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Image compression
TODO:// Test imageAlpha
2017-01-28
These tests aim to compare the perceived quality and the image size by using different software compression applications.
I have tested the following
- JPEGmini v1.9.9 (build 119)
- ImageOptim v1.6.5
Summary comparison table using an original iPhone 7+ photo (4032 x 3024)
| File | Size |
|---|---|
| Orignal Image 4032 x 3024 | 2 097 KB |
| JPEGmini | 1 365 KB |
| ImageOtim - insane / lossy | |
| ImageOptim 100% Quality | 1 953 KB |
| ImageOptim 70% Quality | 604 KB |
| ImageOptim 40% Quality | 324 KB |
| ImageOtim - fast / lossy (*) | |
| ImageOptim 100% Quality | 1 953 KB |
| ImageOptim 70% Quality | 604 KB |
| ImageOptim 40% Quality | 324 KB |
(*) The speed setting isn't working given that we are getting the same file sizes
Summary comparison table using an iPhone 7+ photo scaled to the iPad Pro 12.9" screen pixels (2732 x 2049)
| File | Size |
|---|---|
| Orignal Image 2732 x 2049 | 1 058 KB |
| JPEGmini | 639 KB |
| ImageOtim - insane / lossy | |
| ImageOptim 100% Quality | 932 KB |
| ImageOptim 70% Quality | 318 KB |
| ImageOptim 40% Quality | 172 KB |
Summary comparison table using an iPhone 7+ photo scaled to the screen pixels (1440 x 1080)
| File | Size |
|---|---|
| Orignal Image 1440 x 1080 | 319 KB |
| JPEGmini | 181 KB |
| ImageOtim - insane / lossy | |
| ImageOptim 100% Quality | 297 KB |
| ImageOptim 70% Quality | 100 KB |
| ImageOptim 40% Quality | 46 KB |
Required space to store 1000 photos
| File | 1 000 photos | 10 000 photos | 100 000 photos |
|---|---|---|---|
| Orignal Image 4032 x 3024 | 2.1 GB | 20.9 GB | 209 GB |
| JPEGmini | 1.4 GB | 13.7 GB | 137 GB |
| ImageOptim 100% Quality | 1.9 GB | 19.5 GB | 195 GB |
| ImageOptim 70% Quality | 604 MB | 6.04 MB | 60 GB |
| ImageOptim 40% Quality | 324 MB | 3.24 MB | 32 GB |
| Orignal Image 2732 x 2049 | 1.0 GB | 10.6 GB | 100 GB |
| JPEGmini | 639 MB | 6.39 GB | 63 GB |
| ImageOptim 100% Quality | 932 MB | 9.32 GB | 93 GB |
| ImageOptim 70% Quality | 318 MB | 3.18 GB | 31 GB |
| ImageOptim 40% Quality | 172 MB | 1.72 GB | 17 GB |
| Orignal Image 1440 x 1080 | 319 MB | 3.19 GB | 32 GB |
| JPEGmini | 181 MB | 1.81 GB | 18 GB |
| ImageOptim 100% Quality | 297 MB | 2.97 GB | 29 GB |
| ImageOptim 70% Quality | 100 MB | 1.00 GB | 10 GB |
| ImageOptim 40% Quality | 46 MB | 460 MB | 4.6 GB |
Side by side comparison
Individual Photos, original size
Individual Photos, iPad Pro 12.9" size
Individual Photos, iPhone7 Plus Sizes
