Java Image Filters 是由 Jhlabs 开发的一组用来处理 Java 图像的类库，提供各种常用的图像处理效果，例如反转色、扭曲、水波纹、凹凸、黑白效果等等数十种效果，如下图所示：
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Color Adjustment Filters
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ChannelMixFilter - Mixes the RGB channels
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ContrastFilter - Adjusts brightness and contrast
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CurvesFilter - Apply adjustment curves to an image
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DiffusionFilter - Error-diffusion dithering
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DitherFilter - Ordered dithering
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ExposureFilter - Change the exposure of an image
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GainFilter - Adjusts gain and bias
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GammaFilter - Adjusts image gamma
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GrayFilter - Grays out an image
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GrayscaleFilter - Converts to grayscale
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HSBAdjustFilter - Adjusts hue, saturation and brightness
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InvertAlphaFilter - Inverts the alpha channel
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InvertFilter - Inverts image colors
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LevelsFilter - Adjust image levels
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LookupFilter - Change image colors with a lookup table
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MapColorsFilter - Replace a color
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MaskFilter - Channel masking
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PosterizeFilter - Posterization
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QuantizeFilter - Quantize an image to 256 colors for, say, GIF export
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RescaleFilter - Multiplies colors by a scaling factor
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RGBAdjustFilter - Adjusts red, green and blue levels
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SolarizeFilter - Solarization
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ThresholdFilter - Thresholding
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TritoneFilter - Create a tri-tone image
Distortion and Warping Filters
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BicubicScaleFilter - Scaling with bicubic interpolation
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CircleFilter - Wrap an image around a circle
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CropFilter - Crop an area from an image
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DiffuseFilter - Diffuse the pixels of an image
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DisplaceFilter - A glass distortion effect
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DissolveFilter - Dissolves an image by turning random pixels transparent
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FieldWarpFilter - Warp images using a field warp algorithm
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FlipFilter - Flip and rotate images
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KaleidoscopeFilter - A kaleidoscope effect
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MarbleFilter - A marbling effect
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MirrorFilter - Mirror an image
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OffsetFilter - Offset an image for tiling
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PerspectiveFilter - Perspective distortion
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PinchFilter - Whirl-and-pinch distortion
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PolarFilter - Convert to and from polar coordinates
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RippleFilter - Ripple distortion
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RotateFilter - Rotate an image
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ScaleFilter - Scale an image with area-averaging
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ShearFilter - Shear an image
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SphereFilter - Lens distortion
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SwimFilter - An "underwater" distortion effect
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TileImageFilter - Tile an image into a larger image
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TwirlFilter - Distort an image by twisting
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WarpFilter - A general grid image warp
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WaterFilter - Simulate water ripples
Effects Filters
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BlockFilter - Mosaic or pixellate an image
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BorderFilter - Add a border
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ChromeFilter - Simulate chrome
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ColorHalftoneFilter - Color halftoning effect.
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CrystallizeFilter - Make an image look like stained glass
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EmbossFilter - Simple embossing
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FeedbackFilter - A video feedback effect
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HalftoneFilter - Simple halftoning
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LightFilter - Simulate lights on an bump-mapped image
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NoiseFilter - Add noise
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PointillizeFilter - Draw an image as colored spots
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ShadowFilter - Create drop shadows
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ShapeFilter - Create bump maps for lighting
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StampFilter - A rubber stamp effect
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WeaveFilter - A woven image effect
Texturing Filters
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BrushedMetalFilter - Created brushed metal
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CausticsFilter - Simulate underwater caustics
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CellularFilter - Cellular texturing
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CheckFilter - Draw a checkerboard pattern
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FBMFilter - Fractal Brownian motion texturing
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FillFilter - Fill an image with a color
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FlareFilter - Create lens flares
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FourColorFilter - Draw a four-color gradient
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GradientFilter - Draw radial, linear, fan and square gradients
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PlasmaFilter - Create plasma
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TextureFilter - Perlin noise texturing
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ScratchFilter - Render lines or scratches
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SmearFilter - Painting effects
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SparkleFilter - Render sparkles
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WoodFilter -Create a wood texture
Blurring and Sharpening Filters
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BlurFilter - Simple blur
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BoxBlurFilter - Box blur
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BumpFilter - Edge embossing
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ConvolveFilter - General convolution
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DespeckleFilter - De-speckle an image
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GaussianFilter - Gaussian blur
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GlowFilter - Add a glow to an image
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HighPassFilter - Remove low spatial frequencies
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LensBlurFilter - Simulate camera lens blur
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MaximumFilter - Dilation
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MedianFilter - Median filter for noise reduction
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MinimumFilter - Erosion
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MotionBlurFilter - Simulate motion blur
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OilFilter - Oil painting effect
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RaysFilter - Create light rays
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ReduceNoiseFilter - Remove noise from an image
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SharpenFilter - Simple sharpening
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SmartBlurFilter - A thresholded blur for ironing out wrinkles
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UnsharpFilter - Sharpening by unsharp masking
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VariableBlurFilter - Blurring with a variable radius taken from a mask
Edge Detection
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DoGFilter - Edge detection by Difference of Gaussians
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EdgeFilter - Edge detection
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LaplaceFilter - Edge detection by Laplace operator
Transitions
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BlurTransition - Transition with a blur
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GradientWipeFilter - Use a mask to dissolve one image into another
Alpha Channel Filters
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OpacityFilter - Change image opacity
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Other Filters
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项目地址：
http://www.jhlabs.com/ip/filters/index.html
http://www.jhlabs.com/index.html