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Slight tweak to clamp thresholds

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Steven Robertson 2011-12-08 12:13:58 -05:00
parent b73461132c
commit e006ec1915
1 changed files with 8 additions and 7 deletions
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15
cuburn/code/filtering.py
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@ -151,11 +151,9 @@ void density_est(float4 *pixbuf, float4 *outbuf,
// like MLAA.
float *dens = reinterpret_cast<float*>(pixbuf);
int didx = idx * 4 + 3;
float x = 0.25f * ( dens[didx+stride*4+4]
- dens[didx-stride*4-4] );
float y = 0.25f * ( dens[didx+stride*4-4]
- dens[didx-stride*4+4] );
float diag_mag = sqrtf(x*x + y*y);
float x = dens[didx+stride*4+4] - dens[didx-stride*4-4];
float y = dens[didx+stride*4-4] - dens[didx-stride*4+4];
float diag_mag = sqrtf(x*x + y*y) * 0.3333333f;
float ls = k1 * logf(1.0f + in.w * k2) / in.w;
in.x *= ls;
@ -175,7 +173,11 @@ void density_est(float4 *pixbuf, float4 *outbuf,
// If the gradient SD is smaller than the minimum SD, we're probably
// on a strong edge; blur with a standard deviation around 1px.
if (diag_sd < fmaxf(est_min, MIN_SD)) sd = 0.333333f;
if (diag_sd < MIN_SD && diag_sd < sd) {
sd = 0.3333333f;
// Uncomment to see which pixels are being clamped
// de_g[si] = 1.0f;
}
// Clamp the final standard deviation.
sd = fminf(MAX_SD, fmaxf(sd, est_min));
@ -265,7 +267,6 @@ void density_est(float4 *pixbuf, float4 *outbuf,
}
__syncthreads();
// TODO: shift instead of copying
int tid = threadIdx.y * 32 + threadIdx.x;
for (int i = tid; i < FW*(W2+W2); i += 512) {
de_r[i] = de_r[i+FW*32];