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mdk.fr/content/pages/image_resolution.md
Julien Palard fd5f51ec4a Initial commit
2017-04-04 23:11:23 +02:00

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status: hidden Title: image-quality robots: noindex

Possible steps of compression

Original photo: 22MB

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Pre-processed image from melty media server: 16MB

mogrify -resize '25000000@>' "$file" # Limit the size to ~ 5000 * 5000 px
jpegoptim -p --strip-all -m100 "$file"

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Base image with a 75% quality, 3.5MB

cp Photo3.jpg Photo3-75pct.jpg
jpegoptim -p --strip-all -m75 Photo3-75pct.jpg
Photo3-75pct.jpg 5184x3310 24bit N Exiff IPTC ICC XMP Adobe  [OK] 22460774 --> 3618936 bytes (83.89%), optimized.

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Base image, resized to 1400px 100%: 2.3MB

gm convert -resize 1400x892 -quality 100 Photo3.jpg Photo3-1400px.jpg

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Base image, resized to 700px 100%: 677KB

gm convert -resize 700x446 -quality 100 Photo3.jpg Photo3-700px.jpg

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Base image, resized to 1400px 75%: 356K

gm convert -resize 1400x892 -quality 75 Photo3.jpg Photo3-1400px-75pct.jpg

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Base image, resized to 700 75%: 152K

gm convert -resize 700x446 -quality 75 Photo3.jpg Photo3-700px-75pct.jpg

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melty mediaserver image 75%, 700px, 82KB

wget http://media.melty.fr/pmedia-3287063-ajust_700-f1469549124/jacky-mornai-et-loup-pendant-amazing-summer.jpg

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