diff options
Diffstat (limited to 'src/kernels/nlm.cl')
| -rw-r--r-- | src/kernels/nlm.cl | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/src/kernels/nlm.cl b/src/kernels/nlm.cl index c3ae3f3..df96fbd 100644 --- a/src/kernels/nlm.cl +++ b/src/kernels/nlm.cl @@ -24,7 +24,8 @@ dist (read_only image2d_t input, float2 q, int radius, int width, - int height) + int height, + float variance) { float dist = 0.0f, tmp; float wsize = (2.0f * radius + 1.0f); @@ -34,7 +35,7 @@ dist (read_only image2d_t input, for (int j = -radius; j < radius + 1; j++) { tmp = read_imagef (input, sampler, (float2) ((p.x + i) / width, (p.y + j) / height)).x - read_imagef (input, sampler, (float2) ((q.x + i) / width, (q.y + j) / height)).x; - dist += tmp * tmp; + dist += fmax (0.0f, tmp * tmp - 2 * variance); } } @@ -47,13 +48,13 @@ nlm_noise_reduction (read_only image2d_t input, sampler_t sampler, const int search_radius, const int patch_radius, - const float sigma) + const float h_2, + const float variance) { const int x = get_global_id (0); const int y = get_global_id (1); const int width = get_global_size (0); const int height = get_global_size (1); - const float sigma_2 = sigma * sigma; float d, weight; float total_weight = 0.0f; @@ -62,8 +63,8 @@ nlm_noise_reduction (read_only image2d_t input, for (int i = x - search_radius; i < x + search_radius + 1; i++) { for (int j = y - search_radius; j < y + search_radius + 1; j++) { d = dist (input, sampler, (float2) (x + 0.5f, y + 0.5f), (float2) (i + 0.5f, j + 0.5f), - patch_radius, width, height); - weight = exp (- sigma_2 * d); + patch_radius, width, height, variance); + weight = exp (- h_2 * d); pixel_value += weight * read_imagef (input, sampler, (float2) ((i + 0.5f) / width, (j + 0.5f) / height)).x; total_weight += weight; } |