Browsing by Author "Yousif, G. A"

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    The best printing methods to print satellite images
    (ELSEVIER SCIENCE BV, 2011-12) Mohamed, R. Sh; Yousif, G. A
    In this paper different printing systems were used to print an image of SPOT-4 satellite, caver part of Sharm Elshekh area, Sinai, Egypt, on the same type of paper as much as possible, especially in the photography. This step is followed by measuring the experimental data, and analyzed colors to determine the best printing systems for satellite image printing data. The laser system is the more printing system where produce a wider range of color and highest densities of ink and access much color detail. Followed by the offset system which it recorded the best dot gain. Moreover, the study shows that it can use the advantages of each method according to the satellite image color and quantity to be produced. (C) 2011 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B.V. All rights reserved.
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    Input resolution and its effect of the printed image quality on digital toner printing systems (case study - Sinai, Egypt)
    (ELSEVIER SCIENCE BV, 2010-06) Yousif, G. A; Mohamed, R. Sh.
    The resolution is considered as one of the most important factors which controls the quality of the printed image, whether input resolution (digital camera-scanner) or output resolution (printer-computer to film, plate or paper). The research discusses the accuracy of the input resolution of image processing equipment for digital files through using two different sets of resolution, one low (72 dpi) and another high (300 dpi) and to print the files by using a digital toner printer. Which produce with a high output resolution up 2400 u 2400 dpi and use the same type of paper for printing these files. Then quality measurements (characteristic curve-dot gain-density) are performed to determine the accuracy effect of input resolution on the quality of the printed images. In this research the researchers used scientific and practical analysis methods to analysis this problem and to determine the accuracy effect of input resolution on the quality of printed images. It has been concluded that the differences of the input resolution do not obviously affect of quality measurements that the results are largely close, despite the quality difference of the two cases (low resolution-high resolution) are easily noticed to the naked eye while zooming images at appropriate level. (C) 2010 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B.V. All rights reserved.