lordwelch/goimagehash
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11 Commits

Author SHA1 Message Date
Dong-hee Na
47321c08d3
imagehash: Create a new API Bits() (#25) 2019-03-17 15:42:07 +09:00
Dong-hee Na
84eb1859d0
imagehash: Add new serialization API dump/load. (#24) 
Create a new APIs for serializing purpose which can use
standard io.Reader/io.Writer APIs.

ToString() API will be remain for debugging purpose and
ExtImageHashFromString, ImageHashFromString will be removed after next
version.

- New APIs are added: LoadExtImageHash, LoadImageHash, xxxHash.Dump
- These APIs are deprecated: ExtImageHashFromString, ImageHashFromString
 2019-03-17 11:34:56 +09:00
Dong-hee Na
58a4aa88ab
hashcompute: Fix bit set index (#22) 2019-03-16 17:22:57 +09:00
Alex
c41a59a872 add PerceptionHashExtend function (#18) 
goimagehash: Implement PerceptionHashExtend
 2019-02-08 18:02:25 +09:00
Dominik Honnef
ad2b6ded3b Use bits.OnesCount64 when available 
Benchmark on i7-2600k, which has the POPCNT instruction:

name                 old time/op  new time/op  delta
DistanceIdentical-8  5.08ns ± 0%  1.01ns ± 1%  -80.07%  (p=0.008 n=5+5)
DistanceDifferent-8  81.5ns ± 2%   1.0ns ± 0%  -98.76%  (p=0.016 n=5+4)

Benchmark on Cavium Octeon, a MIPS64 platform with no dedicated
instruction:

name                 old time/op  new time/op  delta
DistanceIdentical-2   120ns ± 6%   144ns ± 5%  +19.93%  (p=0.008 n=5+5)
DistanceDifferent-2   656ns ± 4%   144ns ± 4%  -78.09%  (p=0.008 n=5+5)
 2018-05-02 23:52:38 +09:00
Gustavo Brunoro
71a79d6ce7 added serialization unit tests 2017-11-17 09:56:54 +09:00
Gustavo Brunoro
40b64eda79 adds hex serialization methods to ImageHash 
The ToString and FromString methods create a string representation
of an ImageHash, following the format:
`<first letter of type>:<hex representation of hash`
 2017-11-17 09:56:54 +09:00
Dong-hee Na
22bcbf7685 goimagehash: Make go report card happy. 2017-08-04 01:05:13 +09:00
Dong-hee Na
b969cb59dc goimagehash: Fix typo. 2017-08-03 22:40:42 +09:00
Dong-hee Na
2b9c664be8 Update docs. 2017-07-31 23:29:35 +09:00
Dong-hee Na
7aba8954cd [goimagehash] First implement. 2017-07-31 22:47:14 +09:00