Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

Using ImageMagick to resize your Images [FSTO]

Avatar for newtron newtron
April 08, 2015
Technology
480
0

Using ImageMagick to resize your Images [FSTO]

Full Stack Toronto,
2015-04-08
https://github.com/nwtn/pres-imagemagick-fsto

Avatar for newtron

newtron

April 08, 2015

More Decks by newtron

See All by newtron
Universal web design [Accessibility Camp Toronto]
Avatar for newtron newtron
0
250
Universal web design [HackerYou a11y club]
Avatar for newtron newtron
0
240
Universal web design [Full Stack Toronto]
Avatar for newtron newtron
0
280
Information architecture as knowledge translation [World IA Day]
Avatar for newtron newtron
0
320
Improving performance with responsive (and responsible!) images [CSSDay.io]
Avatar for newtron newtron
1
410
Universal Web Design: How to create an awesome experience for every user [Open Source Bridge]
Avatar for newtron newtron
0
300
Improving performance with responsive (and responsible!) images [CSSConf]
Avatar for newtron newtron
6
740
Universal Web Design: How to create an awesome experience for every user [OpenWest]
Avatar for newtron newtron
0
320
Improving performance with responsive (and responsible!) images [OpenWest]
Avatar for newtron newtron
2
400

Other Decks in Technology

See All in Technology
フルカイテン株式会社 エンジニア向け採用資料
Avatar for FULL KAITEN fullkaiten
0
12k
AIによるクリエイティブ生成を行う上での試行錯誤
Avatar for PLAID Tech plaidtech
PRO
0
160
空間オーディオで過去の 自分（ゴースト）と競うランニング 〜HealthKitのルートを足音に変える実装〜
Avatar for Nao-RandD nao_randd
0
230
人間はどの意思決定を手放せるのか
Avatar for Yoshitaka Kawashima kawasima
15
7.3k
すぐできる衛星通信対応 あとは山奥に行くだけ
Avatar for tatetate55 tatetate55
0
130
LTのテーマ どうきめてる？〜5つの型と私のやり方〜
Avatar for Yuuki Yamashita yama3133
1
110
AIエージェントの自己改善をどう設計するか / How to Design Self-Improvement for AI Agents
Avatar for 223 22mi
25
16k
AI に書かせたその API、 “信頼” できますか？
Avatar for 草薙昭彦 nagix
0
130
Railsのように考える: See through the Master
Avatar for Koji SHIMADA snoozer05
PRO
4
1.1k
技術的負債から考える、AI時代のエンジニアリング投資 — ビズリーチの技術的負債と向き合った経験から、変更し続けられるソフトウェアを考える/ technical-debt-con2026
Avatar for Visional Engineering ＆ Design visional_engineering_and_design
4
3.2k
SREへの勘違いに気づいた後の話
Avatar for yuden tomodakengo
0
110
【技術的負債conf】事業成長に伴う技術的負債の説明責任とAIによるモニタリング、認知的負債について
Avatar for Masato Ishigaki / 石垣雅人 i35_267
3
1.7k

Featured

See All Featured
Lightning talk: Run Django tests with GitHub Actions
Avatar for Sarah Abderemane sabderemane
0
260
Practical Tips for Bootstrapping Information Extraction Pipelines
Avatar for Matthew Honnibal honnibal
25
2.1k
StorybookのUI Testing Handbookを読んだ
Avatar for Shingo Yamazaki zakiyama
31
6.9k
Keith and Marios Guide to Fast Websites
Avatar for Keith Pitt keithpitt
413
23k
We Have a Design System, Now What?
Avatar for Morgane Peng morganepeng
55
8.3k
Utilizing Notion as your number one productivity tool
Avatar for Mfonobong Umondia mfonobong
4
590
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
Avatar for Kevin Liebholz kevinliebholz
37
6.6k
Chasing Engaging Ingredients in Design
Avatar for Sebastian Deterding codingconduct
0
310
Building an army of robots
Avatar for Kyle Neath kneath
307
46k
Fireside Chat
Avatar for paigeccino paigeccino
43
4k
Building a Modern Day 
E-commerce SEO Strategy
Avatar for Aleyda Solis aleyda
45
9.2k
Google's AI Overviews - The New Search
Avatar for Barry Adams badams
0
1.6k

