Expand description
Macbeth Chart module
Color Correction Model
Introduction
ColorCharts are a tool for calibrating the color profile of camera, which not only depends on the intrinsic and extrinsic parameters of camera but also on the lighting conditions. This is done by taking the image of a chart, such that the value of its colors present in it known, in the image the color values changes depeding on many variables, this gives us the colors initially present and the colors that are present in the image, based on this information we can apply any suitable algorithm to find the actual color of all the objects present in the image.
Modules
Structs
Core class of ccm model
Parameters for the detectMarker process:
Enums
Enum of the possible types of ccm.
Macbeth and Vinyl ColorChecker with 2deg D50
Enum of possible functions to calculate the distance between colors.
Enum of the possible types of initial method.
Linearization transformation type
TYPECHART
Constants
The CCM with the shape inline formula performs linear transformation on color values.
The CCM with the shape inline formula performs affine transformation.
DigitalSG ColorChecker with 140 squares
Macbeth ColorChecker
DKK ColorChecker
https://en.wikipedia.org/wiki/Adobe_RGB_color_space , RGB color space
https://en.wikipedia.org/wiki/Adobe_RGB_color_space , linear RGB color space
https://en.wikipedia.org/wiki/RGB_color_space , RGB color space
https://en.wikipedia.org/wiki/RGB_color_space , linear RGB color space
https://en.wikipedia.org/wiki/DCI-P3 , RGB color space
https://en.wikipedia.org/wiki/DCI-P3 , linear RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
https://en.wikipedia.org/wiki/CIELAB_color_space , non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
https://en.wikipedia.org/wiki/ProPhoto_RGB_color_space , RGB color space
https://en.wikipedia.org/wiki/ProPhoto_RGB_color_space , linear RGB color space
https://en.wikipedia.org/wiki/Rec._709 , RGB color space
https://en.wikipedia.org/wiki/Rec._709 , linear RGB color space
https://en.wikipedia.org/wiki/Rec._2020 , RGB color space
https://en.wikipedia.org/wiki/Rec._2020 , linear RGB color space
https://en.wikipedia.org/wiki/Wide-gamut_RGB_color_space , RGB color space
https://en.wikipedia.org/wiki/Wide-gamut_RGB_color_space , linear RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
https://en.wikipedia.org/wiki/CIE_1931_color_space , non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
non-RGB color space
https://en.wikipedia.org/wiki/SRGB , RGB color space
https://en.wikipedia.org/wiki/SRGB , linear RGB color space
The 1976 formula is the first formula that related a measured color difference to a known set of CIELAB coordinates.
The 1976 definition was extended to address perceptual non-uniformities.
In 1984, the Colour Measurement Committee of the Society of Dyers and Colourists defined a difference measure, also based on the LCh color model.
Euclidean distance of rgb color space
Euclidean distance of rgbl color space
the least square method is an optimal solution under the linear RGB distance function
The white balance method. The initial value is:
logarithmic polynomial fitting channels respectively; Need assign a value to deg simultaneously
polynomial fitting channels respectively; Need assign a value to deg simultaneously
gamma correction; Need assign a value to gamma simultaneously
grayscale Logarithmic polynomial fitting; Need assign a value to deg and dst_whites simultaneously
grayscale polynomial fitting; Need assign a value to deg and dst_whites simultaneously
no change is made
Standard Macbeth Chart with 24 squares
DigitalSG with 140 squares
DKK color chart with 12 squares and 6 rectangle
Traits
Core class of ccm model
CChecker
A class to find the positions of the ColorCharts in the image.
\brief checker draw
Parameters for the detectMarker process: