CIccCamConverter Class Reference

#include <IccCAM.h>

Collaboration diagram for CIccCamConverter:

Public Member Functions
	CIccCamConverter ()
icFloatNumber	GetParameter_C ()
icFloatNumber	GetParameter_F ()
icFloatNumber	GetParameter_La ()
icFloatNumber	GetParameter_Nc ()
void	GetParameter_WhitePoint (icFloatNumber *whitePoint)
icFloatNumber	GetParameter_Yb ()
void	JabToXYZ (const icFloatNumber *jab, icFloatNumber *xyz, int nbr)
CIccCamConverter *	NewCopy () const
CIccCamConverter &	operator= (const CIccCamConverter &camcon)
void	SetParameter_C (icFloatNumber c)
void	SetParameter_F (icFloatNumber F)
void	SetParameter_La (icFloatNumber La)
void	SetParameter_Nc (icFloatNumber Nc)
void	SetParameter_WhitePoint (icFloatNumber *whitePoint)
void	SetParameter_Yb (icFloatNumber YB)
void	XYZToJab (const icFloatNumber *xyz, icFloatNumber *jab, int nbr)
	~CIccCamConverter ()

Private Member Functions
void	ab2chDeg (icFloatNumber a, icFloatNumber b, icFloatNumber &c, icFloatNumber &h)
void	CalcCoefficients ()
icFloatNumber	F_Function (icFloatNumber x)
icFloatNumber	H_Function (icFloatNumber x)
icFloatNumber	H_FunctionInv (icFloatNumber y)
icFloatNumber	Hyperbolic (icFloatNumber x)
icFloatNumber	HyperbolicInv (icFloatNumber x)
icFloatNumber	IccCam_e (icFloatNumber hue)
void	Multiply_vect_by_mx (const icFloatNumber *in, icFloatNumber *out, icFloatNumber m[3][3])
void	ReferenceConditions (icFloatNumber *rgb, icFloatNumber *rgbC)
void	ReferenceConditionsInv (icFloatNumber *rgbC, icFloatNumber *rgb)

Private Attributes
icFloatNumber	m_alfa
icFloatNumber	m_AWhite
icFloatNumber	m_c
icFloatNumber	m_cc
icFloatNumber	m_D
icFloatNumber	m_exp
icFloatNumber	m_F
icFloatNumber	m_factor
icFloatNumber	m_Fl
icFloatNumber	m_La
icFloatNumber	m_mFor [3][3]
icFloatNumber	m_mInv [3][3]
icFloatNumber	m_n
icFloatNumber	m_Nbb
icFloatNumber	m_Nc
icFloatNumber	m_rgbWhite [3]
icFloatNumber	m_WhitePoint [3]
icFloatNumber	m_x0
icFloatNumber	m_Yb
icFloatNumber	m_z

Detailed Description

Definition at line 84 of file IccCAM.h.

Constructor & Destructor Documentation

CIccCamConverter()

CIccCamConverter::CIccCamConverter

(

)

Definition at line 302 of file IccCAM.cpp.

{
//  for XYZwhite = D50, La = 500, Yb = 20, average surround
 
    /* the initializations are based on values for an average surround */
    m_La = (icFloatNumber) 500.0;
    m_Yb = (icFloatNumber)  20.0;
 
  m_WhitePoint[0] = icD50XYZ[0];
  m_WhitePoint[1] = icD50XYZ[1];
  m_WhitePoint[2] = icD50XYZ[2];
 
    /* the initializations are based on values for an average surround */
    m_c  = (icFloatNumber) 0.69;    /* impact surround */
    m_Nc = (icFloatNumber) 1.00;    /* chromatic induction factor */
    m_F  = (icFloatNumber) 1.00;    /* degree of adaptation factor */
 
    // ciecat02 = HPE
    m_mFor[0][0] =  0.38970f;   m_mFor[0][1] = 0.68898f;    m_mFor[0][2] = -0.07868f;
    m_mFor[1][0] = -0.22981f;   m_mFor[1][1] = 1.18340f;    m_mFor[1][2] =  0.04641f;
    m_mFor[2][0] =  0.00000f;   m_mFor[2][1] = 0.00000f;    m_mFor[2][2] =  1.00000f;
 
    m_mInv[0][0] = 1.910197f;   m_mInv[0][1] = -1.1121240f; m_mInv[0][2] =  0.201908f;
    m_mInv[1][0] = 0.370950f;   m_mInv[1][1] =  0.6290540f; m_mInv[1][2] =  0.000008f;
    m_mInv[2][0] = 0.000000f;   m_mInv[2][1] =  0.0000000f; m_mInv[2][2] =  1.000000f;
 
