Cor­rect per­spec­tive dis­tor­tion

Mas­ter the Straighten and Per­spec­tive Con­trol panel

NPhoto - - Niko Pe­dia -

Con­verg ing ver­tica ls When snap­ping this shot of Smail­holm Tower in the Scot­tish Borders (left), we failed to cap­ture truly ver­ti­cal lines. As the tower looms above us from its hilly van­tage point, the walls ap­pear to lean in­wards as they rise. These con­verg­ing ver­ti­cals are caused by per­spec­tive dis­tor­tion. The cam­era was also ro­tated slightly, cre­at­ing a tilted hori­zon. Se nsor spots If you swap your lens around of­ten then par­ti­cles of dust can stick to the sen­sor, caus­ing unwanted smudged spots to ap­pear in pho­tos. In this shot they’re par­tic­u­larly vis­i­ble in the sky. An im­age with sen­sor spots is likely to be re­jected when it’s sub­mit­ted for sale as stock. For­tu­nately, Cap­ture NX-D’s Re­touch Brush can re­place sen­sor spots with clear patches of sky in just a few clicks (see the walk­through be­low). Stra ighten and Per spec tive Con­trol Click on this icon to sum­mon forth the Straighten and Per­spec­tive Con­trol panel. This panel will ap­pear be­low the Edit panel in a scrol­lable win­dow. You can click on the fly-out icon at the top-right of the panel to un­dock it and then drag it any­where in the workspace. Stra ighten tool Click here to sum­mon the Straighten tool. You can then click and drag the tool to sit on a tilted line. Like a ruler, this will mea­sure the an­gle of the tilted line and then ro­tate the im­age so that it runs par­al­lel with the edge of the frame. It can straighten tilted ver­ti­cal lines as well as hor­i­zon­tal ones. Stra ighten slider Drag this slider left and right to ro­tate the shot man­u­ally. This helps you to straighten tilted hori­zons or make a ver­ti­cal wall run par­al­lel with the edge of the frame. When you use the Straighten tool to mea­sure a tilted line, this slider will au­to­mat­i­cally ad­just to coun­ter­act the tilt. We used a 1.2 in­cre­ment, which en­sured that the tower’s left wall was per­pen­dic­u­lar to the ground. Area s with­out data When you ro­tate a shot, you also change its com­po­si­tion. If you tick the ‘In­clude ar­eas with­out im­age data’ box, Cap­ture NX-D will add ex­tra ar­eas of black to the edge of a ro­tated frame to pre­serve its con­tents. You can then man­u­ally crop out these black edges with the Crop tool. If you leave this box unticked then Cap­ture will au­to­mat­i­cally crop the shot as it is ro­tated to lose any black edges. Ver­tica l cor­rec tion This slider coun­ter­acts any ver­ti­cal per­spec­tive dis­tor­tion. In this case we wanted the walls of the tower to run more par­al­lel with the edge of the frame, giv­ing the ar­chi­tec­tural struc­ture a more sta­ble and bal­anced look. Hor­i­zon­tal cor­rec tion Use this slider to cor­rect lines that con­verge hor­i­zon­tally. You’re less likely to need to use this op­tion.

Newspapers in English

Newspapers from Australia

© PressReader. All rights reserved.