Merge branch 'master' of https://github.com/miyako/4d-plugin-phash

README.md

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+4d-plugin-phash
+===============
+
+Image hash based on [pHash](http://www.phash.org/).
+
+### Platform
+
+| carbon | cocoa | win32 | win64 |
+|:------:|:-----:|:---------:|:---------:|
+||<img src="https://cloud.githubusercontent.com/assets/1725068/22371562/1b091f0a-e4db-11e6-8458-8653954a7cce.png" width="24" height="24" />|<img src="https://cloud.githubusercontent.com/assets/1725068/22371562/1b091f0a-e4db-11e6-8458-8653954a7cce.png" width="24" height="24" />|<img src="https://cloud.githubusercontent.com/assets/1725068/22371562/1b091f0a-e4db-11e6-8458-8653954a7cce.png" width="24" height="24" />|
+
+### Version
+
+<img src="https://user-images.githubusercontent.com/1725068/41266195-ddf767b2-6e30-11e8-9d6b-2adf6a9f57a5.png" width="32" height="32" />
+
+![preemption xx](https://user-images.githubusercontent.com/1725068/41327179-4e839948-6efd-11e8-982b-a670d511e04f.png)
+
+#### Supported image formats
+
+* png
+* jpeg
+* tiff
+
+### Syntax
+
+[miyako.github.io](https://miyako.github.io/2019/09/09/4d-plugin-phash.html)
+
+### Examples
+
+```
+$fileA:=Get 4D folder(Current Resources folder)+"2004Cogs.jpg"
+$fileB:=Get 4D folder(Current Resources folder)+"2004Cogs.bmp"
+$fileC:=Get 4D folder(Current Resources folder)+"2004Cogs.png"
+
+$statusA:=PH Compute DCT ($fileA;$hashA)//3726390674172847513
+$statusB:=PH Compute DCT ($fileB;$hashB)//3726390674172847513
+$statusC:=PH Compute DCT ($fileC;$hashC)//3726390674172847513
+
+$fileD:=Get 4D folder(Current Resources folder)+"4D-main.jpg"
+$statusD:=PH Compute DCT ($fileD;$hashD)//2732728107267830226
+$fileE:=Get 4D folder(Current Resources folder)+"4D-main.png"
+$statusE:=PH Compute DCT ($fileE;$hashE)//2732728107267830226
+
+$distance1:=PH Compare DCT ($hashA;$hashB)//0
+$distance2:=PH Compare DCT ($hashA;$hashD)//26
+
+$sigma:=1
+$gamma:=1
+$N:=180
+
+$pcc:=0//peak of cross correlation
+$pcc1:=PH Compare RADISH ($fileA;$fileB;$sigma;$gamma;$N)//0.9999931960446829526
+$pcc2:=PH Compare RADISH ($fileA;$fileC;$sigma;$gamma;$N)//0.9999931960446829526
+$pcc3:=PH Compare RADISH ($fileB;$fileC;$sigma;$gamma;$N)//1
+
+$alpha:=2
+$lvl:=1
+
+$hamming_distance:=0
+$hamming_distance1:=PH Compare MH ($fileA;$fileB;$alpha;$lvl)//0.01215277777777777797
+$hamming_distance2:=PH Compare MH ($fileA;$fileC;$alpha;$lvl)//0.01215277777777777797
+$hamming_distance3:=PH Compare MH ($fileB;$fileC;$alpha;$lvl)//0
+```