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Visual Evaluation of JPEG 2000 Color Image Compression Performance (N1583) Testing Group Troy Chinen, Fujifilm Software California Alan Chien, Eastman.

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Presentation on theme: "Visual Evaluation of JPEG 2000 Color Image Compression Performance (N1583) Testing Group Troy Chinen, Fujifilm Software California Alan Chien, Eastman."— Presentation transcript:

1 Visual Evaluation of JPEG 2000 Color Image Compression Performance (N1583) Testing Group Troy Chinen, Fujifilm Software California Alan Chien, Eastman Kodak

2 December 16, 2013 Tokyo 2 Testing Goals Quantitative –For a given set of JPEG 2000 bitrates, compute the corresponding quality-equivalent JPEG bitrates for color images. Qualitative –Characterize JPEG 2000 color compression artifacts.

3 December 16, 2013 Tokyo 3 Testing method Insert JPEG 2000 images between JPEG images of bounding quality. Record mean number of bytes for each insertion; fit to Gaussian distribution C (0.25bpp) B (0.5bpp) A (0.75bpp) D (1.0bpp) 0.3bpp Ordered JPEG images Unordered JPEG 2000 images VL

4 December 16, 2013 Tokyo 4 Testing Method (ctd) 6 scenes: bike, bottles, bride, harbor, woman, wool 10 Reference JPEG images per scene –default mode cjpeg, optimized Huffman tables –0.3 ~ 1.0 (0.1 increments), 1.2, 1.4bpp 4 JPEG 2000 images per scene –Default mode, VM5.2 –Fweights table T15PB –0.25, 0.50, 0.75, 1.0 bpp

5 December 16, 2013 Tokyo 5 Testing Method (ctd) Hardcopy: 300 dpi, 24 bit color Blind testing 6 Observers VL (visually lossless) rankings were not included in the summarizing statistics

6 December 16, 2013 Tokyo 6 Results: aggregate 36% 53% 18% 11% Error bars = 2 sigma

7 December 16, 2013 Tokyo 7 Results: bike

8 December 16, 2013 Tokyo 8 Results: bottles

9 December 16, 2013 Tokyo 9 Results: bride

10 December 16, 2013 Tokyo 10 Results: harbor

11 December 16, 2013 Tokyo 11 Results: woman

12 December 16, 2013 Tokyo 12 Results: wool

13 December 16, 2013 Tokyo 13 Qualitative Results No color distortions observed Most JP2 images at 1.0bpp were VL (in print) Trends:

14 December 16, 2013 Tokyo 14 Conclusions JPEG 2000 filesizes are smaller than JPEG by 53% at 0.25bpp 36% at 0.5 bpp 18% at 0.75 bpp 11% at 1.0 bpp Distortion types of JPEG and JPEG 2000 are fundamentally different, nevertheless consistent rankings were observed.


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