Vignetting can be corrected by brightening the corners of an image. Vignetting is the darkening of corners of an image due to light fall-off, and can be caused by optics (the lens itself), the sensor (many sensors are less sensitive to light that hits the sensor at an angle), or from other causes like a filter or lens hood that shades the corners of an image. CA distortion can be removed by adjusting the data for the colors that show the most distortion. Zoom lenses, particularly at their widest and longest focal lengths, exhibit the most severe distortion. The result is a color fringe (often appears purple) and uneven colors around edge details in high contrast scenes, such as branches of a tree silhouetted against a bright sky.
#COREL AFTERSHOT PRO#
Corel AfterShot Pro includes profiles for several hundred lens and camera combinations.Ĭhromatic Aberration distortion (known as CA distortion) is a result of the nonuniform bending of light as it passes through a lens. Each lens has its own Barrel and Pin Cushion characteristics, and by analyzing a set of images from a lens at all focal lengths, this distortion can be removed. Pin cushion distortion refers to a pinched or narrowed appearance at the sides of an image. Barrel distortion refers to a rounded effect in an image caused by diminished lens magnification towards the edges. This is caused from nonuniform magnification of the image from the outside of the image (perimeter) to the center. The following types of lens distortion can quickly and easily be corrected in Corel AfterShot Pro: Barrel and Pin Cushion distortion, Chromatic Aberration, and Vignetting.īarrel and Pin Cushion distortion is commonly referred to simply as lens distortion. While zoom lenses with a large range of focal lengths show the greatest lens distortion, even fixed-focal length, or "prime" lenses, can cause some types of distortion. Note: Applying RAW Noise enables RAW Impulse Noise Removal, but you can apply RAW Impulse Noise Removal without enabling RAW Noise.
Threshold - sets the level of sensitivity for noise detection in the image.
The feature can be applied only to RAW files. RAW Noise is an image improvement process that you can use very early in the image editing workflow to provide the highest quality final images. *Available only in Corel AfterShot Pro prior to version 1.1.1.x. Note : Fine-detailed control tools, like Sharpening, should be applied and evaluated while looking at the image at the 100% zoom level, either in the Preview panel or with the Magnifier If sharpening your image makes noise or highly detailed areas too distracting or too sharp, then try raising the Sensitivity value. Amount adjusts the overall sharpness, while Sensitivity limits what portions of your image are sharpened.Ī high Sensitivity value results in less of your image being sharpened.
The Sharpening section lets you adjust how sharp or how soft the details are in your image. The Detail tab on the Tools panel lets you access controls that let you sharpen, blur, adjust noise, apply lens corrections or distortions, and add effects, such as vignette or color inversion.
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