Mohammad Khorsheed | King Abdulaziz City for Science and Technology (KACST) (original) (raw)

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Papers by Mohammad Khorsheed

Research paper thumbnail of Enhanced Image Transmission in Remote Sensing Satellites

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Research paper thumbnail of Improving image quality in remote sensing satellites using channel coding

ABSTRACT Among other factors that characterize satellite communication channels is their high bit... more ABSTRACT Among other factors that characterize satellite communication channels is their high bit error rate. We present a system for still image transmission over noisy satellite channels. The system couples image compression together with error control codes to improve the received image quality while maintaining its bandwidth requirements. The proposed system is tested using a high resolution satellite imagery simulated over the Rician fading channel. Evaluation results show improvement in overall system including image quality and bandwidth requirements compared to similar systems with different coding schemes.

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Research paper thumbnail of Enhanced Image Transmission in Remote Sensing Satellites

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Research paper thumbnail of Improving image quality in remote sensing satellites using channel coding

ABSTRACT Among other factors that characterize satellite communication channels is their high bit... more ABSTRACT Among other factors that characterize satellite communication channels is their high bit error rate. We present a system for still image transmission over noisy satellite channels. The system couples image compression together with error control codes to improve the received image quality while maintaining its bandwidth requirements. The proposed system is tested using a high resolution satellite imagery simulated over the Rician fading channel. Evaluation results show improvement in overall system including image quality and bandwidth requirements compared to similar systems with different coding schemes.

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Research paper thumbnail of Method of Encoding and Decoding Data on a Matrix Code Symbol

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Research paper thumbnail of HMM-based recognition engine using a novel approach for statistical feature extraction

The 2014 2nd International Conference on Systems and Informatics, Nov 1, 2014

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Research paper thumbnail of Matrix Code Symbols for Accurate Robot Tracking

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Research paper thumbnail of Efficient image transmission using transform-based compression techniques

Proceedings of the Third Conference on Iasted International Conference Advances in Computer Science and Technology, Apr 2, 2007

ABSTRACT We present a system for still image transmission over noisy satellite channels. The syst... more ABSTRACT We present a system for still image transmission over noisy satellite channels. The system couples image compression together with error control codes to improve the received image quality while maintaining its bandwidth requirements. In this paper we extend our previous work on Discrete Cosine Transform (DCT) based image compression in noisy channels. We evaluate the performance of Discrete Wavelet Transform (DWT) based image compression and compare it to its equivalent DCT-based. We show how DWT-based image compression outperforms DCT-based both in noise-free and noisy channels. We also show how using a class of Forward Error Correction called Parallel Concatenated Gallager Codes (PCGC) can significantly improve the quality of the transmitted image in noisy channels. Despite the bandwidth expansion caused by introducing PCGC, the protected image occupies a smaller bandwidth now by compressing the image before applying PCGC. Evaluation results show improvement in the over-all system including bandwidth requirements compared to similar systems with different coding schemes.

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Research paper thumbnail of Systems and Methods of Communicating in a Networking Environment

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Research paper thumbnail of Method and Apparatus for Automatically Identifying Character Segments for Character Recognition

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Research paper thumbnail of Apparatus and Method for Decoding Matrix Code Symbol

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Research paper thumbnail of Method of Encoding and Decoding Text on a Matrix Code Symbol

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Research paper thumbnail of Method and System for Text Segmentation

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Research paper thumbnail of System and method of information technology application deployment

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Research paper thumbnail of Method and System for Diacritizing Arabic Language Text

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Research paper thumbnail of System and methods for cost-effective bilingual texting

A method for facilitating texting in a non-Latin-based language includes storing mapping between ... more A method for facilitating texting in a non-Latin-based language includes storing mapping between a non-Latin-based language and a Latin-based language in computer storage. The characters in the non-Latin-based language are mapped to a first group of characters in ...

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Research paper thumbnail of Automatic Processing of Handwritten Arabic Forms using Neural Networks

... These letters are grouped in the following two words: ' '. Some Arabic letters may ... more ... These letters are grouped in the following two words: ' '. Some Arabic letters may have a zig-zag-like stroke called Hamza. This additional character can be on Alif ' ' , below Alif ' ' , on W aw ' ',ona Alif-Maqsura ' ' , or isolated on the line ' '. ... [8] F. Said, R. Yacoub, and C. Suen ...

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Research paper thumbnail of Automatic Arabic Text Classification

... The C5.0 algorithm outperformed the SVM algorithm by about 10%; the SVM average accuracy is 6... more ... The C5.0 algorithm outperformed the SVM algorithm by about 10%; the SVM average accuracy is 68.65%, while the average accuracy for the C5.0 is 78.42%. A drawback of the C5.0 algorithm is that it is a black box algorithm that is only commercially available. ...

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Research paper thumbnail of KACST Arabic Text Classification Project Overview and Preliminary Results

Abstract Electronically formatted Arabic free-texts can be found in abundance these days on the W... more Abstract Electronically formatted Arabic free-texts can be found in abundance these days on the World Wide Web, often linked to commercial enterprises and/or government organizations. Vast tracts of knowledge and relations lie hidden within these texts, ...

