# Blur Filters Apply blurs, simulate motion and zoom effects, reduce noise, and erode and dilate image regions. ## Topics ### Filters [`+ bokehBlurFilter`](/documentation/CoreImage/CIFilter-swift.class/bokehBlur()) Applies a bokeh effect to an image. [`+ boxBlurFilter`](/documentation/CoreImage/CIFilter-swift.class/boxBlur()) Applies a square-shaped blur to an area of an image. [`+ discBlurFilter`](/documentation/CoreImage/CIFilter-swift.class/discBlur()) Applies a circle-shaped blur to an area of an image. [`+ gaussianBlurFilter`](/documentation/CoreImage/CIFilter-swift.class/gaussianBlur()) Blurs an image with a Gaussian distribution pattern. [`+ maskedVariableBlurFilter`](/documentation/CoreImage/CIFilter-swift.class/maskedVariableBlur()) Blurs a specified portion of an image. [`+ medianFilter`](/documentation/CoreImage/CIFilter-swift.class/median()) Calculates the median of an image to refine detail. [`+ morphologyGradientFilter`](/documentation/CoreImage/CIFilter-swift.class/morphologyGradient()) Detects and highlights edges of objects. [`+ morphologyMaximumFilter`](/documentation/CoreImage/CIFilter-swift.class/morphologyMaximum()) Blurs a circular area by enlarging contrasting pixels. [`+ morphologyMinimumFilter`](/documentation/CoreImage/CIFilter-swift.class/morphologyMinimum()) Blurs a circular area by reducing contrasting pixels. [`+ morphologyRectangleMaximumFilter`](/documentation/CoreImage/CIFilter-swift.class/morphologyRectangleMaximum()) Blurs a rectangular area by enlarging contrasting pixels. [`+ morphologyRectangleMinimumFilter`](/documentation/CoreImage/CIFilter-swift.class/morphologyRectangleMinimum()) Blurs a rectangular area by reducing contrasting pixels. [`+ motionBlurFilter`](/documentation/CoreImage/CIFilter-swift.class/motionBlur()) Creates motion blur on an image. [`+ noiseReductionFilter`](/documentation/CoreImage/CIFilter-swift.class/noiseReduction()) Reduces noise by sharpening the edges of objects. [`+ zoomBlurFilter`](/documentation/CoreImage/CIFilter-swift.class/zoomBlur()) Creates a zoom blur centered around a single point on the image. ### Protocols [`CIBokehBlur`](/documentation/CoreImage/CIBokehBlur) The properties you use to configure a bokeh blur filter. [`CIBoxBlur`](/documentation/CoreImage/CIBoxBlur) The properties you use to configure a box blur filter. [`CIDiscBlur`](/documentation/CoreImage/CIDiscBlur) The properties you use to configure a disc blur filter. [`CIGaussianBlur`](/documentation/CoreImage/CIGaussianBlur) The properties you use to configure a Gaussian blur filter. [`CIMaskedVariableBlur`](/documentation/CoreImage/CIMaskedVariableBlur) The properties you use to configure a masked variable blur filter. [`CIMedian`](/documentation/CoreImage/CIMedian) The properties you use to configure a median filter. [`CIMorphologyGradient`](/documentation/CoreImage/CIMorphologyGradient) The properties you use to configure a morphology gradient filter. [`CIMorphologyMaximum`](/documentation/CoreImage/CIMorphologyMaximum) The properties you use to configure a morphology maximum filter. [`CIMorphologyMinimum`](/documentation/CoreImage/CIMorphologyMinimum) The properties you use to configure a morphology minimum filter. [`CIMorphologyRectangleMaximum`](/documentation/CoreImage/CIMorphologyRectangleMaximum) The properties you use to configure a morphology rectangle maximum filter. [`CIMorphologyRectangleMinimum`](/documentation/CoreImage/CIMorphologyRectangleMinimum) The properties you use to configure a morphology rectangle minimum filter. [`CIMotionBlur`](/documentation/CoreImage/CIMotionBlur) The properties you use to configure a motion blur filter. [`CINoiseReduction`](/documentation/CoreImage/CINoiseReduction) The properties you use to configure a noise reduction filter. [`CIZoomBlur`](/documentation/CoreImage/CIZoomBlur) The properties you use to configure a zoom blur filter. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)