BabelColor logo
BabelColor CT&A Screen Shots

 
Home
Software Specs
Software Download
Software Purchase
White Target
Services
F.A.Q.
Tutorials
ColorChecker
Books
Links

 


(more info)


BabelColor icon  BabelColor CT&A Screenshots

Click on the following links to go to the thumbnails below, then click on a thumbnail to see a full size image.

Jump to features, detailed specs


BabelColor CT&A Main screen

   
Windows XP                                    Mac OS X

The main screen, with the Space #2 list box opened, and Custom space highlighted. The space selection list is identical for Space #1. The larger green color patch corresponds to Space #1, and the smaller pinkish color patch to Space #2. The color patches are converted from the selected RGB space to the default viewing environment (sRGB for Windows, Apple RGB for Mac OS 8 and 9, Apple RGB or sRGB for Mac OS X). For the Windows screen shown above, the Space #1 color patch is converted from Adobe (1998) to sRGB; the Space #2 color patch is converted from sRGB to sRGB (i.e. there is no translation). For the Mac screen shown above, the Space #1 color patch is converted from Adobe (1998) to Apple RGB; the Space #2 color patch is converted from Apple RGB to Apple RGB (i.e. there is no translation).    top


Spectral tools

   
Density tools                       Metamerism tools

       
RAL tool                  Graph tools                          Graph tools (saved image)

                           
ISO 3664+ (Illumination analysis)    ISO 3664+ (Monitor analysis)         ISO 12646 target

Click on a thumbnail for a full size image and descriptive text. To have a look at all Spectral tools, first click on the "Density tools" thumbnail, then select "Next screen" in the full view page that opens.    top


Compare Mac (Apple RGB) to Windows (sRGB)

The same RGB coordinates entered in Apple RGB (Mac default, on the LEFT side) and sRGB (Windows default, on the RIGHT side). The large, lighter colored, color patch shows what the color looks like on Macintosh display (even if this is a Windows XP screen; i.e. the color is properly translated from Apple RGB to sRGB for display purposes). You can see on the chromaticity diagram that the same RGB coordinates correspond to two different colors (i.e. they have different "xy" coordinates). In essence, the darker sRGB color patch shows how a color generated on a Mac will look on a Windows PC if it is not properly translated to the sRGB environment. The CIE94 color difference is 5,51, a very noticeable difference. The difference is mostly intensity (DeltaL* = -5,25), followed by chroma (i.e. saturation; DeltaC* = 3,91), and some hue difference (DeltaH* = 2,21).    top
 


Convert from ProPhoto RGB to Adobe (1998)

A color conversion from Space #2 to Space #1. The spaces have different primaries as well as different illuminants; still, BabelColor CT&A can determine the exact match. Notice that the CMC(2:1) D50 color difference is zero; since the illuminant is different, both spaces coordinates are converted to D50 in order to obtain a valid color difference value. In the chromaticity diagram, you will notice that the "xy" coordinates are different but this is expected since the illuminants are also different. BabelColor CT&A determines the equivalent color when viewed by the other space illuminant.    top
 


L*a*b* input

L*a*b* input in Adobe (1998), converted to sRGB. In this example, L*a*b* values had been determined relative to illuminant D65, but D50 values could also be used as input by first checking the "L*a*b* / L*u*v* in D50" radio button under the L*a*b* display (L*u*v* input is also possible). The color is outside of the sRGB gamut and clipping has occurred for the red coordinate; a red exclamation point ( ! ) appears over the corresponding display box of Space #2. The clipping error is 7,07 CIE94; the error can also be evaluated using the other formulas shown in the opened list box. There is another exclamation point ( ! ) in the larger color patch, indicating that the Space #1 color cannot be exactly represented in a Windows sRGB display (the red coordinate is clipped). Also show in Space #2 is the Munsell HVC equivalent of the converted color (2,2G 5,9/10,5).    top
 


Convert from a Munsell chip to a RGB Space

Munsell color chip 7,5G 7/6 (from the Munsell Color Deck) being converted to sRGB. We see that the selected chip, located in the middle of the list on the LEFT side, is well within the sRGB gamut, with a zero DeltaE*uv error; the matching sRGB value is (108, 191, 160).  To navigate within the Munsell Color Deck, we have used the List mode, where the color patches are presented in the order they are stored in the database. We could have also used the other deck navigating mode, the L*C*h* pad, shown in the next screenshot. Converting TO Munsell is available for any RGB color, as can be seen in the HVC data fields on the screenshot's right side; this conversion is computed with a precision of one decimal place.    top
 


Convert from a RGB Space to FED-STD-595B

R'G'B' input in Adobe (1998) converted to the FED-STD-595B Color Deck (we can also convert FROM FED-STD-595B). We see that there is not an exact match, and the closest chip is #14255, as represented by the square patch in the center of the L*C*h* pad, with a 2,40 CIE94 error. The patches around the center one show the NEXT best matches in terms of closeness in saturation (+/- sat., i.e. chroma), luminosity (+/- lum., i.e. lightness), and hue; their IDs can be obtained by resting the mouse cursor over the patch until a popup tag appears (as shown above for the + sat. patch).    top
 


Graphical data

Additional graphical data can be superimposed on the chromaticity diagram. The above image shows the position of the GretagMacbeth ColorChecker chart patches as computed for illuminant D65. Similar data for illuminants C and D50 can be shown as well as the gamut of SWOP coated.    top
 


Custom RGB space and illuminant

   

A custom RGB space can be defined by specifying the illuminant coordinates, the red, green and blue primaries, and the gamma function. A D-series or blackbody illuminant can be defined simply by entering the source temperature, in kelvin. Gamma can be defined by a single parameter or a two segment function with a slope for the linear portion, a transition, an offset, and a gamma value. You can also export all the custom data as well as the XYZ-to-RGB and RGB-to-XYZ matrices coefficients to a spreadsheet.  top
 


RGB Spaces data table

By consulting the menu-selectable data tables, the user can obtain information on the constants and parameters used internally by BabelColor CT&A to compute the displayed data. The table shown above contains the space's primaries, its illuminant, and the gamma parameters. Other tables are available for the illuminants' coordinates, the RGB to XYZ and XYZ to RGB conversion matrices, and for the Bradford matrices used to convert XYZ coordinates between different illuminants (i.e. chromatic adaptation).    top
 


Help doc

   
Windows XP                                Mac OS X

A complete help manual is provided. It contains a detailed description of the features and the interface, a thorough theoretical presentation, with all the equations, of the various conversion processes within BabelColor CT&A, and tutorials with an emphasis on practical uses. The Windows manual, the thumbnail on the left, is built in the HTML Help format; it is fully indexed and searchable. The Mac manual, the thumbnail on the right, is an hyper-linked PDF file; the file has an index, and is searchable. Both manuals can be printed.    top

 

Legal Information - Privacy Policy - About us - Press/Media
Copyright © 2003-2008 The BabelColor Company. All rights reserved.
Last modification : 28 July 2008