    /* precalculated values */
// m_x0 = 0.25 / 255
//  m_alfa = 0.041747f;
//  m_exp = 0.396f;
 
// m_x0 = 1 / 255
//  m_alfa = 0.089914f;
//  m_exp = 0.372f;
 
//  m_x0 = 4 / 255
//  m_alfa = 0.2307f;
//  m_exp = 0.3169f;
 
    m_alfa = 0.2307f;
    m_exp = 0.3169f;
 
    CalcCoefficients ();
}

References CalcCoefficients(), icD50XYZ, m_alfa, m_c, m_exp, m_F, m_La, m_mFor, m_mInv, m_Nc, m_WhitePoint, and m_Yb.

Referenced by NewCopy().

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~CIccCamConverter()

CIccCamConverter::~CIccCamConverter

(

)

Definition at line 349 of file IccCAM.cpp.

{
}

Member Function Documentation

ab2chDeg()

void CIccCamConverter::ab2chDeg ( icFloatNumber a, icFloatNumber b, icFloatNumber & c, icFloatNumber & h )

private

Definition at line 291 of file IccCAM.cpp.

{
  c = sqrt(a*a + b*b);
  h = (icFloatNumber)(atan2(b, a) * 180.0 / icPiNum);
  while (h<0.0)
    h+=360.0;
}

References icPiNum.

Referenced by JabToXYZ(), and XYZToJab().

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CalcCoefficients()

void CIccCamConverter::CalcCoefficients ( )

private

Definition at line 250 of file IccCAM.cpp.

{
    icFloatNumber   k, La5, rgbC[3], rgbP[3];
 
    double epow = pow (2.7182818, (-((double)m_La + 42.0)/92.0) );
    m_D = (icFloatNumber) (m_F *(1.0 - (epow/ 3.6)) );
 
    k = 1.0f / (5.0f * m_La + 1.0f);
    k = (icFloatNumber)(pow ((double)k, 4.0));
    La5 = 5.0f * m_La;
    m_Fl = (icFloatNumber)(0.2 * k * La5 + 0.1 * (1 - k) * (1 - k) * pow ((double)La5, 0.333333));
 
    m_n = m_Yb / m_WhitePoint[1];
 
    m_factor = (icFloatNumber) pow (1.64 - pow (0.29, (double) m_n), 0.73);
 
    m_Nbb = (icFloatNumber)(0.725 / pow ((double)(m_n), 0.2));
 
    m_z = (icFloatNumber)(1.48 + sqrt (m_n));
 
    Multiply_vect_by_mx (m_WhitePoint, m_rgbWhite, m_mFor);
 
    ReferenceConditions (m_rgbWhite, rgbC);
 
    // because CIECAT02 == HPE
    rgbP[0] = rgbC[0];
    rgbP[1] = rgbC[1];
    rgbP[2] = rgbC[2];
 
    rgbP[0] = Hyperbolic (m_Fl * rgbP[0] / 100) + 0.1f;
    rgbP[1] = Hyperbolic (m_Fl * rgbP[1] / 100) + 0.1f;
    rgbP[2] = Hyperbolic (m_Fl * rgbP[2] / 100) + 0.1f;
    m_AWhite = (icFloatNumber)((2.0 * rgbP[0] + rgbP[1] + rgbP[2] / 20.0 - 0.305) * m_Nbb);
 
//  m_x0 = (icFloatNumber) (m_Fl * 0.25 / 255.0);
// m_x0 = (icFloatNumber) (m_Fl * 1.00 / 255.0)
    m_x0 = (icFloatNumber) (m_Fl * 4.00 / 255.0);
    m_cc = ((1 + m_alfa) * H_Function (m_x0) / H_Function (m_Fl) - m_alfa) * F_Function (m_Fl) / m_x0;
}

References F_Function(), H_Function(), Hyperbolic(), m_alfa, m_AWhite, m_cc, m_D, m_F, m_factor, m_Fl, m_La, m_mFor, m_n, m_Nbb, m_rgbWhite, m_WhitePoint, m_x0, m_Yb, m_z, Multiply_vect_by_mx(), and ReferenceConditions().

