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Photoshop cs5 by steve Johnson part 25

Làm việc với Lens Correction Filter Các ống kính lọc chỉnh sửa sai sót xảy ra trong quá trình chụp ảnh, chẳng hạn như sự biến dạng hình học, hình minh họa, và quang sai màu. Gây biến dạng hình học đường thẳng để cung ra đối với các cạnh của hình ảnh. Kỹ thuật này được một khiếm khuyết nơi các cạnh của một hình ảnh được tối hơn trung tâm. | Working with the Lens Correction Filter The Lens Correction filter fixes flaws that occur during the shooting of images such as geometric distortion vignetting and chromatic aberration. Geometric distortion causes straight lines to bow out toward the edges of the image. Vignetting is a defect where edges of an image are darker than the center. Chromatic aberration appears as a fringe of color along the edges of objects caused by the lens focusing on different colors of light in different planes. You can select options to automatically correct image problems or apply a Lens Correction Profile LCP for a camera New . If a profile for your camera is not available you can search online or use Adobe Lens Profile Creator New available at www.labs.adobe.com to create one. If you know how you want to fix a problem you can also manually adjust options to correct it New . Use the Lens Correction Filter Open an image. Click the Filter menu and then click Lens Correction. Select from the following tools Remove Distortion Tool. Drag in the grid left or right to remove geometric distortion. Straighten Tool. Drag in the grid to draw a new horizon line image shifts to the horizon . Move Grid Tool. Drag to reposition the visible grid. Hand Tool. Drag to move the image within the view window. Zoom Tool. Click in the view window to zoom in or Alt click Win or Option click Mac to zoom out. Select from the following options on the Auto Correction tab New Correction. Select to correct Geometric Distortion Chromatic Aberration or Vignette New . Edge. Select to fill in transparent areas of the image with the Black or White Color New Edge Extension or Transparent. Search Criteria and Lens Profile. Search for and select a lens profile to correct an image based on a camera and lens or click Search Online New . 156 Chapter 7 Click the Custom tab. Select from the following tools Settings. Choose from Lens Default Previous Correction Custom or Default Correction. Remove Distortion. Drag the .