Searched defs:sigma (Results 1 - 3 of 3) sorted by relevance

/frameworks/base/libs/hwui/utils/
H A DBlur.cpp31 // g(x) = ( 1 / sqrt( 2 * pi ) * sigma) * e ^ ( -x^2 / 2 * sigma^2 )
33 // and sigma varies with radius.
34 // Based on some experimental radius values and sigma's
35 // we approximately fit sigma = f(radius) as
36 // sigma = radius * 0.3 + 0.6
38 // will resemble a box blur since with large sigma
40 float sigma = 0.3f * (float) radius + 0.6f; local
46 float coeff1 = 1.0f / (sqrt(2.0f * pi) * sigma);
47 float coeff2 = - 1.0f / (2.0f * sigma * sigm
[all...]
/frameworks/native/services/sensorservice/
H A DFusion.cpp433 void Fusion::update(const vec3_t& z, const vec3_t& Bi, float sigma) { argument
446 const mat33_t R(sigma*sigma);
/frameworks/rs/cpu_ref/
H A DrsCpuIntrinsicBlur.cpp68 // g(x) = ( 1 / sqrt( 2 * pi ) * sigma) * e ^ ( -x^2 / 2 * sigma^2 )
70 // and sigma varies with radius.
71 // Based on some experimental radius values and sigma's
72 // we approximately fit sigma = f(radius) as
73 // sigma = radius * 0.4 + 0.6
75 // will resemble a box blur since with large sigma
77 float sigma = 0.4f * mRadius + 0.6f; local
81 float coeff1 = 1.0f / (sqrtf(2.0f * pi) * sigma);
82 float coeff2 = - 1.0f / (2.0f * sigma * sigm
[all...]

Completed in 710 milliseconds