kaze/orx
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[orx-color] handling of out of gamut inputs in spectralUpsampling

Browse Source
This commit is contained in:
Edwin Jakobs
2023-12-13 17:06:19 +01:00
parent ebedbb6b42
commit 1ef7cdc278
1 changed files with 11 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
orx-color/src/commonMain/kotlin/mixing/Spectral.kt
View File

@@ -388,24 +388,24 @@ private fun spectralUpsampling(rgb: ColorRGBa): DoubleArray {
lrgb = lrgb.copy(r = lrgb.r - w, g = lrgb.g - w, lrgb.b - w)
val c = min(lrgb.g, lrgb.b)
val m = min(lrgb.r, lrgb.b)
val y = min(lrgb.r, lrgb.g)
val c = max(0.0, min(lrgb.g, lrgb.b))
val m = max(0.0, min(lrgb.r, lrgb.b))
val y = max(0.0, min(lrgb.r, lrgb.g))
val r = max(0.0, min(lrgb.r - lrgb.b, lrgb.r - lrgb.g))
val g = max(0.0, min(lrgb.g - lrgb.b, lrgb.g - lrgb.r))
val b = max(0.0, min(lrgb.b - lrgb.g, lrgb.b - lrgb.r))
return doubleArrayOf(w, c, m, y, r, g, b)
return doubleArrayOf(max(0.0, w), c, m, y, r, g, b)
}
internal fun linearToReflectance(rgb: ColorRGBa): DoubleArray {
val eps = 0.00000001
val weights = spectralUpsampling(rgb)
val R = DoubleArray(38)
val reflectance = DoubleArray(38)
for (i in 0 until 38) {
R[i] = max(
reflectance[i] = max(
eps,
weights[0] +
weights[1] * SPD_C[i] +
@@ -416,7 +416,7 @@ internal fun linearToReflectance(rgb: ColorRGBa): DoubleArray {
weights[6] * SPD_B[i]
)
}
return R
return reflectance
}
private fun linearToConcentration(l1: Double, l2: Double, t: Double): Double {
@@ -434,10 +434,10 @@ private fun DoubleArray.dot(other: DoubleArray): Double {
return d
}
internal fun reflectanceToXYZ(R: DoubleArray): ColorXYZa {
val x = R.dot(CIE_CMF_X)
val y = R.dot(CIE_CMF_Y)
val z = R.dot(CIE_CMF_Z)
internal fun reflectanceToXYZ(reflectance: DoubleArray): ColorXYZa {
val x = reflectance.dot(CIE_CMF_X)
val y = reflectance.dot(CIE_CMF_Y)
val z = reflectance.dot(CIE_CMF_Z)
return ColorXYZa(x, y, z)
}