A Low-Memory, Straightforward and Fast Bilateral Filter Through Subsampling in Spatial Domain
Abstract
abstract
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SpiderGL.openNamespace(); function CanvasHandler() { } CanvasHandler.prototype = { ///////////////////////////////////////////////////////////////////////////////////// onInitialize : function () { var gl = this.ui.gl; var quadPositions = new Float32Array([ -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0 ]); var quadTexcoords = new Float32Array([ 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 1.0, 1.0 ]); var quad = new SglModel(gl, { data : { vertexBuffers : { “positionBuffer” : { typedArray : quadPositions}, “texcoordBuffer” : { typedArray : quadTexcoords} }, indexBuffers : { } }, access : { vertexStreams : { “position” : { buffer : “positionBuffer”, size : 2, type : SGL_FLOAT32, stride : 2 * SGL_SIZEOF_FLOAT32, offset : 0 }, “texcoord” : { buffer : “texcoordBuffer”, size : 2, type : SGL_FLOAT32, stride : 2 * SGL_SIZEOF_FLOAT32, offset : 0 } }, primitiveStreams : { “triangles” : { mode : SGL_TRIANGLE_STRIP, first : 0, count : 4 //number of verticies } } }, semantic : { bindings : { “COMMON” : { vertexStreams : { “POSITION” : [ “position” ], “TEXCOORD”: [ “texcoord” ] }, primitiveStreams : { “FILL” : [ “triangles” ] } } }, chunks : { “chunk0” : { techniques : { “COMMON” : { binding : “COMMON” } } } } }, logic : { parts : { “main” : { chunks : [ “chunk0” ] } } } }); this.quad = quad; var fsQuad = new SglFragmentShader(gl,"\ precision highp float; \n\ \n\ uniform sampler2D sTexture;\n\ uniform sampler2D sTextureSamples; \n\ varying vec2 vTexcoord; \n\ uniform float scaleX, scaleY, scaleY2, sigma_r2, sigma_s2;\n\ \n\ \n\ void main(void) \n\ { \n\ vec3 colorRef = texture2D(sTexture, vTexcoord).xyz; \n\ vec3 color = vec3(0.0,0.0,0.0);\n\ float yFetch = vTexcoord.y*scaleY2;\n\ float weight = 0.0;\n\ for(int i=0;i
