Recognition of characters and annotations on engineering drawings
Jihong Guan · Computer Engineering and Applications Journal · 2012
Recognition of characters and annotations on engineering drawings is very important to automated processing of engineer drawings. It is the precondition and foundation of size and image understanding. A new algorithm is presented for recognition of characters and annotations which is based on pre-cut characters and annotations mainly focusing on the recognition, location and extraction. By preserving the logical relations of characters and graphic annotations, what could have are coordinates of characters through complanation and denoising.