Funny American Football Pictures U Der 500 Kb

Contents of this Gallery

This gallery page is best viewed with a browser that supports WebP, such as Google Chrome, Opera and others.

If you don't take access to Google Chrome, you may download the images on your local drive to utilise with other products that support WebP.

Sample Image Files in JPEG and WebP and the PNG Source

The table below shows scaled JPEG (on the left) and WebP images (on the right) side-past-side for comparison. Since browsers exist that support WebP natively, we no longer identify WebP images in a PNG container as we did at launch. Image file sizes are verbal. Clicking on the JPEG and WebP thumbnails will open the large images in a new tab

File sizes below the thumbnails correspond to the files sizes of the images viewed when clicking the thumbnails. The WebP images are more than 30% smaller than the JPEG ones.

JPEG	WEBP
"Nærøyfjorden, Norway - from Breiskrednosi. UNESCO World Heritage" 1
JPEG file size: 43.84 KB	WebP file size: 29.61 KB
"Kayaker at Ekstremsportveko 2010, Voss". 2
JPEG file size: 86.25 KB	WebP file size: 59.18 KB
Frame 10 of the "Parkrun" sequence 3
JPEG file size: 297.05 KB	WebP file size: 198.38 KB
Image: "A Wild Cherry (Prunus avium) in bloom" 4
JPEG file size: 251.03 KB	WebP file size: 172.82 KB
Image: Fire breathing "Jaipur Maharaja Brass Band" Chassepierre Kingdom of belgium 5
JPEG file size: 120.78 KB	WebP file size: 80.76 KB

Paradigm Credits

The images on this page come from a number of dissimilar sources. We have selected some delightful and rich pictures to showcase qualities of WebP. Famous classic images such every bit Lena, the Baboon, etc., ofttimes used when doing compression comparisons, are unfortunately not free of copyright.

Credits for the images above are listed hither in club.

Reproducing the Images

For the sake of reproducibility and to demonstrate the utilize of some WebP pinch parameters, we describe here the exact steps involved when generating the images in this gallery.

Tools

To convert and rescale the source pictures, we used a recent version of ImageMagick's tool named convert, bachelor at https://www.imagemagick.org. The version information reads:

          Version: ImageMagick 6.5.7-viii 2010-12-02 Q16 https://world wide web.imagemagick.org                  

For JPEG compression, we used the version 8b of IJG'due south reference encoder, available at https://www.ijg.org/files/jpegsrc.v8b.tar.gz.

The version information reads:

          Independent JPEG Group's CJPEG, version 8b  16-May-2010 Copyright (C) 2010, Thomas G. Lane, Guido Vollbeding                  

Generating the Source PNG Pictures

First, the JPEG sources are converted losslessly to PNG format only using:

          catechumen in.jpg out.png                  

Then, the large source images are rescaled to a smaller width of 1024 pixels using the following command:

          convert in.png -depth 16 -gamma 0.454545 -filter lanczos -resize 1024 -gamma two.2 -depth 8 out.png                  

to produce the final set of source PNG images.

Compressing to JPEG Format

JPEG's encoder (cjpeg) takes input images in PPM format. Nosotros use convert to generate them. The consummate conversion sequence is then:

          convert in.png tmp.ppm cjpeg -optimize -quality eighty -outfile out.jpg tmp.ppm                  

which produces optimized JPEG files with a quality cistron of 80.

Compressing to WebP Format

We targeted a thirty% file size reduction compared to the optimized JPEG files. Thus, we explicitely specified the target sizes for each pictures. Additionally, nosotros gear up ad-hoc values for the filtering strength for each pictures, thanks to the -f option of the cwebp tool. The aamplitude of the spatial racket shaping is as well reinforced for some pictures by use of the -sns option. The verbal control lines used read:

          cwebp -m 6 -f 50 -size 31500 ane.png -o 1.webp cwebp -m 6 -f twenty -sns 100 -size 62000 2.png -o 2.webp cwebp -m 6 -sns ninety -size 213000 3.png -o 3.webp cwebp -m 6 -f 40 -size 181000 four.png -o 4.webp cwebp -k six -f 40 -size 89000 five.png -o 5.webp                  

Overall, the resulting WebP files provided a global saving of 32% compared to the JPEG file sizes.

Note that the WebP thumbnails used on this page are likewise smaller past 26% compared to their JPEG equivalent.

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Source: https://developers.google.com/speed/webp/gallery1

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