دراسة مقارنة بين خوارزميات تقنيتي DCT و DWT مع استخدام ترميز هوفمان pdf
ملخص الدراسة:
Image compression techniques have been widely used to store and transmit data which requires storage space and high transfer speed. The explosive growth of high-quality photos leads to the requirement of efficient technique to store and exchange data over the internet. In this paper, we present a comparative study to compare between the Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT) algorithms in combination with Huffman algorithm; DCT-H and DWT-H. The comparison is based on five factors: Compression Ratio (CR), Mean Square Error (MSE), Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index Measure (SSIM) and compression/decompression time. The experiments are conducted on five BMP gray-scale file images. We found out that DWT-H coding is comparable to DCT-H coding in term of CR and outperforms DCT-H in terms of MSE, PSNR and SSIM. The CR average results of the five test images for DCT-H and DWT-H are 2.36 and 3.17, respectively. Moreover, DCT-H has the average results of MSE = 13.19, PSNR = 37.15 and SSIM = 0.76, while WDT-H has the average results of MSE = 4.54, PSNR = 42.5 and SSIM = 0.85. On the other hand, DCT-H outperforms DWT-H in term of execution time for compression and decompression. DCT-H has an average compression time of 0.358s and an average decompression time of 0.122s, while WDT-H has 2.38s compression time and 2.13s decompression time.
توثيق المرجعي (APA)
خصائص الدراسة
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المؤلف
Maghari, Ashraf Y. A.
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سنة النشر
2019-08
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الناشر:
ScopeMed Publishing
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المصدر:
المستودع الرقمي للجامعة الإسلامية بغزة
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نوع المحتوى:
Journal Article
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اللغة:
English
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محكمة:
نعم
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الدولة:
فلسطين
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النص:
دراسة كاملة
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نوع الملف:
pdf