Transcript

  1. David Newton, St. Michael’s Hospital 1 1 Using ImageMagick to

    resize your Images Full Stack Toronto, 2015-04-08 Twitter: @newtron Github: @nwtn Email: [email protected] Slides + image credits: https://github.com/nwtn/pres-imagemagick-fsto

  2. 2

  3. 3 Responsive images are a pain in the butt

  4. 4

  5. 5

  6. 6

  7. 7 ImageMagick, y’all

  8. 8

  9. 9 $ brew install imagemagick

  10. 10 Condition (unoptimized input) File size: mean File size: %

    difference Photoshop CC, with optimization 260,305 bytes ImageMagick `-resize` 385,795 bytes 48.21%

  11. 11 How does image resizing work?

  12. 12 685,936 pixels 189,739 pixels

  13. 13 …to 64 pixels? How do we get from 16

    pixels…

  14. 14 != resampling

  15. 15 …to 64 pixels? How do we get from 16

    pixels…

  16. 16 …to 64 pixels? How do we get from 16

    pixels… Background interpolation

  17. 17 …to 64 pixels? How do we get from 16

    pixels… Nearest-neighbour interpolation

  18. 18 Nearest-neighbour interpolation

  19. 19 Bicubic interpolation

  20. 20 Nearest-neighbour vs. bicubic interpolation

  21. 21 7 colours 1,146 colours

  22. 22

  23. More colours = More bytes* 23

  24. 24 https://github.com/nwtn/image-resize-tests/

  25. 25 How do we know which options are best?

  26. Quality objective: measured with DSSIM 26

  27. 27 Control Test Difference

  28. 28

  29. Quality subjective: from me 29

  30. Test a variety of images 30

  31. 31 The best* settings for ImageMagick

  32. 32 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.08+8.3+0.045 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB INPUT_PATH With optimization:

  33. 33 https://github.com/toy/image_optim https://github.com/ajslater/picopt https://imageoptim.com/

  34. 34 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH Without optimization:

  35. 35 mogrify vs. convert

  36. 36

  37. 37 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  38. 38 resampling filter

  39. 39 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  40. 40 Adaptive resize Distort resize Geometry Interpolative resize Liquid rescale

    Resize Sample Scale Thumbnail

  41. 41 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  42. 42

  43. 43

  44. 44 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  45. 45

  46. 46 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  47. 47 Fancy

  48. 48 sharpening

  49. 49 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  50. 50 -unsharp 0.25x0.25+8+0.045 radius sigma gain threshold

  51. 51 -unsharp 0.25x0.25+8+0.045 radius sigma gain threshold

  52. 52 colour reduction

  53. 53 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  54. 54

  55. 55

  56. 56

  57. 57

  58. 58

  59. 59 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -colors NUMBER_OF_COLORS -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH If output file size is larger than input:

  60. 60 7 colours 1,146 colours

  61. 61 7 colours 7 colours

  62. 62 quality and compression

  63. 63 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  64. 64 quality 10 quality 40 quality 70 quality 100

  65. 65 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  66. 66 metadata

  67. 67 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  68. 68 progressive rendering

  69. 69 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  70. 70

  71. 71

  72. Progressive JPEGs Good? Evil? 72

  73. 73 colour space

  74. 74 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH

  75. 75

  76. 76 The best* settings for ImageMagick

  77. 77 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.08+8.3+0.045 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB INPUT_PATH With optimization:

  78. 78 mogrify -path OUTPUT_PATH -filter Triangle - define filter:support=2.0 -thumbnail

    OUTPUT_WIDTH -unsharp 0.25x0.25+8+0.065 -dither None - posterize 136 -quality 82 -define jpeg:fancy- upsampling=off -define png:compression-filter=5 - define png:compression-level=9 -define png:compression-strategy=1 -define png:exclude- chunk=all -interlace none -colorspace sRGB -strip INPUT_PATH Without optimization:

  79. 79 Why even bother?