Referenced by CIccCamConverter(), SetParameter_C(), SetParameter_F(), SetParameter_La(), SetParameter_Nc(), SetParameter_WhitePoint(), and SetParameter_Yb().

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F_Function()

icFloatNumber CIccCamConverter::F_Function ( icFloatNumber x )

private

Definition at line 115 of file IccCAM.cpp.

{
    icFloatNumber   y;
    y = (icFloatNumber) (400.0 * pow ((double)x, 0.42) / (27.13 + pow ((double)x, 0.42)));
    return y;
}

Referenced by CalcCoefficients(), Hyperbolic(), and HyperbolicInv().

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GetParameter_C()

icFloatNumber CIccCamConverter::GetParameter_C

(

)

Definition at line 446 of file IccCAM.cpp.

{
    return m_c;
}

References m_c.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccMpeCAM::Describe(), icXmlDumpColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Write().

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GetParameter_F()

icFloatNumber CIccCamConverter::GetParameter_F

(

)

Definition at line 462 of file IccCAM.cpp.

{
    return m_F;
}

References m_F.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccMpeCAM::Describe(), icXmlDumpColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Write().

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GetParameter_La()

icFloatNumber CIccCamConverter::GetParameter_La

(

)

Definition at line 430 of file IccCAM.cpp.

{
    return m_La;
}

References m_La.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccMpeCAM::Describe(), icXmlDumpColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Write().

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GetParameter_Nc()

icFloatNumber CIccCamConverter::GetParameter_Nc

(

)

Definition at line 454 of file IccCAM.cpp.

{
    return m_Nc;
}

References m_Nc.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccMpeCAM::Describe(), icXmlDumpColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Write().

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GetParameter_WhitePoint()

void CIccCamConverter::GetParameter_WhitePoint

(

icFloatNumber *

whitePoint

)

Definition at line 420 of file IccCAM.cpp.

{
    whitePoint[0] = m_WhitePoint[0];
    whitePoint[1] = m_WhitePoint[1];
    whitePoint[2] = m_WhitePoint[2];
}

References m_WhitePoint.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccMpeCAM::Describe(), icXmlDumpColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Write().

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GetParameter_Yb()

icFloatNumber CIccCamConverter::GetParameter_Yb

(

)

Definition at line 438 of file IccCAM.cpp.

{
    return m_Yb;
}

References m_Yb.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccMpeCAM::Describe(), icXmlDumpColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Write().

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H_Function()

icFloatNumber CIccCamConverter::H_Function ( icFloatNumber x )

private

Definition at line 125 of file IccCAM.cpp.

{
    icFloatNumber   y;
 
    y = (icFloatNumber) (400.0 * pow ((double)x, (double)m_exp) / (27.13 + pow ((double)x, (double)m_exp)));
 
    return y;
}

References m_exp.

Referenced by CalcCoefficients(), Hyperbolic(), and HyperbolicInv().

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H_FunctionInv()

icFloatNumber CIccCamConverter::H_FunctionInv ( icFloatNumber y )

private

Definition at line 137 of file IccCAM.cpp.

{
    icFloatNumber   x;
 
    x = (icFloatNumber) (pow (27.13*y / (400.0-y), 1.0/m_exp));
 
    return x;
}

References m_exp.

Referenced by HyperbolicInv().

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Hyperbolic()

icFloatNumber CIccCamConverter::Hyperbolic ( icFloatNumber x )

private

Definition at line 149 of file IccCAM.cpp.

{
    icFloatNumber   y;
 
    if (x < 0)
    {
        if (-x <= m_x0)
        {
            y = m_cc * x;
        }
        else
        {
            y = - ((1 + m_alfa) * H_Function (-x) / H_Function (m_Fl) - m_alfa) * F_Function (m_Fl);
        }
    }
    else
    {
        if (x <= m_x0)
        {
            y = m_cc * x;
        }
        else
        {
            y = ((1 + m_alfa) * H_Function (x) / H_Function (m_Fl) - m_alfa) * F_Function (m_Fl);
        }
    }
 
    return y;
}

References F_Function(), H_Function(), m_alfa, m_cc, m_Fl, and m_x0.

Referenced by CalcCoefficients(), and XYZToJab().

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HyperbolicInv()

icFloatNumber CIccCamConverter::HyperbolicInv ( icFloatNumber x )

private

Definition at line 182 of file IccCAM.cpp.

