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Dong-hee Na 14aa1e136f
dct: Improve DCT1D to O(nlogn) algorithm (#29) 
* hashcompute_test: Add benchmark

* dct: Improve DCT1D to O(nlogn) algorithm

AS-IS:
BenchmarkPerceptionHash-8  500  2893930 ns/op  456698 B/op  4455 allocs/op

TO-BE:
BenchmarkPerceptionHash-8  2000  890306 ns/op  456382 B/op  4455 allocs/op

reference: DCT type II, unscaled. Algorithm by Byeong Gi Lee, 1984.
2019-03-19 13:52:44 +09:00
..
examples.go dct: Improve DCT1D to O(nlogn) algorithm (#29) 2019-03-19 13:52:44 +09:00
load_and_dump.go dct: Improve DCT1D to O(nlogn) algorithm (#29) 2019-03-19 13:52:44 +09:00
sample1.jpg [goimagehash] First implement. 2017-07-31 22:47:14 +09:00
sample2.jpg [goimagehash] First implement. 2017-07-31 22:47:14 +09:00
sample3.jpg [goimagehash] First implement. 2017-07-31 22:47:14 +09:00
sample4.jpg [goimagehash] First implement. 2017-07-31 22:47:14 +09:00