  80. 80 Condition (unoptimized input) File size: mean File size: %

    difference My settings, optimization 218,274 bytes My settings, no optimization 259,852 bytes 19.05%

  81. 81 Condition (unoptimized input) File size: mean File size: %

    difference My settings, optimization 218,274 bytes My settings, no optimization 259,852 bytes 19.05% Photoshop CC, optimization 260,305 bytes 19.28% Photoshop CC, no optimization 299,710 bytes 35.26%

  82. 82 Condition (unoptimized input) File size: mean File size: %

    difference My settings, optimization 218,274 bytes My settings, no optimization 259,852 bytes 19.05% Photoshop CC, optimization 260,305 bytes 19.28% Photoshop CC, no optimization 299,710 bytes 35.26% basic `-resize` / WordPress* 385,795 bytes 76.75%

  83. 83 Condition (unoptimized input) File size: mean File size: %

    difference My settings, optimization 218,274 bytes My settings, no optimization 259,852 bytes 19.05% Photoshop CC, optimization 260,305 bytes 19.28% Photoshop CC, no optimization 299,710 bytes 35.26% CodeIgniter / ExpressionEngine 340,461 bytes 55.98% TYPO3.CMS* 359,112 bytes 64.52% basic `-resize` / WordPress* 385,795 bytes 76.75% Drupal* 397,588 bytes 82.15% Perch* 416,790 bytes 90.95% Craft CMS* 425,259 bytes 94.83% grunt-responsive-images* 500,273 bytes 129.20%

  84. 84 PHP Imagick

  85. 85

  86. 86

  87. 87 CLI Imagick DSSIM File Size -filter N/A N/A N/A

    -define filter:support setOption() ? ? -thumbnail thumbnailImage() ✗ ✗ -unsharp unsharpMaskImage() ✔ ✔ -dither & -posterize posterizeImage() ✔ ✔ -quality setImageCompressionQuality() ✔ ✗ -define jpeg:fancy-upsampling setOption() ✔ ✔ -define png:compression-filter setOption() ✔ ✔ -define png:compression-level setOption() ✔ ✔ -define png:compression-strategy setOption() ✔ ✔ -define png:exclude-chunk setOption() ✔ ✔ -interlace setInterlaceScheme() ✔ ✔ -colorspace setColorspace() ✔ ✔ -strip stripImage() ✔ ✔

  88. 88

  89. 89 CLI Imagick DSSIM File Size -filter custom ✔ ✗

    -define filter:support setOption() ✔ ✗ -thumbnail custom ✔ ✗ -unsharp unsharpMaskImage() ✔ ✔ -dither & -posterize posterizeImage() ✔ ✔ -quality setImageCompressionQuality() ✔ ✔ -define jpeg:fancy-upsampling setOption() ✔ ✔ -define png:compression-filter setOption() ✔ ✔ -define png:compression-level setOption() ✔ ✔ -define png:compression-strategy setOption() ✔ ✔ -define png:exclude-chunk setOption() ✔ ✔ -interlace setInterlaceScheme() ✔ ✔ -colorspace setColorspace() ✔ ✔ -strip stripImage() ✔ ✔

  90. 90 OK… but it’s still a pain in the butt

  91. 91 https://github.com/nwtn/php-respimg/ Resizing with smart defaults + more coming soon?

  92. 92 $ composer require nwtn/php-respimg

  93. 93

  94. 94 https://www.npmjs.com/package/grunt-respimg Resizing with smart defaults SVG to PNG rasterization

    Optimization

  95. 95 $ npm install grunt-respimg --save-dev

  96. 96

  97. 97

  98. David Newton, St. Michael’s Hospital 98 Using ImageMagick to resize

    your Images Full Stack Toronto, 2015-04-08 Twitter: @newtron Github: @nwtn Email: [email protected] Slides + image credits: https://github.com/nwtn/pres-imagemagick-fsto