Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Using ImageMagick to resize your Images [GTA PHP]

C3e8ba214714b1402f3073334249fcdc?s=47 newtron
April 07, 2015
Technology
0
180

Using ImageMagick to resize your Images [GTA PHP]

GTA PHP User Group,
2015-04-07
https://github.com/nwtn/pres-imagemagick-gtaphp

C3e8ba214714b1402f3073334249fcdc?s=128

newtron

April 07, 2015
Tweet

More Decks by newtron

See All by newtron
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
0
63
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
0
70
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
0
57
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
0
120
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
1
140
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
0
100
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
6
370
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
0
130
C3e8ba214714b1402f3073334249fcdc?s=48 newtron
2
210

Other Decks in Technology

See All in Technology
1b9e2b135e11b80d5923db6bb250ffe7?s=48 daisukehirama41
1
340
Db56c5975c67fcabeb1a395b835fa250?s=48 brtriver
1
510
0d9e60b12d0a40841b1a746b112ad36b?s=48 aamine
4
900
7a54d6143169419fc6d4d9a0ff3056ea?s=48 maekawa123
0
630
Bf7fe621f4fe1615c228ef8a79b87282?s=48 shirayanagiryuji
1
190
Cc49268bebed3e30cb943a9de7b6eb3a?s=48 lain21
14
5.3k
94870c02836167043f37f05ae1032690?s=48 tatsy
2
430
94870c02836167043f37f05ae1032690?s=48 tatsy
0
130
65d8522e6ea1d11c8f6343027b2e1688?s=48 yashi8484
0
130
563d2e1e4cabf5ca21404f7104c90e91?s=48 prog893
0
140
585cdfa5a081d53de7529e9b58926af2?s=48 kota2and3kan
2
350
3373c144fef1d3518b9b3f24a6b46ad0?s=48 lmi
5
3.7k

Featured

See All Featured
Ba530e786553390f3fb271848485681c?s=48 3n
163
22k
3d4519fd34b76fb265fc0237f3792bd4?s=48 danielanewman
201
20k
8081b26e05bb4354f7d65ffc34cbbd67?s=48 chriscoyier
498
130k
C9b18d9dff88a9dd2393364c2b3b21bd?s=48 colly
66
3k
Fde6c3a50ca518a909ef35c22c0ee0e4?s=48 destraynor
221
47k
5f2da528927a2ec9ba4fec2069cbc958?s=48 kneath
220
15k
1f74b13f1e5c6c69cb5d7fbaabb1e2cb?s=48 sferik
613
55k
7fa6101cd43067653cf4ac6c7ca54305?s=48 akmur
252
19k
D8fc2580cfaca035f666d9e4ee79a7f7?s=48 mongodb
23
3.9k
3d6ace9554821d552146413bcdf874f6?s=48 trishagee
24
3k
C620790ae5bf5b50c245b2e0ef95f338?s=48 deanohume
294
28k
1177e050db6bafe62885362edf6e3537?s=48 lauravandoore
11
1.7k

Transcript

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

    resize your Images GTA PHP User Group, 2015-04-07 Twitter: @newtron Github: @nwtn Email: david@davidnewton.ca Slides + image credits: https://github.com/nwtn/pres-imagemagick-gtaphp

  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 $ brew install php56-imagick

  11. 11 $ apt-get install php-imagick

  12. 12 Condition (unoptimized input) File size: mean File size: %

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

  13. 13 How does image resizing work?

  14. 14 685,936 pixels 189,739 pixels

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

    pixels…

  16. 16 != resampling

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

    pixels…

  18. 18 …to 64 pixels? How do we get from 16

    pixels… Background interpolation

  19. 19 …to 64 pixels? How do we get from 16

    pixels… Nearest-neighbour interpolation

  20. 20 Nearest-neighbour interpolation

  21. 21 Bicubic interpolation

  22. 22 Nearest-neighbour vs. bicubic interpolation

  23. 23 7 colours 1,146 colours

  24. 24

  25. More colours = More bytes* 25

  26. 26 https://github.com/nwtn/image-resize-tests/

  27. 27 How do we know which options are best?

  28. Quality objective: measured with DSSIM 28

  29. 29 Control Test Difference

  30. 30

  31. Quality subjective: from me 31

  32. Test a variety of images 32

  33. 33 The best* settings for ImageMagick

  34. 34 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:

  35. 35 https://github.com/toy/image_optim https://github.com/ajslater/picopt https://imageoptim.com/

  36. 36 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:

  37. 37 mogrify vs. convert

  38. 38

  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 resampling filter

  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 Adaptive resize Distort resize Geometry Interpolative resize Liquid rescale

    Resize Sample Scale Thumbnail

  43. 43 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

  44. 44

  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

  48. 48 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

  49. 49 Fancy

  50. 50 sharpening

  51. 51 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

  52. 52 -unsharp 0.25x0.25+8+0.045 radius sigma gain threshold

  53. 53 -unsharp 0.25x0.25+8+0.045 radius sigma gain threshold

  54. 54 colour reduction

  55. 55 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

  56. 56

  57. 57

  58. 58

  59. 59

  60. 60

  61. 61 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:

  62. 62 7 colours 1,146 colours

  63. 63 7 colours 7 colours

  64. 64 quality and compression

  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 quality 10 quality 40 quality 70 quality 100

  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 metadata

  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 progressive rendering

  71. 71 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

  72. 72

  73. 73

  74. Progressive JPEGs Good? Evil? 74

  75. 75 colour space

  76. 76 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

  77. 77

  78. 78 The best* settings for ImageMagick

  79. 79 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:

  80. 80 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:

  81. 81 Why even bother?

  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%

  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%

  84. 84 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%

  85. 85 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%

  86. 86 PHP Imagick

  87. 87

  88. 88

  89. 89 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() ✔ ✔

  90. 90

  91. 91 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() ✔ ✔

  92. 92 OK… but it’s still a pain in the butt

  93. 93 https://github.com/nwtn/php-respimg/ Resizing with smart defaults + more coming soon?

  94. 94

  95. 95 https://www.npmjs.com/package/grunt-respimg Resizing with smart defaults SVG to PNG rasterization

    Optimization

  96. 96 $ npm install grunt-respimg --save-dev

  97. 97

  98. 98

  99. David Newton, St. Michael’s Hospital 99 Using ImageMagick to resize

    your Images GTA PHP User Group, 2015-04-07 Twitter: @newtron Github: @nwtn Email: david@davidnewton.ca Slides + image credits: https://github.com/nwtn/pres-imagemagick-gtaphp