• OPTIMISING INDUSTRIAL IMAGING
    Lossless compression | Probative archival | Traceability

(Resource) Waaves sample files and comparison with JPEG

WaavesResources > Waaves sample files and comparison with JPEG

On this page, you will find:
  • A comparison between Waaves and JPEG on a 4000 pixels-wide photograph. Image quality and compression performance are compared separately.
  • A download link for a file containing other images in JPEG and Waaves format, compressed at different quality / size settings.
  • A download link for the Waaves viewer allowing you to display both types of images.
Note: all the photographs on this page are screenshots displayed in JPEG. This dilutes some of the differences seen on screen. We encourage you to download the images and viewer to evaluate the performance differences for yourself in the best possible conditions.

comparatif performance qualite entre waaves et jpeg - Notre Dame de Paris
The initial image is this view of Notre-Dame de Paris photographed with a Sony A7r camera and Zeiss OTUS 85/1.4 lens at f/5.6, in RAW format, and offering a very high image quality (61Mo in TIFF/16 format downsized to 4000 pixels wide).

The graph below displays the performance gap between JPEG and Waaves using SSIM and MS-SSIM, at growing compression levels. Note that, in order to measure the quality of Waaves, a slightly lossy output format was used, making the Waaves results lower than in real-life.

comparatif performance qualite entre weaaves et jpeg - Notre Dame de Paris
 
 

Comparing file size at identical image quality

For this first comparison, a weak compression applied in both formats to maintain high quality (and very little visual degradation) and the weights of the matches images are the following:
  • JPEG:    7 445 Kb
  • Waaves: 2 127 Kb 
The JPEG image weighs 350% more than the Waaves image. Both have equivalent quality. Here is a visual comparison at 3 points in the image (click any image to enlarge it to 100%)

notre dame de paris comparatif waaves jpeg
(top middle)

notre dame de paris comparatif waaves jpeg
(bottom left)

notre dame de paris comparatif waaves jpeg
(bottom right)

 

Comparing image quality at identical file size

For this second comparison, a stronger compression has been applied and both file sizes are matched:
  • JPEG:    518 Kb  (compression: 60x)
  • Waaves: 487 Kb (compression: 64x)
In spite of slightly lower weight, the Waaves image has much higher quality :

notre dame de paris comparatif waaves jpeg
(top middle)

notre dame de paris comparatif waaves jpeg
(bottom left)

notre dame de paris comparatif waaves jpeg
(bottom right)

Conclusions:
  • Waaves focuses on the preservation of fine detail much better than JPEG. See the ALGECO lettering in the last image, or the green statues in the first.
  • JPEG quickly creates posterization effects in the sky or in gradual color / tone changes. This degradation is totally absent from Waaves. See the sky from the first and third images.
  • Halos around high contrast details are much more pronounced with JPEG. Check the aerials in all 3 images.
Waaves wasn't designed with aesthetics in mind. It applies greater compression to areas with low information content and preserves detail much better. Waaves allows better preservation of important information for diagnostics applications, traceability, signal analysis, archiving ...
 
 

See for yourself

Downloand an archive of varied test images test compressed optimally in JPEG and Waaves formats to compare the fidelity of each directly on your own screen. Here are a few samples of the images in the archive.

notre dame de paris comparatif waaves jpeg

 

notre dame de paris comparatif waaves jpeg
Color artefacts in JPEG, finer detail visible in Waaves in spite of 3x higher compression
 

notre dame de paris comparatif waaves jpeg

 

Download the images and Waaves viewer