如何获取CIFilter类中的过滤器名称列表？

Question

我使用以下代码进行曝光调整及其工作.我需要用于锐化,去噪,高光,色温,阴影,模糊等的滤镜名称.

[CIFilter filterWithName: @"CIExposureAdjust"
                      keysAndValues: @"inputImage", [_imageView image], nil];

Answer 1

我写信给你之前的所有过滤器的帖子链接.我将重复:链接到所有过滤器.

例如,你需要模糊效果.模糊是类别,有7个过滤器:

• CIBoxBlur
• CIDiscBlur
• CIGaussianBlur
• CIMedianFilter
• CIMotionBlur
• CINoiseReduction
• CIZoomBlur.

等等..

Answer 2

您需要做的就是询问CIFilter过滤器名称.然后,您可以向每个过滤器询问它attributes,它返回一个字典,该字典描述过滤器接受的每个输入和输出参数.

NSArray* filters = [CIFilter filterNamesInCategories:nil];
for (NSString* filterName in filters)
{
    NSLog(@"Filter: %@", filterName);
    NSLog(@"Parameters: %@", [[CIFilter filterWithName:filterName] attributes]);
}

例如,这是CIZoomBlur过滤器的上述代码的输出:

Filter: CIZoomBlur
Parameters: {
    CIAttributeDescription = "Simulates the effect of zooming the camera while capturing the image.";
    CIAttributeFilterCategories =     (
        CICategoryBlur,
        CICategoryVideo,
        CICategoryStillImage,
        CICategoryBuiltIn
    );
    CIAttributeFilterDisplayName = "Zoom Blur";
    CIAttributeFilterName = CIZoomBlur;
    CIAttributeReferenceDocumentation = "http://developer.apple.com/cgi-bin/apple_ref.cgi?apple_ref=//apple_ref/doc/filter/ci/CIZoomBlur";
    inputAmount =     {
        CIAttributeClass = NSNumber;
        CIAttributeDefault = 20;
        CIAttributeDescription = "The zoom-in amount. Larger values result in more zooming in.";
        CIAttributeDisplayName = Amount;
        CIAttributeIdentity = 0;
        CIAttributeMin = 0;
        CIAttributeSliderMax = 200;
        CIAttributeSliderMin = 0;
        CIAttributeType = CIAttributeTypeDistance;
        CIUIParameterSet = CIUISetBasic;
    };
    inputCenter =     {
        CIAttributeClass = CIVector;
        CIAttributeDefault = "[150 150]";
        CIAttributeDescription = "The x and y position to use as the center of the effect.";
        CIAttributeDisplayName = Center;
        CIAttributeType = CIAttributeTypePosition;
        CIUIParameterSet = CIUISetBasic;
    };
    inputImage =     {
        CIAttributeClass = CIImage;
        CIAttributeDescription = "The image to use as an input image. For filters that also use a background image, this is the foreground image.";
        CIAttributeDisplayName = Image;
        CIUIParameterSet = CIUISetBasic;
    };
    outputImage =     {
        CIAttributeClass = CIImage;
    };
}

但是,大多数情况下,您可能只是使用文档.

Answer 3

我找到了CIFilter类中的名称列表,核心图像过滤器.这是CIFilter中的链接名称和过滤器列表.

过滤器

CICategoryBlur
CIBoxBlur
CIDiscBlur
CIGaussianBlur
CIMaskedVariableBlur
CIMedianFilter
CIMotionBlur
CINoiseReduction

CICategoryColorAdjustment
CIColorClamp
CIColorControls
CIColorMatrix
CIColorPolynomial
CIExposureAdjust
CIGammaAdjust
CIHueAdjust
CILinearToSRGBToneCurve
CISRGBToneCurveToLinear
CITemperatureAndTint
CIToneCurve
CIVibrance
CIWhitePointAdjust

CICategoryColorEffect
CIColorCrossPolynomial
CIColorCube
CIColorCubeWithColorSpace
CIColorInvert
CIColorMap
CIColorMonochrome
CIColorPosterize
CIFalseColor
CIMaskToAlpha
CIMaximumComponent
CIMinimumComponent
CIPhotoEffectChrome
CIPhotoEffectFade
CIPhotoEffectInstant
CIPhotoEffectMono
CIPhotoEffectNoir
CIPhotoEffectProcess
CIPhotoEffectTonal
CIPhotoEffectTransfer
CISepiaTone
CIVignette
CIVignetteEffect