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Research paper thumbnail of Method and System for Preprocessing an Image for Optical Character Recognition

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Research paper thumbnail of Enhanced Image Transmission in Remote Sensing Satellites

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Research paper thumbnail of Improving image quality in remote sensing satellites using channel coding

ABSTRACT Among other factors that characterize satellite communication channels is their high bit... more ABSTRACT Among other factors that characterize satellite communication channels is their high bit error rate. We present a system for still image transmission over noisy satellite channels. The system couples image compression together with error control codes to improve the received image quality while maintaining its bandwidth requirements. The proposed system is tested using a high resolution satellite imagery simulated over the Rician fading channel. Evaluation results show improvement in overall system including image quality and bandwidth requirements compared to similar systems with different coding schemes.

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Research paper thumbnail of Enhanced Image Transmission in Remote Sensing Satellites

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Improving image quality in remote sensing satellites using channel coding

ABSTRACT Among other factors that characterize satellite communication channels is their high bit... more ABSTRACT Among other factors that characterize satellite communication channels is their high bit error rate. We present a system for still image transmission over noisy satellite channels. The system couples image compression together with error control codes to improve the received image quality while maintaining its bandwidth requirements. The proposed system is tested using a high resolution satellite imagery simulated over the Rician fading channel. Evaluation results show improvement in overall system including image quality and bandwidth requirements compared to similar systems with different coding schemes.

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Research paper thumbnail of Method of Encoding and Decoding Data on a Matrix Code Symbol

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Research paper thumbnail of HMM-based recognition engine using a novel approach for statistical feature extraction

The 2014 2nd International Conference on Systems and Informatics, Nov 1, 2014

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Research paper thumbnail of Matrix Code Symbols for Accurate Robot Tracking

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Research paper thumbnail of Efficient image transmission using transform-based compression techniques

Proceedings of the Third Conference on Iasted International Conference Advances in Computer Science and Technology, Apr 2, 2007

ABSTRACT We present a system for still image transmission over noisy satellite channels. The syst... more ABSTRACT We present a system for still image transmission over noisy satellite channels. The system couples image compression together with error control codes to improve the received image quality while maintaining its bandwidth requirements. In this paper we extend our previous work on Discrete Cosine Transform (DCT) based image compression in noisy channels. We evaluate the performance of Discrete Wavelet Transform (DWT) based image compression and compare it to its equivalent DCT-based. We show how DWT-based image compression outperforms DCT-based both in noise-free and noisy channels. We also show how using a class of Forward Error Correction called Parallel Concatenated Gallager Codes (PCGC) can significantly improve the quality of the transmitted image in noisy channels. Despite the bandwidth expansion caused by introducing PCGC, the protected image occupies a smaller bandwidth now by compressing the image before applying PCGC. Evaluation results show improvement in the over-all system including bandwidth requirements compared to similar systems with different coding schemes.

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Research paper thumbnail of Systems and Methods of Communicating in a Networking Environment

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Research paper thumbnail of Method and Apparatus for Automatically Identifying Character Segments for Character Recognition

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Research paper thumbnail of Apparatus and Method for Decoding Matrix Code Symbol

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Research paper thumbnail of Method of Encoding and Decoding Text on a Matrix Code Symbol

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Research paper thumbnail of Method and System for Text Segmentation

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Research paper thumbnail of System and method of information technology application deployment

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Research paper thumbnail of Method and System for Diacritizing Arabic Language Text

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Research paper thumbnail of System and methods for cost-effective bilingual texting

A method for facilitating texting in a non-Latin-based language includes storing mapping between ... more A method for facilitating texting in a non-Latin-based language includes storing mapping between a non-Latin-based language and a Latin-based language in computer storage. The characters in the non-Latin-based language are mapped to a first group of characters in ...

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Research paper thumbnail of Automatic Processing of Handwritten Arabic Forms using Neural Networks

... These letters are grouped in the following two words: ' '. Some Arabic letters may ... more ... These letters are grouped in the following two words: ' '. Some Arabic letters may have a zig-zag-like stroke called Hamza. This additional character can be on Alif ' ' , below Alif ' ' , on W aw ' ',ona Alif-Maqsura ' ' , or isolated on the line ' '. ... [8] F. Said, R. Yacoub, and C. Suen ...

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Research paper thumbnail of Automatic Arabic Text Classification

... The C5.0 algorithm outperformed the SVM algorithm by about 10%; the SVM average accuracy is 6... more ... The C5.0 algorithm outperformed the SVM algorithm by about 10%; the SVM average accuracy is 68.65%, while the average accuracy for the C5.0 is 78.42%. A drawback of the C5.0 algorithm is that it is a black box algorithm that is only commercially available. ...

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Research paper thumbnail of KACST Arabic Text Classification Project Overview and Preliminary Results

Abstract Electronically formatted Arabic free-texts can be found in abundance these days on the W... more Abstract Electronically formatted Arabic free-texts can be found in abundance these days on the World Wide Web, often linked to commercial enterprises and/or government organizations. Vast tracts of knowledge and relations lie hidden within these texts, ...

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Research paper thumbnail of Method and System for Preprocessing an Image for Optical Character Recognition

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