TAILIEUCHUNG - Photoshop cs5 by steve Johnson part 13

Làm chủ các công nghệ đến lựa chọn Làm chủ Adobe Photoshop đòi hỏi kỹ năng trong nhiều lĩnh vực đa dạng. Trong khi thay đổi màu sắc của hình ảnh, nâng cao một bức ảnh cũ, hoặc loại bỏ bụi bẩn và trầy xước có thể yêu cầu các kỹ năng khác nhau, họ có một lựa chọn phổ biến sợi. | Mastering the Art of Selection 4 Introduction Mastering Adobe Photoshop requires skill in many diverse areas. While modifying an image s color enhancing an old photograph or removing dust and scratches may require different skills they have one common thread selection. Without a selection any changes you apply are made to the whole image. For example if you choose to paint a black stroke you would select the Paintbrush tool choose the color black and begin painting. Photoshop will let you apply black paint to any and all portions of the image. Selections are your way to instruct Photoshop what portions of the active document you want to change and which you want to protect from change. The Marquee tools are considered Photoshop s good old selection tools. In fact they ve been a part of Photoshop since the early days. Where the marquee tools let you select areas of an image in a structured way using squares circles lines the lasso tools add a bit of freeform selection to the mix. Lasso tools require a certain amount of hand eye coordination. For example you can use the lasso tool to create a customized selection area around just about any object in a document be it an animal vegetable or mineral. It just requires a good eye a steady hand and a really big mouse pad I hate it when I run out of mouse pad . Creating a selection lets you influence a specific area of the image. For example If you are changing the color of a car from red to blue this is where making a selection really shines. When you select an area of a Photoshop document the selection becomes the work area filters adjustments and brushes will only work within the selection boundary. Since selection is such an important aspect of controlling what happens in a document Photoshop gives you many ways to create your desired selection. Mastering the art of selection gives you control over not just what you do but where you do it. What You ll Do Use the Rectangular Marquee Tool Use the Elliptical Marquee Tool .

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