CICategoryCompositeOperation
CIAdditionCompositing
CIColorBlendMode
CIColorBurnBlendMode
CIColorDodgeBlendMode
CIDarkenBlendMode
CIDifferenceBlendMode
CIDivideBlendMode
CIExclusionBlendMode
CIHardLightBlendMode
CIHueBlendMode
CILightenBlendMode
CILinearBurnBlendMode
CILinearDodgeBlendMode
CILuminosityBlendMode
CIMaximumCompositing
CIMinimumCompositing
CIMultiplyBlendMode
CIMultiplyCompositing
CIOverlayBlendMode
CIPinLightBlendMode
CISaturationBlendMode
CIScreenBlendMode
CISoftLightBlendMode
CISourceAtopCompositing
CISourceInCompositing
CISourceOutCompositing
CISourceOverCompositing
CISubtractBlendMode

CICategoryDistortionEffect
CIBumpDistortion
CIBumpDistortionLinear
CICircleSplashDistortion
CICircularWrap
CIDroste
CIDisplacementDistortion
CIGlassDistortion
CIGlassLozenge
CIHoleDistortion
CILightTunnel
CIPinchDistortion
CIStretchCrop
CITorusLensDistortion
CITwirlDistortion
CIVortexDistortion

CICategoryGenerator
CIAztecCodeGenerator
CICheckerboardGenerator
CICode128BarcodeGenerator
CIConstantColorGenerator
CILenticularHaloGenerator
CIPDF417BarcodeGenerator
CIQRCodeGenerator
CIRandomGenerator
CIStarShineGenerator
CIStripesGenerator
CISunbeamsGenerator

CICategoryGeometryAdjustment
CIAffineTransform
CICrop
CILanczosScaleTransform
CIPerspectiveCorrection
CIPerspectiveTransform
CIPerspectiveTransformWithExtent
CIStraightenFilter

CICategoryGradient
CIGaussianGradient
CILinearGradient
CIRadialGradient
CISmoothLinearGradient

CICategoryHalftoneEffect
CICircularScreen
CICMYKHalftone
CIDotScreen
CIHatchedScreen
CILineScreen

CICategoryReduction
CIAreaAverage
CIAreaHistogram
CIRowAverage
CIColumnAverage
CIHistogramDisplayFilter
CIAreaMaximum
CIAreaMinimum
CIAreaMaximumAlpha
CIAreaMinimumAlpha

CICategorySharpen
CISharpenLuminance
CIUnsharpMask

CICategoryStylize
CIBlendWithAlphaMask
CIBlendWithMask
CIBloom
CIComicEffect
CIConvolution3X3
CIConvolution5X5
CIConvolution7X7
CIConvolution9Horizo​​ntal
CIConvolution9Vertical
CICrystallize
CIDepthOfField
CIEdges
CIEdgeWork
CIGloom
CIHeightFieldFromMask
CIHexagonalPixellate
CIHighlightShadowAdjust
CILineOverlay
CIPixellate
CIPointillize
CIShadedMaterial
CISpotColor
CISpotLight

CICategoryTileEffect
CIAffineClamp
CIAffineTile
CIEightfoldReflectedTile
CIFourfoldReflectedTile
CIFourfoldRotatedTile
CIFourfoldTranslatedTile
CIGlideReflectedTile
CIKaleidoscope
CIOpTile
CIParallelogramTile
CIPerspectiveTile
CISixfoldReflectedTile
CISixfoldRotatedTile
CITriangleKaleidoscope
CITriangleTile
CITwelvefoldReflectedTile

CICategoryTransition
CIAccordionFoldTransition
CIBarsSwipeTransition
CICopyMachineTransition
CIDisintegrateWithMaskTransition
CIDissolveTransition
CIFlashTransition
CIModTransition
CIPageCurlTransition
CIPageCurlWithShadowTransition
CIRippleTransition
CISwipeTransition