GOMODULES
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images4
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Added new func: CustomSimilar (3)

master
Vitali Fedulov 2024-01-30 01:18:45 +01:00
parent f7f7753d86
commit 9014e3e259
2 changed files with 12 additions and 12 deletions
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8
custom.go
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@ -19,7 +19,7 @@ type CustomCoefficients struct {
// if necessary. All coefficients set to 0 correspond to identical images,
// for example an image file copy. All coefficients equal to 1 make func
// CustomSimilar equivalent to func Similar.
func CustomSimilar(iconA, iconB IconT, coeff *CustomCoefficients) bool {
func CustomSimilar(iconA, iconB IconT, coeff CustomCoefficients) bool {
if !customPropSimilar(iconA, iconB, coeff) {
return false
@ -30,11 +30,11 @@ func CustomSimilar(iconA, iconB IconT, coeff *CustomCoefficients) bool {
return true
}
func customPropSimilar(iconA, iconB IconT, coeff *CustomCoefficients) bool {
func customPropSimilar(iconA, iconB IconT, coeff CustomCoefficients) bool {
return PropMetric(iconA, iconB) <= thProp*coeff.Prop
}
func customEucSimilar(iconA, iconB IconT, coeff *CustomCoefficients) bool {
func customEucSimilar(iconA, iconB IconT, coeff CustomCoefficients) bool {
m1, m2, m3 := EucMetric(iconA, iconB)
@ -45,7 +45,7 @@ func customEucSimilar(iconA, iconB IconT, coeff *CustomCoefficients) bool {
// Similar90270 works like Similar, but also considers rotations of ±90°.
// Those are rotations users might reasonably often do.
func CustomSimilar90270(iconA, iconB IconT, coeff *CustomCoefficients) bool {
func CustomSimilar90270(iconA, iconB IconT, coeff CustomCoefficients) bool {
if CustomSimilar(iconA, iconB, coeff) {
return true

16
custom_test.go
View File

@ -19,7 +19,7 @@ func TestCustomSimilar(t *testing.T) {
t.Errorf("distorted.jpg is NOT similar to large.jpg")
}
if !CustomSimilar(icon1, icon2, &CustomCoefficients{1, 1, 1, 10}) {
if !CustomSimilar(icon1, icon2, CustomCoefficients{1, 1, 1, 10}) {
t.Errorf("distorted.jpg IS similar to large.jpg, assuming proportion differences are widely tolerated.")
}
@ -36,36 +36,36 @@ func TestCustomSimilar(t *testing.T) {
}
// Luma.
if CustomSimilar(icon1, icon2, &CustomCoefficients{0, 1, 1, 1}) {
if CustomSimilar(icon1, icon2, CustomCoefficients{0, 1, 1, 1}) {
t.Errorf("1.jpg is NOT IDENTICAL to 2.jpg")
}
// Luma.
if CustomSimilar(icon1, icon2, &CustomCoefficients{0.4, 1, 1, 1}) {
if CustomSimilar(icon1, icon2, CustomCoefficients{0.4, 1, 1, 1}) {
t.Errorf("1.jpg is similar to 2.jpg, BUT NOT VERY SIMILAR")
}
// Chrominance b.
if CustomSimilar(icon1, icon2, &CustomCoefficients{1, 0.1, 1, 1}) {
if CustomSimilar(icon1, icon2, CustomCoefficients{1, 0.1, 1, 1}) {
t.Errorf("1.jpg is similar to 2.jpg, BUT NOT VERY SIMILAR")
}
// Chrominance c.
if CustomSimilar(icon1, icon2, &CustomCoefficients{1, 1, 0.1, 1}) {
if CustomSimilar(icon1, icon2, CustomCoefficients{1, 1, 0.1, 1}) {
t.Errorf("1.jpg is similar to 2.jpg, BUT NOT VERY SIMILAR")
}
// Image comparison to itself (or its own copy).
if !CustomSimilar(icon1, icon1, &CustomCoefficients{0, 0, 0, 0}) {
if !CustomSimilar(icon1, icon1, CustomCoefficients{0, 0, 0, 0}) {
t.Errorf("1.jpg IS IDENTICAL to itself")
}
if !CustomSimilar(icon1, icon1, &CustomCoefficients{0.5, 0.5, 0.5, 0.5}) {
if !CustomSimilar(icon1, icon1, CustomCoefficients{0.5, 0.5, 0.5, 0.5}) {
t.Errorf("1.jpg IS IDENTICAL to itself")
}
if !CustomSimilar(icon1, icon1, &CustomCoefficients{1, 1, 1, 1}) {
if !CustomSimilar(icon1, icon1, CustomCoefficients{1, 1, 1, 1}) {
t.Errorf("1.jpg IS IDENTICAL to itself")
}