您好,登錄后才能下訂單哦!
下圖是使用高斯模糊和未使用高斯模糊的效果圖對比
正常圖片
高斯模糊后
1、標(biāo)準(zhǔn)高斯模糊
原理:
每個(gè)像素周圍對應(yīng)的像素乘以對應(yīng)的算子,然后除以算子的綜合
算子為
1 2 1
2 4 2
1 2 1
fragment shader
varying vec2 M_coord; varying vec3 M_normal; varying vec3 M_WordPos; uniform sampler2D U_MainTexture; uniform sampler2D U_SubTexture; void main() { // 1 2 1 // 2 4 2 // 1 2 1 int coreSize=3; int halfCoreSize=coreSize/2; float texelOffset=1/100.0; vec4 color = vec4(1.0); float nGaussionCore[9] = float[](1.0, 2.0, 1.0, 2.0, 4.0, 2.0, 6.0, 2.0, 1.0); int index = 0; for(int y=0;y<coreSize;y++) { for(int x=0;x<coreSize;x++) { vec4 currentColor=texture2D(U_MainTexture, M_coord+vec2((-halfCoreSize+x)*texelOffset, (-halfCoreSize+y)*texelOffset)); color += currentColor * nGaussionCore[index++]; } } color /= 16.0; gl_FragColor=color ; }
2、橫向模糊
與高斯模糊類似 不過只是模糊橫向分量
// 水平高斯模糊 varying vec2 M_coord; varying vec3 M_normal; varying vec3 M_WordPos; uniform sampler2D U_MainTexture; uniform sampler2D U_SubTexture; void main() { int coreSize=3; int halfCoreSize=coreSize/2; float texelOffset=1/100.0; vec4 color = vec4(0.0); float nGaussionCore[5] = float[](0.22, 0.19, 0.12, 0.08, 0.01); color = texture2D(U_MainTexture, M_coord) * nGaussionCore[0]; for (int i=1; i<5; ++i) { color += texture2D(U_MainTexture, vec2(M_coord.x + i * texelOffset, M_coord.y)) * nGaussionCore[i]; color += texture2D(U_MainTexture, vec2(M_coord.x + i * texelOffset, M_coord.y)) * nGaussionCore[i]; } gl_FragColor=color ; }
3、縱向模糊
與高斯模糊類似 不過只是模糊縱向分量
varying vec2 M_coord; varying vec3 M_normal; varying vec3 M_WordPos; uniform sampler2D U_MainTexture; uniform sampler2D U_SubTexture; void main() { int coreSize=3; int halfCoreSize=coreSize/2; float texelOffset=1/100.0; vec4 color = vec4(0.0); float nGaussionCore[5] = float[](0.22, 0.19, 0.12, 0.08, 0.01); color = texture2D(U_MainTexture, M_coord) * nGaussionCore[0]; for (int i=1; i<5; ++i) { color += texture2D(U_MainTexture, vec2(M_coord.x, i * texelOffset + M_coord.y)) * nGaussionCore[i]; color += texture2D(U_MainTexture, vec2(M_coord.x, i * texelOffset + M_coord.y)) * nGaussionCore[i]; } gl_FragColor=color ; }
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。