NEW TECHNIQUE FOR SKEW ANGLE DETECTION OF TEXT IN IMAGE DOCUMENT
Khalil Alsaif, Montaha Tariq Alsarraj · 2013
Image text document can be acquire via scanner or other type of machines which cause sometime a skew angle (alignment) on its horizontal direction so many techniques were developed to treat that skew. In This Research a new idea based on Fan filter will be achieved to detect the skew angle of a text image. A fan filter will be designed in different level and size to be suitable to decompose the image to its component with the same number of filter level, then looking for which coefficients hold the highest energy. The skew angle of the text image will be extracted from The fan filter component rank which match the highest energy component in the image slices. The proposed algorithm applied on different type of skew with different images. The difference between the measured angle and the actual angle in the range of ± 1.5o. the proposed algorithm was simulated using Matlab software Version (R2011a).