tailieunhanh - ADOBE PHOTOSHOP FOR UNDERWATER PHOTOGRAPHERS- P5

ADOBE PHOTOSHOP FOR UNDERWATER PHOTOGRAPHERS- P5: In a matter of a few short years, the underwater digital camera went from a novelty item to the predominant method for taking underwater pictures. Never before has a technology advanced so rapidly. Thanks to digital, though, underwater photography has evolved into a shootto- edit process. | Above Original digital camera image of feather duster worms in the Cayman Islands. Left The Layers menu shows the Background image at the bottom High Pass filter in the middle and the Dust Scratches layer at the top. 90 ADOBE PHOTOSHOP FOR UNDERWATER PHOTOGRAPHERS Top Enlarged section before any layer editing is added. Center Enlarged section after the High Pass layer was added. Note that the backscatter in the background was unaffected by the High Pass filter because of the mask and the resulting image is unacceptable. Bottom The water background was copied and pasted as a new layer. Then the Dust Scratches filter was applied to remove the backscatter. O Layer Controls No matter which method you use to sharpen your image the Unsharp Mask Smart Sharpen High Pass filter or maybe a third-party plug-in see chapter 15 you should always apply the sharpening effect to a copy Ctrl Cmd J of the Background layer. You can then use the Opacity slider to increase or decrease the effect by controlling how much the original underlying Background layer shows through the duplicated later. You can also use more than a dozen different blending modes on your sharpening layer. Before you scan through the different layer blending modes make sure you have the Move tool selected from the toolbox. You can then hold the Shift key and use the or - keys to move up and down through the layer blending modes. You can also use either the numeric keypad or the Opacity slider to change the opacity percentage. Add a Mask. You can also add a mask to your sharpening layer and then use the black brush to selectively remove the sharpening effect. By adjusting the opacity setting of the brush you can control the sharpening removal. The blending mode and opacity setting for the Brush tool are found at the top of the editing screen. ADVANCED SHARPENING TECHNIQUES 91 9. WORKING WITH RAW FILES As the digital camera became the norm photographers especially those using DSLRs were introduced to the RAW file .