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I use the word could here because you need to know that each colordevice, each film, scanner, monitor, or printer, has its own color gamut. In its purest form, this IT8 targetconsists of a group of many color swatches, light wavelength descriptions,covering a large range of colors that the human eye can see, as well as variousfilms could capture, scanners could scan, monitors could display, and printerscould print. To do this, people have developed test target systems, like the IT8color target from the CIE, to measure color. We want to be able tomeasure the colors that a particular film can record, that a particular scannercan scan, that a particular monitor can display, and that a particular printercan print. Adevice called a spectrophotometer does this best, and we will be talking abouthow a spectrophotometer, along with various color calibration software, worktogether to improve our use and accuracy of digital color. To measure color, we need to be able to measure wavelengths of light. Some of the step-by-step examples in this book use the Lab colorspace.įigure 14.3 Wavelengths of light the eye can see.įigure 14.4 A CIE chromaticity diagram showing the Lab colorspace. Using the Lab color space, youcan potentially be working with all the colors the eye can see however, the eyecan actually see more colors than most of the cameras and printers we work withcan reproduce. When you are working on a project using the Lab color space,you won't be throwing out colors that the eye can see and you won't beworking with any colors that the eye cannot see. This CIE xychromaticity diagram is useful for plotting other color gamuts and comparing oneagainst the other. The second tool is the CIE xy chromaticity diagram that shows these colorson an xy graph again representing the colors the human eye can see. Hunt, Fifth Edition, 1995 by FountainPress.) One of these tools is the Lab color space, that Photoshop supports,which consists of a color gamut of this range of colors that the human eye cansee. (Note: to learn a lotmore about the CIE and color history and theory, I'd recommend TheReproduction of Color by Dr. Without filling inall the details here, this description has evolved into two very useful tools wewill use in this book for measuring and quantifying color. In the1930s, an organization called the CIE (Commission Internationale del'Eclairage) did a bunch of scientific measurements with human observers todevelop a description of the colors the human eye could see. A color space is adescription of a range of colors to be used for a particular purpose. The color gamut of the humaneye is described in a color space called Lab color. Aparticular range of colors is called a color gamut. There are also wavelengths of light that our eyes can't see. Positive Film: ~ 8.There is a very large range of colors, wavelengths of light, that the humaneye can see. Negative Film: ~ 8.0 seconds (Multi-Sampling ON)
#It8 target film for mac os
This driver is not available for Mac OS as no driver is needed to use the scanner other than Silverfast Software. Please Note (Mac Users): The scanner's front buttons require a Plustek proprietary driver to launch shortcuts for IntelliScan & QuickScan software. In addition to SilverFast, the scanner comes with Presto PageManager 7.23.
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This updated version features an improved user interface and provides an advanced preview option that lets you see the results of adjustments beforehand. The included SilverFast 8 works together with the scanner to improve your workflow and ensure proper results the first time. Additionally, the included IT 8 calibration slide ensures accurate color results the first time, reducing the need for repeated scans or extensive post processing color correction. The scanner's built-in infrared channel provides dust and scratch removal. The Plustek OpticFilm 8200i Ai Film Scanner uses a high resolution 7200dpi sensor with 48-bit color depth to capture all the detail from your originals.