tailieunhanh - Adobe Photoshop CS2 Photographers’ Guide phần 2

Đó là nơi mà Photoshop. Bạn có thể thực hiện một số điều chỉnh hợp lý để các quan điểm của một hình ảnh trong trình soạn thảo hình ảnh của bạn. Thông thường, các thao tác là đủ toàn bộ hoặc một phần chính xác cho sự biến dạng quan điểm. Có bốn phương pháp bạn có thể sử dụng trong Photoshop CS2, và chúng tôi sẽ xem xét tất cả chúng. | Chapter 2 Camera and Lens Effects in Photoshop 19 That s where Photoshop comes in. You can make some reasonable adjustments to the perspective of an image within your image editor. Often the manipulations are enough to fully or partially correct for perspective distortion. There are four methods you can use in Photoshop CS2 and we ll look at all of them. No-Brainer Correction with the Grid This section explains a basic perspective correction method you can use to fix a selection in your photo using Photoshop s Grid as an aid. The procedure assumes that your image is oriented correctly that is it doesn t need to be rotated . Just follow these steps using the original image from the Course website downloads or use an image of your own. 1. Open the file in Photoshop. The image will look like the one shown in Figure . Figure This arch appears to be falling backwards because the camera was tilted up to shoot the picture. 2. To give yourself a little working space choose Image Canvas Size and change the width of the image to 1500 pixels and the height to 2500 pixels. 3. Choose View Fit on Screen or press Ctrl Command O to allow the enlarged image to fit comfortably on your screen. 20 Adobe Photoshop CS2 Photographers Guide 4. Choose View Show Grid or press Ctrl Command apostrophe to turn on display of Photoshop s grid overlay on your image as shown in Figure . Figure The Grid helps line up your image as you change its perspective. 5. If your grid s squares are too large use Edit Preferences Grid Guides Slices to define a grid layout. I chose one line every 200 pixels for this project. 6. Use the Rectangular Marquee tool to select only the image of the arch not the blank space you created around it. 7. Choose Image Transform Perspective to activate Photoshop s Distortion feature. 8. Drag the corner selection handles until the lines of the arch are lined up with the grid. 9. Crop the image to arrive at the final

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