{
    icFloatNumber   x, h_y;
 
    if (y < 0)
    {
        if (-y <= (m_cc * m_x0))
        {
            x = y / m_cc;
        }
        else
        {
            h_y = (- y / F_Function (m_Fl) + m_alfa) / (1 + m_alfa) * H_Function (m_Fl);
            x = - H_FunctionInv (h_y);
        }
    }
    else
    {
        if (y <= (m_cc * m_x0))
        {
            x = y / m_cc;
        }
        else
        {
            h_y = (y / F_Function (m_Fl) + m_alfa) / (1 + m_alfa) * H_Function (m_Fl);
            x = H_FunctionInv (h_y);
        }
    }
 
    return x;
}

References F_Function(), H_Function(), H_FunctionInv(), m_alfa, m_cc, m_Fl, and m_x0.

Referenced by JabToXYZ().

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IccCam_e()

icFloatNumber CIccCamConverter::IccCam_e ( icFloatNumber hue )

private

Definition at line 217 of file IccCAM.cpp.

{
    int     i, j;
    icFloatNumber       offset;
    double  hdef[4] = {20.14, 90.00, 164.25, 237.53};
    double  edef[4] = {0.8, 0.7, 1.0, 1.2};
 
    for (i = 0; i < 4; i++)
        if (hue < hdef[i])
            break;
        
    j = i - 1;
    if (i == 0)
        j = 3;
    else if (i == 4)
        i = 0;
        
    if (i == 0)
    {
        offset = 360.0;
 
        if (hue <= hdef[0])
            hue += 360.0;
    }
    else
        offset = 0;
 
    return (icFloatNumber)(edef[j] + (edef[i] - edef[j]) * (hue - hdef[j]) / (offset + hdef[i] - hdef[j]));
}

JabToXYZ()

void CIccCamConverter::JabToXYZ	(	const icFloatNumber *	jab,
		icFloatNumber *	xyz,
		int	nbr )

Definition at line 528 of file IccCAM.cpp.

{
    int     i;
    icFloatNumber       rgb[3], rgbP[3], rgbC[3];
    icFloatNumber       lc, lh, lhr, et, p1, p2, p4, p5, p3, numerator;
    icFloatNumber       value, a, b, cotan, tanValue;
    double  exp = 1.0 / 0.9;
    double  A, ratio, C, t;
    const icFloatNumber*    h_jab;
    icFloatNumber*  h_xyz;
 
    h_jab = jab;
    h_xyz = xyz;
 
    for (i=0;i<nbr;i++)
    {
        if (h_jab[0] < 1.0e-5)
        {
            rgbP[0] = 0.1f;
            rgbP[1] = 0.1f;
            rgbP[2] = 0.1f;
        }
        else
        {
            C = sqrt (h_jab[1] * h_jab[1] + h_jab[2] * h_jab[2]);
 
            ratio = C / (sqrt (h_jab[0]/100.0) * m_factor);
            t = pow (ratio, exp);
            A = m_AWhite * pow (h_jab[0]/100.0, 1.0/(m_c*m_z));
 
            p2 = (icFloatNumber) ((A / m_Nbb + 0.305f) * 460.0 / 1403.0);
 
            if (t < 1.0e-5)
            {
                rgbP[0] = p2;
                rgbP[1] = p2;
                rgbP[2] = p2;
            }
            else
            {
                ab2chDeg (h_jab[1], h_jab[2], lc, lh);
                lhr = lh * (icFloatNumber)icPiNum / 180.0f;
 
                et = (icFloatNumber)((cos ((double)lhr + 2.0) + 3.8) / 4.0);
 
                p1 = (icFloatNumber)((50000.0f / 13.0f) * m_Nc * m_Nbb * et / t);
                p3 = 21.0f / 20.0f;
 
                numerator = p2 * (2.0f + p3);
 
                if ((lh <= 45) || (lh >= 315) || ((lh > 135) && (lh < 225))) /* |a| > |b| */
                {
                    tanValue = (icFloatNumber)(tan ((double)lhr));
 
                    if ((lh > 90) && (lh < 270))
                        value = (icFloatNumber)(- pow (1 + pow ((double)tanValue, 2.0), 0.5));
                    else
                        value = (icFloatNumber)(pow (1 + pow ((double)tanValue, 2.0), 0.5));
 
                    p5 = (icFloatNumber)(p1 * value);
 
