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Expand max filter radius to 21 pixels

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This commit is contained in:
Steven Robertson 2011-10-28 08:23:33 -04:00
parent f3a79b200c
commit 6b2cb024ac
3 changed files with 17 additions and 21 deletions
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33
cuburn/code/filtering.py
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@ -87,13 +87,10 @@ void colorclip(float4 *pixbuf, float gamma, float vibrancy, float highpow,
class DensityEst(HunkOCode):
"""
NOTE: for now, this *must* be invoked with a block size of (32,32,1), and
a grid size of (W/32,1). At least 15 pixel gutters are required, and the
a grid size of (W/32,1). At least 21 pixel gutters are required, and the
stride and height probably need to be multiples of 32.
"""
# Note, changing this does not yet have any effect, it's just informational
MAX_WIDTH=15
def __init__(self, info):
self.info = info
@ -103,9 +100,9 @@ class DensityEst(HunkOCode):
return self.defs_tmpl.substitute(info=self.info)
defs_tmpl = Template('''
#define W 15 // Filter width (regardless of standard deviation chosen)
#define W2 7 // Half of filter width, rounded down
#define FW 46 // Width of local result storage (NW+W2+W2)
#define W 21 // Filter width (regardless of standard deviation chosen)
#define W2 10 // Half of filter width, rounded down
#define FW 52 // Width of local result storage (NW+W2+W2)
#define FW2 (FW*FW)
__shared__ float de_r[FW2], de_g[FW2], de_b[FW2], de_a[FW2];
@ -137,7 +134,7 @@ void logscale(float4 *pixbuf, float4 *outbuf, float k1, float k2) {
// See helpers/filt_err.py for source of these values.
#define MIN_SD 0.23299530f
#define MAX_SD 2.5f
#define MAX_SD 4.33333333f
__global__
void density_est(float4 *pixbuf, float4 *outbuf,
@ -199,15 +196,15 @@ void density_est(float4 *pixbuf, float4 *outbuf,
filtsum = filtsum * sd + 9.04126644f;
filtsum = filtsum * sd + 0.10304667f;
} else {
filtsum = -0.00403376f;
filtsum = filtsum * sd + 0.06608720f;
filtsum = filtsum * sd + -0.38924992f;
filtsum = filtsum * sd + 0.84797901f;
filtsum = filtsum * sd + 0.34173131f;
filtsum = filtsum * sd + -4.67077589f;
filtsum = filtsum * sd + 14.34595776f;
filtsum = filtsum * sd + -5.80082798f;
filtsum = filtsum * sd + 1.54098487f;
filtsum = 0.01162011f;
filtsum = filtsum * sd + -0.21552004f;
filtsum = filtsum * sd + 1.66545594f;
filtsum = filtsum * sd + -7.00809765f;
filtsum = filtsum * sd + 17.55487633f;
filtsum = filtsum * sd + -26.80626106f;
filtsum = filtsum * sd + 30.61903954f;
filtsum = filtsum * sd + -12.00870514f;
filtsum = filtsum * sd + 2.46708894f;
}
float filtscale = 1.0f / filtsum;
@ -225,6 +222,7 @@ void density_est(float4 *pixbuf, float4 *outbuf,
float coeff = exp2f((jj2f + iif * iif) * rsd)
* filtscale;
if (coeff < 0.0001f) break;
iif += 1;
float4 scaled;
scaled.x = in.x * coeff;
@ -247,7 +245,6 @@ void density_est(float4 *pixbuf, float4 *outbuf,
de_add(si, -jj, -ii, scaled);
de_add(si, jj, -ii, scaled);
iif += 1;
}
}
}

3
cuburn/genome.py
View File

@ -96,7 +96,7 @@ class RenderInfo(object):
# Maximum width of DE and other spatial filters, and thus in turn the
# amount of padding applied. Note that, for now, this must not be changed!
# The filtering code makes deep assumptions about this value.
gutter = 16
gutter = 22
# TODO: for now, we always throw away the alpha channel before writing.
# All code is in place to not do this, we just need to find a way to expose
@ -106,7 +106,6 @@ class RenderInfo(object):
# TODO: fix these
chaos_used = False
std_xforms = [0, 1, 2]
final_xform_index = 3
pal_has_alpha = False
density = 2000

2
helpers/filt_err.py
View File

@ -1,7 +1,7 @@
import numpy as np
# The maximum number of coeffecients that will ever be retained on the device
FWIDTH = 15
FWIDTH = 21
# The number of points on either side of the center in one dimension
F2 = int(FWIDTH/2)