-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Seperate shared functions into detailed helper files
- Loading branch information
Showing
20 changed files
with
509 additions
and
510 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,207 @@ | ||
|
|
||
| #if !defined(INCLUDE_COLORSPACES) | ||
| #define INCLUDE_COLORSPACES | ||
|
|
||
| float3 GetSumChromaticity(float3 Color, int Method) | ||
| { | ||
| float Sum = 0.0; | ||
| float White = 0.0; | ||
|
|
||
| switch(Method) | ||
| { | ||
| case 0: // Length | ||
| Sum = length(Color); | ||
| White = 1.0 / sqrt(3.0); | ||
| break; | ||
| case 1: // Dot3 Average | ||
| Sum = dot(Color, 1.0 / 3.0); | ||
| White = 1.0; | ||
| break; | ||
| case 2: // Dot3 Sum | ||
| Sum = dot(Color, 1.0); | ||
| White = 1.0 / 3.0; | ||
| break; | ||
| case 3: // Max | ||
| Sum = max(max(Color.r, Color.g), Color.b); | ||
| White = 1.0; | ||
| break; | ||
| } | ||
|
|
||
| float3 Chromaticity = (Sum == 0.0) ? White : Color / Sum; | ||
| return Chromaticity; | ||
| } | ||
|
|
||
| /* | ||
| Ratio-based chromaticity | ||
| */ | ||
|
|
||
| float2 GetRatioRG(float3 Color) | ||
| { | ||
| float2 Ratio = (Color.z == 0.0) ? 1.0 : Color.xy / Color.zz; | ||
| // x / (x + 1.0) normalizes to [0, 1] range | ||
| return Ratio / (Ratio + 1.0); | ||
| } | ||
|
|
||
| /* | ||
| https://www.microsoft.com/en-us/research/publication/ycocg-r-a-color-space-with-rgb-reversibility-and-low-dynamic-range/ | ||
| --- | ||
| YCoCg-R: A Color Space with RGB Reversibility and Low Dynamic Range | ||
| Henrique S. Malvar, Gary Sullivan | ||
| MSR-TR-2003-103 | July 2003 | ||
| --- | ||
| Technical contribution to the H.264 Video Coding Standard. Joint Video Team (JVT) of ISO/IEC MPEG & ITU-T VCEG (ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6) Document JVT-I014r3. | ||
| */ | ||
|
|
||
| float2 GetCoCg(float3 Color) | ||
| { | ||
| float2 CoCg = 0.0; | ||
| float2x3 MatCoCg = float2x3 | ||
| ( | ||
| float3(1.0, 0.0, -1.0), | ||
| float3(-0.5, 1.0, -0.5) | ||
| ); | ||
|
|
||
| CoCg.x = dot(Color, MatCoCg[0]); | ||
| CoCg.y = dot(Color, MatCoCg[1]); | ||
|
|
||
| return (CoCg * 0.5) + 0.5; | ||
| } | ||
|
|
||
| /* | ||
| RGB to CrCb | ||
| --- | ||
| https://docs.opencv.org/4.7.0/de/d25/imgproc_color_conversions.html | ||
| */ | ||
|
|
||
| float2 GetCrCb(float3 Color) | ||
| { | ||
| float Y = dot(Color, float3(0.299, 0.587, 0.114)); | ||
| return ((Color.br - Y) * float2(0.564, 0.713)) + 0.5; | ||
| } | ||
|
|
||
| /* | ||
| RGB to saturation value. | ||
| --- | ||
| Golland, Polina, and Alfred M. Bruckstein. "Motion from color." | ||
| Computer Vision and Image Understanding 68, no. 3 (1997): 346-362. | ||
| --- | ||
| http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1995/CIS/CIS9513.pdf | ||
| */ | ||
|
|
||
| float SaturateRGB(float3 Color) | ||
| { | ||
| // Calculate min and max RGB | ||
| float MinColor = min(min(Color.r, Color.g), Color.b); | ||
| float MaxColor = max(max(Color.r, Color.g), Color.b); | ||
|
|
||
| // Calculate normalized RGB | ||
| float SatRGB = (MaxColor - MinColor) / MaxColor; | ||
| SatRGB = (MaxColor == 0.0) ? 0.0 : SatRGB; | ||
|
|
||
| return SatRGB; | ||
| } | ||
|
|
||
| /* | ||
| Color-space conversion | ||
| --- | ||
| https://github.com/colour-science/colour | ||
| --- | ||
| Copyright 2013 Colour Developers | ||
| Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: | ||