                    a = (icFloatNumber)(numerator / (p5 + (2.0f+p3)*(220.0f/1403.0f) - (27.0f/1403.0f - p3*(6300.0f/1403.0f)) * tanValue));
                    b = a * tanValue;
                }
                else /* |b| > |a| */
                {
                    if (fabs (lh - 90) < 1.0e-5)
                        cotan = 0.0f;
                    else if (fabs (lh - 270) < 1.0e-5)
                        cotan = 0.0f;
                    else
                        cotan = (icFloatNumber)(1 / tan ((double)lhr));
 
                    if (lh > 180)
                        value = (icFloatNumber)(- pow (1 + pow ((double)cotan , 2.0), 0.5));
                    else
                        value = (icFloatNumber)(pow (1 + pow ((double)cotan, 2.0), 0.5));
 
                    p4 = (icFloatNumber)(p1 * value);
 
                    b = (icFloatNumber)(numerator / (p4 + (2.0f+p3)*(220.0f/1403.0f) * cotan - 27.0f/1403.0f + p3*(6300.0f/1403.0f)));
                    a = b * cotan;
                }
 
                rgbP[0] = (icFloatNumber)(p2 + ( 451.0 * a +  288.0 * b) / 1403.0);
                rgbP[1] = (icFloatNumber)(p2 + (-891.0 * a -  261.0 * b) / 1403.0);
                rgbP[2] = (icFloatNumber)(p2 + (-220.0 * a - 6300.0 * b) / 1403.0);
            }
        }
 
        if (rgbP[0] < 0) rgbP[0] = 0.0f;
        if (rgbP[1] < 0) rgbP[1] = 0.0f;
        if (rgbP[2] < 0) rgbP[2] = 0.0f;
 
        rgbC[0] = 100 * HyperbolicInv (rgbP[0] - 0.1f) / m_Fl;
        rgbC[1] = 100 * HyperbolicInv (rgbP[1] - 0.1f) / m_Fl;
        rgbC[2] = 100 * HyperbolicInv (rgbP[2] - 0.1f) / m_Fl;
 
        ReferenceConditionsInv (rgbC, rgb);
        Multiply_vect_by_mx (rgb, h_xyz, m_mInv);
 
        h_jab += 3;
        h_xyz += 3;
    }
}

References ab2chDeg(), HyperbolicInv(), icPiNum, m_AWhite, m_c, m_factor, m_Fl, m_mInv, m_Nbb, m_Nc, m_z, Multiply_vect_by_mx(), and ReferenceConditionsInv().

Referenced by CIccMpeJabToXYZ::Apply().

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Multiply_vect_by_mx()

void CIccCamConverter::Multiply_vect_by_mx ( const icFloatNumber * in, icFloatNumber * out, icFloatNumber m[3][3] )

private

Definition at line 81 of file IccCAM.cpp.

{
    out[0] = m[0][0] * in[0] + m[0][1] * in[1] + m[0][2] * in[2];
    out[1] = m[1][0] * in[0] + m[1][1] * in[1] + m[1][2] * in[2];
    out[2] = m[2][0] * in[0] + m[2][1] * in[1] + m[2][2] * in[2];
}

Referenced by CalcCoefficients(), JabToXYZ(), and XYZToJab().

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NewCopy()

CIccCamConverter * CIccCamConverter::NewCopy

(

)

const

Definition at line 354 of file IccCAM.cpp.

{
  CIccCamConverter *rv = new CIccCamConverter();
  *rv = *this;
  return rv;
}

References CIccCamConverter().

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operator=()

CIccCamConverter & CIccCamConverter::operator=

(

const CIccCamConverter &

camcon

)

Definition at line 636 of file IccCAM.cpp.

{
  memcpy(&m_WhitePoint, &camcon.m_WhitePoint, sizeof(m_WhitePoint));
  m_La=camcon.m_La; /* Absolute luminance of adapting field in cd/m^2 */
  m_Yb=camcon.m_Yb; /* relative luminance of background in cd/m^2 */
  m_c=camcon.m_c;   /* impact surround */
  m_Nc=camcon.m_Nc; /* chromatic induction factor */
  m_F=camcon.m_F;   /* degree of adaptation factor */
  memcpy(&m_mFor, &camcon.m_mFor, sizeof(m_mFor));
  memcpy(&m_mInv, &camcon.m_mInv, sizeof(m_mInv));
  m_factor=camcon.m_factor;
 
  //Additional non-provided parameters
  //Yw is relative luminance of adapting field in cd/m^2
  //LW is absolute luminance of the reference white in cd/m^2
 
