Android Open Source - FxCameraApp Gl Shi Tomasi Feature Detection Shader






From Project

Back to project page FxCameraApp.

License

The source code is released under:

MIT License

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Java Source Code

package com.af.experiments.FxCameraApp.shaders;
/*from  www  . ja v  a2 s  . c  om*/
import static android.opengl.GLES20.glUniform1f;

public class GlShiTomasiFeatureDetectionShader extends GlShader {

  private static final String FRAGMENT_SHADER =
      "precision mediump float;\n" +   // ?????????????????

      "varying highp vec2 vTextureCoord;" +
      "uniform lowp sampler2D sTexture;" +
      "uniform lowp float sensitivity;" +

      "void main() {" +
        "mediump vec3 derivativeElements = texture2D(sTexture, vTextureCoord).rgb;" +

        "mediump float derivativeDifference = derivativeElements.x - derivativeElements.y;" +
        "mediump float zElement = (derivativeElements.z * 2.0) - 1.0;" +

        // R = Ix^2 + Iy^2 - sqrt( (Ix^2 - Iy^2)^2 + 4 * Ixy * Ixy)
        "mediump float cornerness = derivativeElements.x + derivativeElements.y - sqrt(derivativeDifference * derivativeDifference + 4.0 * zElement * zElement);" +

        "gl_FragColor = vec4(vec3(cornerness * sensitivity), 1.0);" +
      "}";

  private float mSensitivity = 1.5f;

  public GlShiTomasiFeatureDetectionShader() {
    super(DEFAULT_VERTEX_SHADER, FRAGMENT_SHADER);
  }


  public float getSensitivity() {
    return mSensitivity;
  }

  public void setSensitivity(final float sensitivity) {
    mSensitivity = sensitivity;
  }

  @Override
  public void onDraw() {
    glUniform1f(getHandle("sensitivity"), mSensitivity);
  }

