tailieunhanh - Tài liệu Photoshop cs5 by Dayley part 9

Các định dạng tập tin Cineon được phát triển bởi Kodak để chứa dữ liệu từ hình ảnh quét từ phim. Các định dạng Cineon là một chút khác nhau từ các định dạng chuẩn như JPEG và TIFF. Thay vì đại diện cho kênh RGB cường độ của màu sắc, các dữ liệu pixel ở định dạng Cineon đại diện cho mật độ in ấn theo nhận định của bộ phim in. Mục đích của việc sử dụng mật độ in ấn là để giữ lại các giá trị ban đầu tồn tại trên các bộ phim in | Chapter 3 Image Basics Cineon The Cineon file format was developed by Kodak to contain data from images scanned in from film. The Cineon format is a bit different from the standard formats such as JPEG and TIFF. Instead of RGB channels representing intensity of color the pixel data in the Cineon format represents the printing density as seen by the print film. The purpose of using the printing density is to retain the values that originally existed on the print film. IFF .IFF .TDI The IFF Interchange File Format was developed by Electronic Arts as a method to transfer graphic data between software. It is unlikely that you will come across the need to use an IFF but if you do Photoshop can open it. Scitex CT .SCT The Scitex CT file format is used by Scitex Corporation Ltd. graphics processing equipment. This file format is usually used only if you are sending print jobs to a Scitex digital printer. Targa .TGA .VDA .ICB .VST The Targa Truevision Advanced Raster Graphics Adapter file format has been around since the birth of color displays in computers. Targa files support 8 16 24 and 32-bit colors per pixel. Targa files support alpha channel data and are fairly transportable between systems. A common use of Targa files is to store textures used in 3D imaging such as video games or animation. Radiance .HDR .RGBE .XYZE The Radiance format stores four bytes per pixel red green blue and an exponent byte . This allows pixels to have the extended range and precision similar to floating point values allowing the HDR and RBGE formats to handle very bright pixels without loss of precision for darker ones. A variant of the Radiance format XYZE uses the XYZ color model discussed in Chapter 29 instead of RGB. Video files With the addition of the Timeline palette Photoshop adds several video file formats to the huge list of supported file formats. Not only can you import movies with the following extensions you can import image sequences with the usual image extensions that .