Making connections with iccMAX

A guide to understanding how profile connection works using iccMAX profiles

iccMAX profile connection   Background and basics  Transform Selection and PCS Adjustment

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Combining Transform Selection and PCS Adjustment

Below is a table of combined V2/V4 transform selection based on transform selection parameters and rendering intents.

Transform selection parameters				Transform and PCS Adjustment
Profile Class	Profile Position	Rendering Intent	Transform Type	Transform Tag	Transform Endpoints	PCS Adjustment
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Perceptual	Colour LUT-based	AtoB0Tag	Device to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Perceptual	Colour MPE-based	DtoB0Tag	Device to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Relative	Colour LUT-based	AtoB1Tag	Device to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Relative	Colour MPE-based	DtoB1Tag	Device to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Saturation	Colour LUT-based	AtoB2Tag	Device to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Saturation	Colour MPE-based	DtoB2Tag	Device to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Absolute	Colour LUT-based	AtoB1Tag	Device to XYZ/Lab PCS	Relative to Absolute
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Absolute	Colour MPE-based	DtoB1Tag	Device to XYZ/Lab PCS	Relative to Absolute
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Perceptual	Colour LUT-based	BtoA0Tag	XYZ/Lab PCS to Device	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Perceptual	Colour MPE-based	BtoD0Tag	XYZ/Lab PCS to Device	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Relative	Colour LUT-based	BtoA1Tag	XYZ/Lab PCS to Device	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Relative	Colour MPE-based	BtoD1Tag	XYZ/Lab PCS to Device	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Saturation	Colour LUT-based	BtoA2Ta	XYZ/Lab PCS to Device	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Saturation	Colour MPE-based	BtoD2Tag	XYZ/Lab PCS to Device	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Absolute	Colour LUT-based	BtoD1Tag	XYZ/Lab PCS to Device	Absolute to Relative
N-component LUT-based Input / Display / Output / ColorSpace	1→2	Absolute	Colour MPE-based	BtoD1Tag	XYZ/Lab PCS to Device	Absolute to Relative
N-component LUT-based Input / Display / Output / ColorSpace	1→2→3	Perceptual	Preview	Preview0Tag	XYZ/Lab PCS to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2→3	Relative	Preview	Preview1Tag	XYZ/Lab PCS to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1→2→3	Saturation	Preview	Preview2Tag	XYZ/Lab PCS to XYZ/Lab PCS	None
N-component LUT-based Input / Display / Output / ColorSpace	1	Any	Gamut	gamutTag	Device to Boolean	No PCS
3-component Matrix-based Input / Display	1→2	Perceptual / Relative / Saturation	Colour Matrix/TRC	Curves in redTRCTag, greenTRCTag, blueTRCTag followed by matrix using redMatrixColumnTag, greenMatrixColumnTag, blueMatrixColumnTag	Device to XYZ PCS	None
3-component Matrix-based Input / Display	1→2	Absolute	Colour Matrix/TRC	Curves in redTRCTag, greenTRCTag, blueTRCTag followed by matrix using redMatrixColumnTag, greenMatrixColumnTag, blueMatrixColumnTag	Device to XYZ PCS	Relative to Absolute
3-component Matrix-based Input / Display	1→2	Perceptual / Relative / Saturation	Colour Matrix/TRC	Inverse of matrix using redMatrixColumnTag, greenMatrixColumnTag, blueMatrixColumnTag followd by inverse of curves in redTRCTag, greenTRCTag, blueTRCTag	XYZ PCS To Device	None
3-component Matrix-based Input / Display	1→2	Perceptual / Relative / Saturation	Colour Matrix/TRC	Inverse of matrix using redMatrixColumnTag, greenMatrixColumnTag, blueMatrixColumnTag followd by inverse of curves in redTRCTag, greenTRCTag, blueTRCTag	XYZ PCS To Device	Absolute to Relative
Abstract	1→2→3	Any	Colour LUT-based	AtoB0Tag	XYZ/Lab PCS to XYZ/Lab PCS	None
Abstract	1→2→3	Any	Colour MPE-based	DtoB0Tag	XYZ/Lab PCS to XYZ/Lab PCS	None
DeviceLink	1	Any	Colour LUT-based	AtoB0Tag	Device to Device	None
DeviceLink	1	Any	Colour MPE-based	DtoB0Tag	Device to Device	None
NamedColor	1	Any	Any	namedColor2Tag	Name to XYZ/Lab PCS, Name to Device, XYZ/Lab PCS to Name, Device to Name	None

Table 1

Note: The transforms in Table 1 are relative to the profile position that is bold and underlined.

Device-to-device connection

One additional common form of profile connection using V2/V4 profiles is to apply successive sequences of profiles passing the results coming out of one sequence directly as input to the following sequence. This can either be done by the calling application or within some CMMs. When a CMM performs this successive application the device values are passed directly in the same order without any modification. An example of this is simulation or soft proofing where the first sequence performs colour management to an intermediate device (with its associated gamut mapping and rendering), and the second sequence uses colour management to provide a "view" of the results on a tertiary device. This is accomplished using a sequence such as (1→2 : 2→3) where the ':' represents a direct transfer of device values.

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