Apple ColorSync Display Manuel d'utilisateur télécharger pdf

Using the HP DreamColor LP2480zx

Display with Apple Mac Systems

The HP DreamColor LP2480zx professional display provides an extremely wide color gamut and a

highly accurate color performance that exceeds that available with most other LCD displays. But

instead of merely presenting this wide gamut to the user, this display has the ability to emulate five

specific color spaces that are contained within its color gamut:

 sRGB (used in general purpose computing, web-focused imagery, and consumer photography)

 AdobeRGB (used in professional photography)

 DCI P3 (used in digital cinema production and post-production)

 Rec.709 (used in high definition video production and post-production)

 Rec.601 (used in standard definition video production and post-production)

In addition, the display provides a Full color space which utilizes the display’s full native gamut and a

User color space which can be can be used to create a custom color space. All color spaces can be

customized by the user including the ability to modify the color primaries, white point, luminance, and

gamma (tone response). The display can be switched on-the-fly between all of these color spaces and

the user can interactively modify a color space as desired.

The display’s ability to either switch color spaces or modify an existing color space on-the-fly presents

a challenge to both the Mac OS and Windows operating systems as they were not designed to

support this capability. As a result, some manual interaction is required at the operating system level

when switching color spaces.

In addition, assumptions made by current versions of the Mac OS regarding gamma can lead to

reduced performance and must be manually compensated for to get the full performance out of the

display. This white paper is designed to explain these issues and provide suggested workflows to get

the most out the HP DreamColor LP2480zx display.

ColorSync Profile Creation

When a display is first connected to the Mac, the OS will use ColorSync to read the display’s EDID

(Extended Display Identification Data) information and generate an .icc display profile. This profile

includes many items including a unique device identifier and the device’s color primaries, white point

(or color temperature) and gamma. It is important to recognize that the profile can include not only

the device’s native primaries, white point, and gamma, but also a desired set of values. If these

values are included the host graphics system must use a look up table (LUT) to translate between the

desired values and the display’s native values.

Current versions of the Mac OS add the desired values of a 6500 Kelvin white point (also known as

) and a gamma of 1.8 to all .icc display profiles. The rationale for inserting and utilizing these

values instead of native values is to provide a consistent display experience regardless of the display

connected to the system. While this behavior certainly simplifies life for the user, setting all displays to

the same effective response (gamma) and white point can result in the display having a noticeably

poorer accuracy than could otherwise be provided. This is especially for LCD displays.

As compared to other LCD displays (which use fluorescent or white LED back or side lighting), the HP

DreamColor LP2480zx uses an RGB LED backlight which allows it to use not only a D

white point,

but to adjust the individual LED’s intensity to provide a different white point when working in either a

pre-press or digital cinema environment. For example, the pre-press industry prefers a 5000 Kelvin

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Résumé du contenu

Page 1 - ColorSync Profile Creation

Using the HP DreamColor LP2480zx Display with Apple Mac Systems The HP DreamColor LP2480zx professional display provides an extremely wide color gamu

Page 2 - Application and Usage

Using the HP DreamColor LP2480zx Display with Apple Mac Systems 2 (D50) white point. Assuming a D65 white point will often result in an inaccurate re

Page 3

Using the HP DreamColor LP2480zx Display with Apple Mac Systems 3 6. On the Introduction page, enable the Expert Mode checkbox and press the Continu

Page 4

Using the HP DreamColor LP2480zx Display with Apple Mac Systems 4 Though using the Mac OS default option may become more viable with the release of S

Page 5 - Mac OS Color Management

Using the HP DreamColor LP2480zx Display with Apple Mac Systems 5 To enable the LP2480zx’s Hot Plug Detect Support option: 1. Press any button on th

Page 6

Using the HP DreamColor LP2480zx Display with Apple Mac Systems 6 2. Select Displays in the Hardware group. 3. Select Arrangement from the Tab opti

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Apple ColorSync Display Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Téléviseurs et moniteurs Apple ColorSync Display. Using the HP DreamColor LP2480zx Display with Apple Mac Systems Manuel d'utilisatio

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