  // parameters precalculations
  memcpy(m_rgbWhite, camcon.m_rgbWhite, sizeof(m_rgbWhite));
  m_D=camcon.m_D;
  m_Fl=camcon.m_Fl;
  m_n=camcon.m_n;
  m_Nbb=camcon.m_Nbb;
  m_z=camcon.m_z;
  m_AWhite=camcon.m_AWhite;
 
  // parameters for corrected hyperbolic function
  m_x0=camcon.m_x0;
  m_cc=camcon.m_cc;
  m_alfa=camcon.m_alfa;
  m_exp=camcon.m_exp;
 
  return *this;
}

References m_alfa, m_AWhite, m_c, m_cc, m_D, m_exp, m_F, m_factor, m_Fl, m_La, m_mFor, m_mInv, m_n, m_Nbb, m_Nc, m_rgbWhite, m_WhitePoint, m_x0, m_Yb, and m_z.

ReferenceConditions()

void CIccCamConverter::ReferenceConditions ( icFloatNumber * rgb, icFloatNumber * rgbC )

private

Definition at line 93 of file IccCAM.cpp.

{
    rgbC[0] = (icFloatNumber)((m_D * m_WhitePoint[1] / m_rgbWhite[0] + 1.0 - m_D) * rgb[0]);
    rgbC[1] = (icFloatNumber)((m_D * m_WhitePoint[1] / m_rgbWhite[1] + 1.0 - m_D) * rgb[1]);
    rgbC[2] = (icFloatNumber)((m_D * m_WhitePoint[1] / m_rgbWhite[2] + 1.0 - m_D) * rgb[2]);
}

References m_D, m_rgbWhite, and m_WhitePoint.

Referenced by CalcCoefficients(), and XYZToJab().

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ReferenceConditionsInv()

void CIccCamConverter::ReferenceConditionsInv ( icFloatNumber * rgbC, icFloatNumber * rgb )

private

Definition at line 104 of file IccCAM.cpp.

{
    rgb[0] = (icFloatNumber)(rgbC[0] / (m_D * m_WhitePoint[1] / m_rgbWhite[0] + 1.0 - m_D));
    rgb[1] = (icFloatNumber)(rgbC[1] / (m_D * m_WhitePoint[1] / m_rgbWhite[1] + 1.0 - m_D));
    rgb[2] = (icFloatNumber)(rgbC[2] / (m_D * m_WhitePoint[1] / m_rgbWhite[2] + 1.0 - m_D));
}

References m_D, m_rgbWhite, and m_WhitePoint.

Referenced by JabToXYZ().

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SetParameter_C()

void CIccCamConverter::SetParameter_C

(

icFloatNumber

c

)

Definition at line 393 of file IccCAM.cpp.

{
    m_c = c;
    CalcCoefficients ();
}

References CalcCoefficients(), and m_c.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccDefaultEncProfileConverter::ConvertFromParams(), icXmlParseColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Read().

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SetParameter_F()

void CIccCamConverter::SetParameter_F

(

icFloatNumber

F

)

Definition at line 411 of file IccCAM.cpp.

{
    m_F = F;
    CalcCoefficients ();
}

References CalcCoefficients(), F, and m_F.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccDefaultEncProfileConverter::ConvertFromParams(), icXmlParseColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Read().

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SetParameter_La()

void CIccCamConverter::SetParameter_La

(

icFloatNumber

La

)

Definition at line 375 of file IccCAM.cpp.

{
    m_La = La;
    CalcCoefficients ();
}

References CalcCoefficients(), and m_La.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccDefaultEncProfileConverter::ConvertFromParams(), icXmlParseColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Read().

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SetParameter_Nc()

void CIccCamConverter::SetParameter_Nc

(

icFloatNumber

Nc

)

Definition at line 402 of file IccCAM.cpp.

{
    m_Nc = Nc;
    CalcCoefficients ();
}

References CalcCoefficients(), and m_Nc.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccDefaultEncProfileConverter::ConvertFromParams(), icXmlParseColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Read().

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SetParameter_WhitePoint()

void CIccCamConverter::SetParameter_WhitePoint

(

icFloatNumber *

whitePoint

)

Definition at line 364 of file IccCAM.cpp.

{
    m_WhitePoint[0] = whitePoint[0];
    m_WhitePoint[1] = whitePoint[1];
    m_WhitePoint[2] = whitePoint[2];
    CalcCoefficients ();
}

References CalcCoefficients(), and m_WhitePoint.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccDefaultEncProfileConverter::ConvertFromParams(), icXmlParseColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Read().