}




Java Source Code List

com.af.experiments.FxCameraApp.FilterAdapter.java
com.af.experiments.FxCameraApp.MyActivity.java
com.af.experiments.FxCameraApp.Utils.BitmapFactoryUtils.java
com.af.experiments.FxCameraApp.Utils.ExifUtils.java
com.af.experiments.FxCameraApp.Utils.Fps.java
com.af.experiments.FxCameraApp.Utils.LogWriter.java
com.af.experiments.FxCameraApp.Utils.OpenGlUtils.java
com.af.experiments.FxCameraApp.View.CameraView.java
com.af.experiments.FxCameraApp.View.DefaultPreview.java
com.af.experiments.FxCameraApp.View.GlPreview.java
com.af.experiments.FxCameraApp.View.PreviewTexture.java
com.af.experiments.FxCameraApp.camera.CameraHelperBase.java
com.af.experiments.FxCameraApp.camera.CameraHelperCupcake.java
com.af.experiments.FxCameraApp.camera.CameraHelperDonut.java
com.af.experiments.FxCameraApp.camera.CameraHelperEclair.java
com.af.experiments.FxCameraApp.camera.CameraHelperFactory.java
com.af.experiments.FxCameraApp.camera.CameraHelperFroyo.java
com.af.experiments.FxCameraApp.camera.CameraHelperGingerbread.java
com.af.experiments.FxCameraApp.camera.CameraHelperHonycomb.java
com.af.experiments.FxCameraApp.camera.CameraHelperICS.java
com.af.experiments.FxCameraApp.camera.CameraHelper.java
com.af.experiments.FxCameraApp.display.DisplayHelperBase.java
com.af.experiments.FxCameraApp.display.DisplayHelperFactory.java
com.af.experiments.FxCameraApp.display.DisplayHelperFroyo.java
com.af.experiments.FxCameraApp.display.DisplayHelperHoneycombMR2.java
com.af.experiments.FxCameraApp.display.DisplayHelperHoneycomb.java
com.af.experiments.FxCameraApp.display.DisplayHelper.java
com.af.experiments.FxCameraApp.ogles.DefaultConfigChooser.java
com.af.experiments.FxCameraApp.ogles.DefaultContextFactory.java
com.af.experiments.FxCameraApp.ogles.DefaultWindowSurfaceFactory.java
com.af.experiments.FxCameraApp.ogles.EGLLogWrapper.java
com.af.experiments.FxCameraApp.ogles.GLES20ConfigChooser.java
com.af.experiments.FxCameraApp.ogles.GLES20ContextFactory.java
com.af.experiments.FxCameraApp.ogles.GlImageBitmapTexture.java
com.af.experiments.FxCameraApp.ogles.GlImageResourceTexture.java
com.af.experiments.FxCameraApp.ogles.GlImageTexture.java
com.af.experiments.FxCameraApp.ogles.GlPreviewTextureFactory.java
com.af.experiments.FxCameraApp.ogles.GlSurfaceTexture.java
com.af.experiments.FxCameraApp.ogles.GlTextureView.java
com.af.experiments.FxCameraApp.ogles.PixelBuffer.java
com.af.experiments.FxCameraApp.ogles.PreviewSurfaceHelperBase.java
com.af.experiments.FxCameraApp.ogles.PreviewSurfaceHelperFactory.java
com.af.experiments.FxCameraApp.ogles.PreviewSurfaceHelper.java
com.af.experiments.FxCameraApp.ogles.Texture.java
com.af.experiments.FxCameraApp.renderer.GLES20FramebufferObject.java
com.af.experiments.FxCameraApp.renderer.GlFrameBufferObjectRenderer.java
com.af.experiments.FxCameraApp.renderer.MainRenderer.java
com.af.experiments.FxCameraApp.shaders.GlBilateralShader.java
com.af.experiments.FxCameraApp.shaders.GlBoxBlurShader.java
com.af.experiments.FxCameraApp.shaders.GlBulgeDistortionShader.java
com.af.experiments.FxCameraApp.shaders.GlCGAColorspaceShader.java
com.af.experiments.FxCameraApp.shaders.GlColorInvertShader.java
com.af.experiments.FxCameraApp.shaders.GlColorMatrixShader.java
com.af.experiments.FxCameraApp.shaders.GlColorPackingShader.java
com.af.experiments.FxCameraApp.shaders.GlConvolutionShader.java
com.af.experiments.FxCameraApp.shaders.GlEmbossShader.java
com.af.experiments.FxCameraApp.shaders.GlFalseColorShader.java
com.af.experiments.FxCameraApp.shaders.GlFastBlurShader.java
com.af.experiments.FxCameraApp.shaders.GlGaussianBlurShader.java
com.af.experiments.FxCameraApp.shaders.GlGlassSphereShader.java
com.af.experiments.FxCameraApp.shaders.GlGrayScaleShader.java
com.af.experiments.FxCameraApp.shaders.GlHarrisCornerDetectionShader.java
com.af.experiments.FxCameraApp.shaders.GlHazeShader.java
com.af.experiments.FxCameraApp.shaders.GlMonochromeShader.java
com.af.experiments.FxCameraApp.shaders.GlNobleCornerDetectionShader.java
com.af.experiments.FxCameraApp.shaders.GlPerlinNoiseShader.java
com.af.experiments.FxCameraApp.shaders.GlPinchDistortionShader.java
com.af.experiments.FxCameraApp.shaders.GlPixellateShader.java
com.af.experiments.FxCameraApp.shaders.GlPolarPixellateShader.java
com.af.experiments.FxCameraApp.shaders.GlPolkaDotShader.java
com.af.experiments.FxCameraApp.shaders.GlPosterizeShader.java
com.af.experiments.FxCameraApp.shaders.GlPreviewShader.java
com.af.experiments.FxCameraApp.shaders.GlSepiaShader.java
com.af.experiments.FxCameraApp.shaders.GlShaderGroup.java
com.af.experiments.FxCameraApp.shaders.GlShader.java
com.af.experiments.FxCameraApp.shaders.GlSharpenShader.java
com.af.experiments.FxCameraApp.shaders.GlShiTomasiFeatureDetectionShader.java
com.af.experiments.FxCameraApp.shaders.GlSobelEdgeDetectionShader.java
com.af.experiments.FxCameraApp.shaders.GlSphereRefractionShader.java
com.af.experiments.FxCameraApp.shaders.GlStretchDistortionShader.java
com.af.experiments.FxCameraApp.shaders.GlThreex3ConvolutionShader.java
com.af.experiments.FxCameraApp.shaders.GlThreex3TextureSamplingShader.java
com.af.experiments.FxCameraApp.shaders.GlToneShader.java
com.af.experiments.FxCameraApp.shaders.GlTwoInputShader.java
com.af.experiments.FxCameraApp.shaders.GlVignetteShader.java
com.af.experiments.FxCameraApp.shaders.GlWeakPixelInclusionShader.java
com.af.experiments.FxCameraApp.shaders.GlWhiteBalanceShader.java
com.af.experiments.FxCameraApp.shaders.GlXRayShader.java
com.af.experiments.FxCameraApp.shaders.GlXYDerivativeShader.java
com.af.experiments.FxCameraApp.shaders.fx.GlLutShader.java