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haar_test.go
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package fastimagehash
import (
"testing"
)
func TestHaarX(t *testing.T) {
signal := []byte{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5,
3, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1,
4, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5,
6, 1, 2, 3, 4, 5, 6, 7, 6, 5, 4, 3, 4, 5, 6, 7,
7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0, 7, 0,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
}
lo, hi, err := haarX(signal, 16, 16)
if err != nil {
t.Errorf("no error: %+v", err)
}
btof32 := func(data []byte) []float32 {
f := make([]float32, len(data))
for i := 0; i < len(data); i += 1 {
f[i] = float32(data[i])
}
return f
}
expectLo := make([][]float32, 0, 16)
expectHi := make([][]float32, 0, 16)
for i := 0; i < len(signal); i += 16 {
sig := btof32(signal[i : i+16])
eLo, eHi := nativeHaar1D(sig)
expectLo = append(expectLo, eLo)
expectHi = append(expectHi, eHi)
}
equal := func(a, b float32) bool {
r := a - b
if r == 0 {
return true
}
// margin of error
if 0 < r && 0.000001999 < r {
return false
}
if r < 0 && r < -0.000001999 {
return false
}
return true
}
equalSlice := func(a, b []float32) bool {
if len(a) != len(b) {
return false
}
for i := 0; i < len(a); i += 1 {
if equal(a[i], b[i]) != true {
t.Logf("a %v <> b %v: %3.8f", a[i], b[i], a[i]-b[i])
return false
}
}
return true
}
if equalSlice(expectLo[0], lo[0:8]) != true {
t.Errorf("expect %v <> actual %v", expectLo[0], lo[0:8])
}
if equalSlice(expectHi[0], hi[0:8]) != true {
t.Errorf("expect %v <> actual %v", expectHi[0], hi[0:8])
}
if equalSlice(expectLo[1], lo[8:16]) != true {
t.Errorf("expect %v <> actual %v", expectLo[1], lo[8:16])
}
if equalSlice(expectHi[1], hi[8:16]) != true {
t.Errorf("expect %v <> actual %v", expectHi[1], hi[8:16])
}
if equalSlice(expectLo[2], lo[16:24]) != true {
t.Errorf("expect %v <> actual %v", expectLo[2], lo[16:24])
}
if equalSlice(expectHi[2], hi[16:24]) != true {
t.Errorf("expect %v <> actual %v", expectHi[2], hi[16:24])
}
if equalSlice(expectLo[3], lo[24:32]) != true {
t.Errorf("expect %v <> actual %v", expectLo[3], lo[24:32])
}
if equalSlice(expectHi[3], hi[24:32]) != true {
t.Errorf("expect %v <> actual %v", expectHi[3], hi[24:32])
}
if equalSlice(expectLo[4], lo[32:40]) != true {
t.Errorf("expect %v <> actual %v", expectLo[4], lo[32:40])
}
if equalSlice(expectHi[4], hi[32:40]) != true {
t.Errorf("expect %v <> actual %v", expectHi[4], hi[32:40])
}
if equalSlice(expectLo[5], lo[40:48]) != true {
t.Errorf("expect %v <> actual %v", expectLo[5], lo[40:48])
}
if equalSlice(expectHi[5], hi[40:48]) != true {
t.Errorf("expect %v <> actual %v", expectHi[5], hi[40:48])
}
if equalSlice(expectLo[6], lo[48:56]) != true {
t.Errorf("expect %v <> actual %v", expectLo[6], lo[48:56])
}
if equalSlice(expectHi[6], hi[48:56]) != true {
t.Errorf("expect %v <> actual %v", expectHi[6], hi[48:56])
}
p := 7
for i := 56; i < 128; i += 8 {
if equalSlice(expectLo[p], lo[i:i+8]) != true {
t.Errorf("[%d] expect %v <> actual %v", p, expectLo[p], lo[i:i+8])
}
if equalSlice(expectHi[p], hi[i:i+8]) != true {
t.Errorf("[%d] expect %v <> actual %v", p, expectHi[p], hi[i:i+8])
}
p += 1
}
}
func TestHaarY(t *testing.T) {
signal := []byte{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
2, 2, 2, 2, 0, 1, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
3, 2, 2, 2, 0, 2, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
4, 2, 2, 2, 0, 3, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
5, 3, 3, 1, 0, 4, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
6, 3, 3, 1, 0, 5, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
7, 3, 3, 1, 0, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
8, 3, 3, 1, 0, 7, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
9, 4, 2, 2, 0, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
10, 4, 2, 2, 0, 5, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
11, 4, 2, 2, 0, 4, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
12, 4, 2, 2, 0, 3, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
