Update README.md

README.md

@@ -24,22 +24,30 @@ These are stored as `CIVector`s in an `NSArray`, with normalized X and Y coordin
 
 The defaults are `[(0,0), (0.5,0.5), (1,1)]`
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCIRGBToneCurve.png)
+
 ####YUCIColorLookup
 
 Uses a color lookup table (LUT) to remap the colors in an image. The default LUT can be found at `Sources/YUCIColorLookupTableDefault.png`
 
 *This filter may not work well in the default light-linear working color space. Use `kCIContextWorkingColorSpace` key to specify a working color space when creating the `CIContext` object.*
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCIColorLookup.png)
+
 ####YUCISurfaceBlur
 
 Blurs an image while preserving edges. This filter is almost identical to Photoshop's "Surface Blur" filter.
 
 Useful for creating special effects and for removing noise or graininess. Slow on large `inputRadius`.
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCISurfaceBlur.png)
+
 ####YUCITriangularPixellate
 
 Maps an image to colored triangles.
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCITriangularPixellate.png)
+
 ####YUCIFXAA
 
 A basic implementation of FXAA (Fast Approximate Anti-Aliasing).
@@ -50,20 +58,28 @@ A basic implementation of FXAA (Fast Approximate Anti-Aliasing).
 
 A transition that pushes the `inputImage` toward the viewer and then snaps back with the `inputTargetImage`.
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCICrossZoomTransition.gif)
+
 ####YUCIFlashTransition
 
 Transitions from one image to another by creating a flash effect.
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCIFlashTransition.gif)
+
 ###Generators
 
 ####YUCIStarfieldGenerator
 
 Generate a starfield image. Animatable by changing the `inputTime` parameter. Based on [Star Nest](https://www.shadertoy.com/view/XlfGRj) by Pablo Román Andrioli
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCIStarfieldGenerator.gif)
+
 ####YUCIBlobsGenerator
 
 Generate a image with colorful blobs. Animatable by changing the `inputTime` parameter. Based on [Blobs](https://www.shadertoy.com/view/lsfGzr) by [@paulofalcao](https://twitter.com/paulofalcao)
 
+![Preview](http://yuao.github.io/Vivid/previews/YUCIBlobsGenerator.gif)
+
 ##Utilities
 
 ####YUCIFilterConstructor