Correct Perspective Distortion in Photoshop When Photographing Art From the Side

Barrel baloney is a lens defect that causes straight lines to bow out toward the edges of the image. Pincushion baloney is the contrary outcome, where direct lines curve in.

Vignetting is a defect that darkens the corners of an prototype due to calorie-free falloff around the perimeter of the lens. Chromatic aberration appears as a color fringe along the edges of objects, caused by the lens focusing on different colors of light in unlike planes.

Some lenses showroom unlike defects at certain focal lengths, f‑stops, and focus distances. With the Lens Correction filter, yous can specify the combination of settings used to make the image.

Correct lens distortion and conform perspective

The Lens Correction filter fixes common lens flaws such every bit barrel and pincushion baloney, vignetting, and chromatic aberration. The filter works simply with viii‑ and 16‑bit-per-channel images in RGB or Grayscale manner.

You can also use the filter to rotate an prototype or set image perspective acquired by vertical or horizontal photographic camera tilt. The filter's image grid makes these adjustments easier and more than accurate than using the Transform control.

Automatically right epitome perspective and lens flaws

Using lens profiles, the default Car Correction pick quickly and accurately fixes baloney. For proper automatic correction, Photoshop requires Exif metadata that identifies the camera and lens that created the image, and a matching lens profile on your system.

Manually correct image perspective and lens flaws

Yous tin use manual correction alone or use information technology to refine automatic lens correction.

Adjust the Lens Correction preview and filigree

Adjust the preview magnification and grid lines to ameliorate judge the necessary amount of correction.

Save settings and set camera and lens defaults

You can salve the settings in the Lens Correction dialog box to reuse with other images fabricated with the same camera, lens, and focal length. Photoshop saves both Car Correction settings and Custom settings for distortion, chromatic aberration, and vignetting. Perspective correction settings are not saved because they typically vary from one image to another.

You tin relieve and reuse settings in two ways:

• Manually save and load settings. Set options in the dialog box, and then choose Save Settings from the Settings bill of fare . To utilize the saved settings, cull them from the Settings menu. (If you salve settings outside the default folder, they don't appear in the menu; use the Load Settings command to admission them.)

• Gear up a lens default. If your image has EXIF metadata for the camera, lens, focal length, and f‑cease, you lot can save the current settings as a lens default. To save the settings, click the Fix Lens Default button. When you right an image that matches the camera, lens, focal length, and f‑stop, the Lens Default option becomes available in the Settings menu. This option is non available if your paradigm doesn't have EXIF metadata.

Reduce image noise and JPEG artifacts

Image dissonance appears every bit random extraneous pixels that aren't part of the paradigm item. Noise tin can exist acquired past photographing with a high ISO setting on a digital camera, underexposure, or shooting in a dark area with a long shutter speed. Depression‑end consumer cameras commonly exhibit more than prototype dissonance than high‑end cameras. Scanned images may accept image dissonance caused by the scanning sensor. Often, the flick's grain pattern appears in the scanned prototype.

Image racket can appear in two forms: luminance (grayscale) noise, which makes an image look grainy or patchy, and color racket, which is normally visible as colored artifacts in the image.

Luminance noise may be more pronounced in one aqueduct of the prototype, unremarkably the blue aqueduct. Yous can accommodate the racket for each channel separately in Advanced mode. Earlier opening the filter, examine each channel in your paradigm separately to see if noise is prevalent in one channel. You preserve more image particular by correcting i channel rather than making an overall correction to all channels.

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Source: https://helpx.adobe.com/photoshop/using/correcting-image-distortion-noise.html

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