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SetParameter_Yb()

void CIccCamConverter::SetParameter_Yb

(

icFloatNumber

YB

)

Definition at line 384 of file IccCAM.cpp.

{
    m_Yb = Yb;
    CalcCoefficients ();
}

References CalcCoefficients(), and m_Yb.

Referenced by CIccMpeJabToXYZ::CIccMpeJabToXYZ(), CIccMpeXYZToJab::CIccMpeXYZToJab(), CIccDefaultEncProfileConverter::ConvertFromParams(), icXmlParseColorAppearanceParams(), CIccMpeJabToXYZ::operator=(), CIccMpeXYZToJab::operator=(), and CIccMpeCAM::Read().

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XYZToJab()

void CIccCamConverter::XYZToJab	(	const icFloatNumber *	xyz,
		icFloatNumber *	jab,
		int	nbr )

Definition at line 470 of file IccCAM.cpp.

{
    int     k;
    icFloatNumber       rgb[3], rgbC[3], rgbP[3];
    icFloatNumber       la, lb, lc, lchroma, lh, lhr, A, J, et, t, C, ac, bc;
    const icFloatNumber*    h_xyz;
    icFloatNumber*  h_jab;
 
    h_xyz = xyz;
    h_jab = jab;
 
    for (k=0;k<nbr;k++)
    {
        Multiply_vect_by_mx (h_xyz, rgb, m_mFor);
 
        // clipping to the HPE triangle
        if (rgb[0] < 0) rgb[0] = 0.0f;
        if (rgb[1] < 0) rgb[1] = 0.0f;
        if (rgb[2] < 0) rgb[2] = 0.0f;
 
        ReferenceConditions (rgb, rgbC);
 
        rgbP[0] = Hyperbolic (m_Fl * rgbC[0] / 100) + 0.1f;
        rgbP[1] = Hyperbolic (m_Fl * rgbC[1] / 100) + 0.1f;
        rgbP[2] = Hyperbolic (m_Fl * rgbC[2] / 100) + 0.1f;
 
        la = (icFloatNumber)(rgbP[0] - 12.0 * rgbP[1] / 11.0 + rgbP[2] / 11.0);
        lb = (icFloatNumber)((rgbP[0] + rgbP[1] - 2.0 * rgbP[2] ) / 9.0);
        lchroma = (icFloatNumber)(sqrt (la * la + lb * lb));
 
        ab2chDeg (la, lb, lc, lh);
        lhr = lh * (icFloatNumber)icPiNum / 180.0f;
 
        A = (icFloatNumber)((2.0 * rgbP[0] + rgbP[1] + rgbP[2] / 20.0 - 0.305) * m_Nbb);
 
        J = (icFloatNumber)(100.0 * pow (A / m_AWhite, m_c * m_z));
 
        et = (icFloatNumber)((cos(lhr + 2.0) + 3.8) / 4.0);
        t = (icFloatNumber)(50.0 * lchroma * 100 * et  * 10.0/13.0 * m_Nc * m_Nbb / (rgbP[0]+rgbP[1]+21.0/20.0*rgbP[2]));
        C = (icFloatNumber)(pow((double)t, 0.9) * sqrt ((double)(J/100.0)) * m_factor);
 
        ac = (icFloatNumber)(C * cos(lhr));
        bc = (icFloatNumber)(C * sin(lhr));
 
        h_jab[0] = J;
        h_jab[1] = ac;
        h_jab[2] = bc;
 
        h_xyz += 3;
        h_jab += 3;
    }
}

References ab2chDeg(), Hyperbolic(), icPiNum, m_AWhite, m_c, m_factor, m_Fl, m_mFor, m_Nbb, m_Nc, m_z, Multiply_vect_by_mx(), and ReferenceConditions().

Referenced by CIccMpeXYZToJab::Apply().

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Member Data Documentation

m_alfa

icFloatNumber CIccCamConverter::m_alfa

private

Definition at line 114 of file IccCAM.h.

Referenced by CalcCoefficients(), CIccCamConverter(), Hyperbolic(), HyperbolicInv(), and operator=().

m_AWhite

icFloatNumber CIccCamConverter::m_AWhite

private

Definition at line 109 of file IccCAM.h.