| 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. | ||
| 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. | ||
| 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. | ||
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE | ||
| */ | ||
|
|
||
| float3 GetHSVfromRGB(float3 Color) | ||
| { | ||
| float MinRGB = min(min(Color.r, Color.g), Color.b); | ||
| float MaxRGB = max(max(Color.r, Color.g), Color.b); | ||
| float DeltaRGB = MaxRGB - MinRGB; | ||
|
|
||
| // Calculate hue | ||
| float3 Hue = (Color.gbr - Color.brg) / DeltaRGB; | ||
| Hue = (Hue * (60.0 / 360.0)) + (float3(0.0, 120.0, 240.0) / 360.0); | ||
| float OutputHue = 0.0; | ||
| OutputHue = (MaxRGB == Color.r) ? Hue.r : OutputHue; | ||
| OutputHue = (MaxRGB == Color.g) ? Hue.g : OutputHue; | ||
| OutputHue = (MaxRGB == Color.b) ? Hue.b : OutputHue; | ||
|
|
||
| float3 Output = 0.0; | ||
| Output.x = (DeltaRGB == 0.0) ? 0.0 : OutputHue; | ||
| Output.y = (DeltaRGB == 0.0) ? 0.0 : DeltaRGB / MaxRGB; | ||
| Output.z = MaxRGB; | ||
| return Output; | ||
| } | ||
|
|
||
| float3 GetHSLfromRGB(float3 Color) | ||
| { | ||
| float MinRGB = min(min(Color.r, Color.g), Color.b); | ||
| float MaxRGB = max(max(Color.r, Color.g), Color.b); | ||
| float AddRGB = MaxRGB + MinRGB; | ||
| float DeltaRGB = MaxRGB - MinRGB; | ||
|
|
||
| float Lightness = AddRGB / 2.0; | ||
| float Saturation = (Lightness < 0.5) ? DeltaRGB / AddRGB : DeltaRGB / (2.0 - AddRGB); | ||
|
|
||
| // Calculate hue | ||
| float3 Hue = (Color.gbr - Color.brg) / DeltaRGB; | ||
| Hue = (Hue * (60.0 / 360.0)) + (float3(0.0, 120.0, 240.0) / 360.0); | ||
| float OutputHue = 0.0; | ||
| OutputHue = (MaxRGB == Color.r) ? Hue.r : OutputHue; | ||
| OutputHue = (MaxRGB == Color.g) ? Hue.g : OutputHue; | ||
| OutputHue = (MaxRGB == Color.b) ? Hue.b : OutputHue; | ||
|
|
||
| float3 Output = 0.0; | ||
| Output.x = (DeltaRGB == 0.0) ? 0.0 : OutputHue; | ||
| Output.y = (DeltaRGB == 0.0) ? 0.0 : Saturation; | ||
| Output.z = Lightness; | ||
| return Output; | ||
| } | ||
|
|
||
| /* | ||
| This code is based on the algorithm described in the following paper: | ||
| Author(s): Joost van de Weijer, T. Gevers | ||
| Title: "Robust optical flow from photometric invariants" | ||
| Year: 2004 | ||
| DOI: 10.1109/ICIP.2004.1421433 | ||
| Link: https://www.researchgate.net/publication/4138051_Robust_optical_flow_from_photometric_invariants | ||
| */ | ||
|
|
||
| float2 GetSphericalRG(float3 Color) | ||
| { | ||
| const float HalfPi = 1.0 / acos(0.0); | ||
|
|
||
| // Precalculate (x*x + y*y)^0.5 and (x*x + y*y + z*z)^0.5 | ||
| float L1 = length(Color.rg); | ||
| float L2 = length(Color.rgb); | ||
|
|
||
| float2 Angles = 0.0; | ||
| Angles[0] = (L1 == 0.0) ? 1.0 / sqrt(2.0) : Color.g / L1; | ||
| Angles[1] = (L2 == 0.0) ? 1.0 / sqrt(3.0) : L1 / L2; | ||
|
|
||
| return saturate(asin(abs(Angles)) * HalfPi); | ||
| } | ||
|
|
||
| float3 GetHSIfromRGB(float3 Color) | ||
| { | ||
| float3 O = Color.rrr; | ||
| O += (Color.ggg * float3(-1.0, 1.0, 1.0)); | ||
| O += (Color.bbb * float3(0.0, -2.0, 1.0)); | ||
| O *= rsqrt(float3(2.0, 6.0, 3.0)); | ||
|
|
||
| float H = atan(O.x/O.y) / acos(0.0); | ||
| H = (H * 0.5) + 0.5; // We also scale to [0,1] range | ||
| float S = length(O.xy); | ||
| float I = O.z; | ||
|
|
||
| return float3(H, S, I); | ||
| } | ||
|
|
||
| #endif |
Oops, something went wrong.