Papers by Noushin Najafiragheb
Science and Research Pioneers Institute , 2017
Studies on handwriting recognition systems have gain a great attention since it has been consider... more Studies on handwriting recognition systems have gain a great attention since it has been considered as an important technology in computer science, especially that handwriting documents have continued to be the most used mean of communication and restoring information in human life. In this paper, a method for detecting the prescribed medications in physicians' handwritten prescriptions is presented. The K-nearest neighbor classifier is used to classify the medications in this study. Furthermore, the Gabor filter is used for feature extraction. To gain a better results, a preprocessing step is considered to improve the quality of extracted features. The simulation results show about 80 percent correct recognition rate on the test samples.
— Over the last five years optical character recognition approaches have been under gone an enorm... more — Over the last five years optical character recognition approaches have been under gone an enormous number of changes. Many efforts have been done and a wide range of algorithms have been used in order to improve the performance of existing methods of OCR in many languages. This paper presents an overview of feature extraction methods for character recognition in different texts. The feature extraction stage is an important component of any recognition system. It is also very much dependent on the task, input, and recognition algorithm used. The feature extraction methods are discussed in terms of invariance properties and expected distortions and variability of the characters.
ﭼﻜﻴﺪﻩ ﺗﺸﺨﻴﺺ ﺑﺮﺍي ﻋﺼﺒﻲ ﻓﺎﺯي ﺳﻴﺴﺘﻢ ﻳﮏ ﻃﺮﺍﺣﻲ ﻣﻘﺎﻟﻪ ﺍﻳﻦ ﻫﺪﻑ ﺑﺮﻧﺎﻣﻪ ﻳﮏ ﺗﻮ... more ﭼﻜﻴﺪﻩ ﺗﺸﺨﻴﺺ ﺑﺮﺍي ﻋﺼﺒﻲ ﻓﺎﺯي ﺳﻴﺴﺘﻢ ﻳﮏ ﻃﺮﺍﺣﻲ ﻣﻘﺎﻟﻪ ﺍﻳﻦ ﻫﺪﻑ ﺑﺮﻧﺎﻣﻪ ﻳﮏ ﺗﻮﺳﻌﻪ ﻣﻨﻈﻮﺭ ﺑﻪ ﺗﻮﺍﻧﺪ ﻣﻲ ﮐﻪ ﺑﺎﺷﺪ ﻣﻲ ﻟﺜﻪ ﻫﺎي ﺑﻴﻤﺎﺭي ﺗﺤﻘﻴﻘ ﺭﺍﺳﺘﺎي ﺩﺭ ﺩﻧﺪﺍﻧﭙﺰﺷﮑﺎﻥ ﺑﻪ ﮐﻤﮏ ﺑﺮﺍي ﮐﺎﻣﭙﻴﻮﺗﺮي ﺎﺕ، ﺑﻨﺪي ﻃﺒﻘﻪ ﺑﺮﺍي ﻧﻤﺎﻳﺪ. ﺷﺎﻳﺎﻧﻲ ﮐﻤﮏ ﺑﻴﻤﺎﺭي ﺍﻳﻦ ﺩﺭﻣﺎﻥ ﻭ ﺗﺸﺨﻴﺺ ﻋﺼﺒﻲ ﻫﺎي ﺷﺒﮑﻪ ﺍﺯ ﺑﻴﻤﺎﺭي ﺍﻳﻦ ﺍﻧﻮﺍﻉ ﮐﺮﺩﻥ PNN ﺍﻳﻢ. ﺑﺮﺩﻩ ﺑﻬﺮﻩ ﻣﻲ ﻧﺸﺎﻥ ﺣﺎﺻﻠﻪ ﻧﺘﺎﻳﺞ ﺍﺳﺘﻔﺎﺩﻩ ﺑﺎ ﺑﻴﻤﺎﺭي ﺻﺤﻴﺢ ﺗﺸﺨﻴﺺ ﺩﺭﺻﺪ ﺩﻫﺪ ﭘﻴﺸﻨﻬﺎﺩي ﺭﻭﺵ ﺍﺯ ۸۳,۷۵ ﺑﺎﺷﺪ. ﻣﻲ ﺩﺭﺻﺪ ﻭﺍﮊﻩ ﻛﻠﻴﺪي: ﻫﺎي ﻓﺎﺯي ﻫﺎي ﺳﻴﺴﺘﻢ ﺑﻴ ، ﻟﺜﻪ ﻫﺎي ﻤﺎﺭي ، ﺷﺒﮑﻪ ﻋﺼﺒﻲ PNN
Studies on handwriting recognition systems have gain a great attention since it has been consider... more Studies on handwriting recognition systems have gain a great attention since it has been considered as an important technology in computer science, especially that handwriting documents have continued to be the most used mean of communication and restoring information in human life. In this paper, a method for detecting the prescribed medications in physicians' handwritten prescriptions is presented. The K-nearest neighbor classifier is used to classify the medications in this study. Furthermore, the Gabor filter is used for feature extraction. To gain a better results, a preprocessing step is considered to improve the quality of extracted features. The simulation results show about 80 percent correct recognition rate on the test samples.
This study introduce a new method for Persian handwritten digits recognition using derived charac... more This study introduce a new method for Persian handwritten digits recognition using derived characteristics of image gradient and image binarization technique. In this technique images are normalized to the standard size and then image gradient is calculated. Gradient angle is calculated for each pixel of the image and is converted to four angles. From the obtained gradient image, four separate gradient images would be constructed each includes gradients of one of the standard angle. These images are used to extract final gradient features. Having images binarized we obtain more information from the images. Neural networks is used for data categorizing. This method has been tested with 20000 data.
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Papers by Noushin Najafiragheb