphabet of the Korean language is called Hangul. It is a phonemic alphabet organized into syllabic blocks. Each block consists of at least two of the 24 Hangul letters (jumo), with at least one each of the 14 consonants and 10 vowels. In Korean language no letter may stand alone. Instead,they are grouped into syllabic or morphemic blocks of at least two and often three:
- a consonant or a doubled consonant called the initial,
- a vowel or diphthong called the medial, and, optionally,
- a consonant or consonant cluster at the end of the syllable, called the final
When a syllable has no actual initial consonant, the null initial ieung is used as a placeholder. Thus, a block contains a minimum of two jamo, an initial and a medial.
Normally the resulting block is written within a square of the same size and shape as a hanja (Chinese character) by compressing or stretching the letters to fill the bounds of the block.
Our work
How was it day by day...
Friday
- getting familiar with Korean language
- obtaining input text for our work, obtaining alphabet
- creating procedure of dividing text into lines using vertical projection (matlab)
- meeting problems for OCR - connections between letters in a syllable, one letter appears in different scale
Saturday
- creating procedure of dividing lines of text into single characters using horizontal projection (matlab)
- creating database of letters: each character is stored as an: image, xproj, yproj, phonetically representation
- proposing skeletonization and application of topological features in order to distinguish characters, choosing needed features:
- number of components
- number of endpoints
- direction of endpoint
- number of branch points
- number of corner points
- tested correlations between projection of letters and same examples of complex characters - without success
- tested correlations between projection of letters and projection of some consonants- with success