tailieunhanh - Adobe Photoshop CS2 Photographers’ Guide phần 10

Histogram Palette Một bảng mới trong Photoshop mà cho phép thực hiện thay đổi các giá trị âm bằng cách sử dụng điều khiển mà điều chỉnh màu xám trắng, giữa, và các điểm đen của hình ảnh. Không giống như các biểu đồ đi kèm với lệnh Levels Photoshop, bảng này có sẵn để sử dụng ngay cả khi bạn đang sử dụng các công cụ khác. | Appendix Illustrated Glossary 331 for each brightness level. A histogram chart typically looks like a curve with one or more slopes and peaks depending on how many highlight midtone and shadow tones are present in the image. Histogram Palette A new palette in Photoshop that allows making changes in tonal values using controls that adjust the white middle gray and black points of an image. Unlike the histogram included with Photoshop s Levels command this palette is available for use even when you re using other tools. hue The color of light that is reflected from an opaque object or transmitted through a transparent one. image rotation A feature found in some digital cameras which senses whether a picture was taken in horizontal or vertical orientation. That information is embedded in the picture file so that the camera and compatible software applications automatically can display the image in the correct orientation. incident light Light falling on a surface. indexed color image An image with 256 different colors as opposed to a grayscale image which has 256 different shades of the tones between black and white. infinity A distance so great that any object at that distance will be reproduced sharply if the lens is focused at the infinity position. interchangeable lens Lens designed to be readily attached to and detached from a camera a feature found in more sophisticated digital cameras. International Standards Organization ISO A governing body that provides standards used to represent film speed or the equivalent sensitivity of a digital camera s sensor. Digital camera sensitivity is expressed in ISO settings. interpolation A technique digital cameras scanners and image editors use to create new pixels required whenever you resize or change the resolution of an image based on the values of surrounding pixels. Devices such as scanners and digital cameras can also use interpolation to create pixels in addition to those actually captured thereby increasing the .

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