13, 5, 1, 3, 0, 4, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
14, 5, 1, 3, 0, 5, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
15, 5, 1, 3, 0, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
16, 5, 1, 3, 5, 7, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
}
lo, hi, err := haarY(signal, 16, 16)
if err != nil {
t.Errorf("no error: %+v", err)
}
btof32 := func(data []byte) []float32 {
f := make([]float32, len(data))
for i := 0; i < len(data); i += 1 {
f[i] = float32(data[i])
}
return f
}
equal := func(a, b float32) bool {
r := a - b
if r == 0 {
return true
}
// margin of error
if 0 < r && 0.000001999 < r {
return false
}
if r < 0 && r < -0.000001999 {
return false
}
return true
}
equalSlice := func(a, b []float32) bool {
if len(a) != len(b) {
return false
}
for i := 0; i < len(a); i += 1 {
if equal(a[i], b[i]) != true {
t.Logf("a %v <> b %v: %3.8f", a[i], b[i], a[i]-b[i])
return false
}
}
return true
}
for i := 0; i < 16; i += 1 {
aLo := []float32{
lo[i+0],
lo[i+16],
lo[i+32],
lo[i+48],
lo[i+64],
lo[i+80],
lo[i+96],
lo[i+112],
}
aHi := []float32{
hi[i+0],
hi[i+16],
hi[i+32],
hi[i+48],
hi[i+64],
hi[i+80],
hi[i+96],
hi[i+112],
}
inY := []byte{
signal[i+0],
signal[i+16],
signal[i+32],
signal[i+48],
signal[i+64],
signal[i+80],
signal[i+96],
signal[i+112],
signal[i+128],
signal[i+144],
signal[i+160],
signal[i+176],
signal[i+192],
signal[i+208],
signal[i+224],
signal[i+240],
}
expectLo, expectHi := nativeHaar1D(btof32(inY))
if equalSlice(expectLo, aLo) != true {
t.Errorf("[%d] expect %v <> actual %v", i, expectLo, aLo)
}
if equalSlice(expectHi, aHi) != true {
t.Errorf("[%d] expect %v <> actual %v", i, expectHi, aHi)
}
}
}
func TestHaarXY(t *testing.T) {
signal := []byte{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
2, 2, 2, 2, 0, 1, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
3, 2, 2, 2, 0, 2, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
4, 2, 2, 2, 0, 3, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
5, 3, 3, 1, 0, 4, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
6, 3, 3, 1, 0, 5, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
7, 3, 3, 1, 0, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
8, 3, 3, 1, 0, 7, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
9, 4, 2, 2, 0, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
10, 4, 2, 2, 0, 5, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
11, 4, 2, 2, 0, 4, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
12, 4, 2, 2, 0, 3, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
13, 5, 1, 3, 0, 4, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
14, 5, 1, 3, 0, 5, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
15, 5, 1, 3, 0, 6, 7, 8, 0, 0, 0, 0, 0, 0, 0, 0,
16, 5, 1, 3, 5, 7, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0,
}
lo, hi, err := haar(signal, 16, 16)
if err != nil {
t.Errorf("no error: %+v", err)
}
btof32 := func(data []byte) []float32 {
f := make([]float32, len(data))
for i := 0; i < len(data); i += 1 {
f[i] = float32(data[i])
}
return f
}
equal := func(a, b float32) bool {
r := a - b
if r == 0 {
return true
}
// margin of error
if 0 < r && 0.000001999 < r {
return false
}
if r < 0 && r < -0.000001999 {
return false
}
return true
}
equalSlice := func(a, b []float32) bool {
if len(a) != len(b) {
return false
}
for i := 0; i < len(a); i += 1 {
if equal(a[i], b[i]) != true {
t.Logf("a %v <> b %v: %3.8f", a[i], b[i], a[i]-b[i])
return false
}
}
return true
}
eLoXY, eHiXY := nativeHaar2D([][]float32{
btof32(signal[0:16]),
btof32(signal[16:32]),
btof32(signal[32:48]),
btof32(signal[48:64]),
btof32(signal[64:80]),
btof32(signal[80:96]),
btof32(signal[96:112]),
btof32(signal[112:128]),
btof32(signal[128:144]),
btof32(signal[144:160]),
btof32(signal[160:176]),
btof32(signal[176:192]),
btof32(signal[192:208]),
btof32(signal[208:224]),
btof32(signal[224:240]),
btof32(signal[240:256]),
})
p := 0
for i := 0; i < 64; i += 8 {
aLo := lo[i : i+8]
aHi := hi[i : i+8]
if equalSlice(eLoXY[p], aLo) != true {
t.Logf("[%d] expect %v <> actual %v", p, eLoXY[p], aLo)
}
if equalSlice(eHiXY[p], aHi) != true {
t.Logf("[%d] expect %v <> actual %v", p, eHiXY[p], aHi)
}
p += 1
}
}