Referenced by CalcCoefficients(), JabToXYZ(), operator=(), and XYZToJab().

m_c

icFloatNumber CIccCamConverter::m_c

private

Definition at line 91 of file IccCAM.h.

Referenced by CIccCamConverter(), GetParameter_C(), JabToXYZ(), operator=(), SetParameter_C(), and XYZToJab().

m_cc

icFloatNumber CIccCamConverter::m_cc

private

Definition at line 113 of file IccCAM.h.

Referenced by CalcCoefficients(), Hyperbolic(), HyperbolicInv(), and operator=().

m_D

icFloatNumber CIccCamConverter::m_D

private

Definition at line 104 of file IccCAM.h.

Referenced by CalcCoefficients(), operator=(), ReferenceConditions(), and ReferenceConditionsInv().

m_exp

icFloatNumber CIccCamConverter::m_exp

private

Definition at line 115 of file IccCAM.h.

Referenced by CIccCamConverter(), H_Function(), H_FunctionInv(), and operator=().

m_F

icFloatNumber CIccCamConverter::m_F

private

Definition at line 93 of file IccCAM.h.

Referenced by CalcCoefficients(), CIccCamConverter(), GetParameter_F(), operator=(), and SetParameter_F().

m_factor

icFloatNumber CIccCamConverter::m_factor

private

Definition at line 96 of file IccCAM.h.

Referenced by CalcCoefficients(), JabToXYZ(), operator=(), and XYZToJab().

m_Fl

icFloatNumber CIccCamConverter::m_Fl

private

Definition at line 105 of file IccCAM.h.

Referenced by CalcCoefficients(), Hyperbolic(), HyperbolicInv(), JabToXYZ(), operator=(), and XYZToJab().

m_La

icFloatNumber CIccCamConverter::m_La

private

Definition at line 89 of file IccCAM.h.

Referenced by CalcCoefficients(), CIccCamConverter(), GetParameter_La(), operator=(), and SetParameter_La().

m_mFor

icFloatNumber CIccCamConverter::m_mFor[3][3]

private

Definition at line 94 of file IccCAM.h.

Referenced by CalcCoefficients(), CIccCamConverter(), operator=(), and XYZToJab().

m_mInv

icFloatNumber CIccCamConverter::m_mInv[3][3]

private

Definition at line 95 of file IccCAM.h.

Referenced by CIccCamConverter(), JabToXYZ(), and operator=().

m_n

icFloatNumber CIccCamConverter::m_n

private

Definition at line 106 of file IccCAM.h.

Referenced by CalcCoefficients(), and operator=().

m_Nbb

icFloatNumber CIccCamConverter::m_Nbb

private

Definition at line 107 of file IccCAM.h.

Referenced by CalcCoefficients(), JabToXYZ(), operator=(), and XYZToJab().

m_Nc

icFloatNumber CIccCamConverter::m_Nc

private

Definition at line 92 of file IccCAM.h.

Referenced by CIccCamConverter(), GetParameter_Nc(), JabToXYZ(), operator=(), SetParameter_Nc(), and XYZToJab().

m_rgbWhite

icFloatNumber CIccCamConverter::m_rgbWhite[3]

private

Definition at line 103 of file IccCAM.h.

Referenced by CalcCoefficients(), operator=(), ReferenceConditions(), and ReferenceConditionsInv().

m_WhitePoint

icFloatNumber CIccCamConverter::m_WhitePoint[3]

private

Definition at line 88 of file IccCAM.h.

Referenced by CalcCoefficients(), CIccCamConverter(), GetParameter_WhitePoint(), operator=(), ReferenceConditions(), ReferenceConditionsInv(), and SetParameter_WhitePoint().

m_x0

icFloatNumber CIccCamConverter::m_x0

private

Definition at line 112 of file IccCAM.h.

Referenced by CalcCoefficients(), Hyperbolic(), HyperbolicInv(), and operator=().

m_Yb

icFloatNumber CIccCamConverter::m_Yb

private

Definition at line 90 of file IccCAM.h.

Referenced by CalcCoefficients(), CIccCamConverter(), GetParameter_Yb(), operator=(), and SetParameter_Yb().

m_z

icFloatNumber CIccCamConverter::m_z

private

Definition at line 108 of file IccCAM.h.

Referenced by CalcCoefficients(), JabToXYZ(), operator=(), and XYZToJab().

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The documentation for this class was generated from the following files:

• IccProfLib/IccCAM.h
• IccProfLib/IccCAM.cpp