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Lucid

Testing results:   Lucid generates noticeably better image quality than other technologies. Here reported are testing results of Lucid, in comparison with international standards JPEG2000 (1999), JPEG XR (2009, or called Microsoft HD Photo), Google WebP (2012) and JPEG (1989), using the famous Kodak testing image Birds (768*512*24). The followings are comparison in numerical metric SSIM (structured similarity) and face-to-face comparison between the images compressed by different technologies. We can see that, Lucid may double the performance improvement by JPEG XR and Google WebP over JPEG. 
 
Verification:   To verify, click here to download Lucid demo version (Windows) and the testing data of Lucid together with JPEG2000, JPEG XR, WebP and JPEG. Click here to see more testing results, including lossless compression and high ratio compression (100:1 or above).


numerical comparison in SSIM

  

(1). Original image :

Original image



(2). JPEG (100 :1 ) :  
 
JPEG (100:1)



(3). Lucid (100 :1 ) :

Lucid (100:1)



(4). JPEG XR (100 :1 ) :

JPEG XR (100:1)



(5). Google WebP (100 :1) : 

 Google WebP (100:1)


(6). JPEG2000 (100 :1 ) : 

JPEG2000 (100:1)


 

Test settings:    The following table lists the test settings used for the above results. For JPEG2000 and JPEG, we used LuraWave SmartCompress. Data given in the table are, quantization parameter for Lucid, file size (KB) for JPEG2000, quality factor for JPEG and Google WebP, quantization factor for JPEG XR.

Test Settings 

 ratio ( :1)

20 32 48 56 64 100 150 200 300
Lucid 0.5 0.75 1 1.25 1.5 2 3 3.75 5.25
JPEG 86 71 43 33 26 11 1
JPEG2000 60.7 36 24 20 18 11.5 7.6 5.84 3.96
JPEG XR 25 37 47 50 54 65 73 80 88
Google WebP 92 86 78 74 63 33 13 5 1(*)

(*) Google WebP reaches 250:1 when quality factor = 1.



Comments on Lucid:
 
1.  "It is very impressive!"
                 --- Dr. Rico Malvar (Chief Scientist, Microsoft)

2.  "It is amazing!"
                 --- Dr. William Pearlman (Professor, Rensselaer Polytechnic Institute)

3.  "I believe it would be very appropriate for you to bring your technology to the Advanced Image Coding (AIC) ad hoc group."
                 
--- Mr. Lou Sharpe (Chair, ISO JPEG Committee)






 


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