* be found in the AUTHORS file in the root of the source tree.
*/
+#include <limits.h>
+
#include "denoising.h"
#include "vp8/common/reconinter.h"
return FILTER_BLOCK;
}
+int vp8_denoiser_filter_uv_c(unsigned char *mc_running_avg_uv,
+ int mc_avg_uv_stride,
+ unsigned char *running_avg_uv,
+ int avg_uv_stride,
+ unsigned char *sig,
+ int sig_stride,
+ unsigned int motion_magnitude,
+ int increase_denoising) {
+ unsigned char *running_avg_uv_start = running_avg_uv;
+ unsigned char *sig_start = sig;
+ int sum_diff_thresh;
+ int r, c;
+ int sum_diff = 0;
+ int sum_block = 0;
+ int adj_val[3] = {3, 4, 6};
+ int shift_inc1 = 0;
+ int shift_inc2 = 1;
+ /* If motion_magnitude is small, making the denoiser more aggressive by
+ * increasing the adjustment for each level. Add another increment for
+ * blocks that are labeled for increase denoising. */
+ if (motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD_UV) {
+ if (increase_denoising) {
+ shift_inc1 = 1;
+ shift_inc2 = 2;
+ }
+ adj_val[0] += shift_inc2;
+ adj_val[1] += shift_inc2;
+ adj_val[2] += shift_inc2;
+ }
+
+ // Avoid denoising color signal if its close to average level.
+ for (r = 0; r < 8; ++r) {
+ for (c = 0; c < 8; ++c) {
+ sum_block += sig[c];
+ }
+ sig += sig_stride;
+ }
+ if (abs(sum_block - (128 * 8 * 8)) < SUM_DIFF_FROM_AVG_THRESH_UV) {
+ return COPY_BLOCK;
+ }
+
+ sig -= sig_stride * 8;
+ for (r = 0; r < 8; ++r) {
+ for (c = 0; c < 8; ++c) {
+ int diff = 0;
+ int adjustment = 0;
+ int absdiff = 0;
+
+ diff = mc_running_avg_uv[c] - sig[c];
+ absdiff = abs(diff);
+
+ // When |diff| <= |3 + shift_inc1|, use pixel value from
+ // last denoised raw.
+ if (absdiff <= 3 + shift_inc1) {
+ running_avg_uv[c] = mc_running_avg_uv[c];
+ sum_diff += diff;
+ } else {
+ if (absdiff >= 4 && absdiff <= 7)
+ adjustment = adj_val[0];
+ else if (absdiff >= 8 && absdiff <= 15)
+ adjustment = adj_val[1];
+ else
+ adjustment = adj_val[2];
+ if (diff > 0) {
+ if ((sig[c] + adjustment) > 255)
+ running_avg_uv[c] = 255;
+ else
+ running_avg_uv[c] = sig[c] + adjustment;
+ sum_diff += adjustment;
+ } else {
+ if ((sig[c] - adjustment) < 0)
+ running_avg_uv[c] = 0;
+ else
+ running_avg_uv[c] = sig[c] - adjustment;
+ sum_diff -= adjustment;
+ }
+ }
+ }
+ /* Update pointers for next iteration. */
+ sig += sig_stride;
+ mc_running_avg_uv += mc_avg_uv_stride;
+ running_avg_uv += avg_uv_stride;
+ }
+
+ sum_diff_thresh= SUM_DIFF_THRESHOLD_UV;
+ if (increase_denoising) sum_diff_thresh = SUM_DIFF_THRESHOLD_HIGH_UV;
+ if (abs(sum_diff) > sum_diff_thresh) {
+ // Before returning to copy the block (i.e., apply no denoising), check
+ // if we can still apply some (weaker) temporal filtering to this block,
+ // that would otherwise not be denoised at all. Simplest is to apply
+ // an additional adjustment to running_avg_y to bring it closer to sig.
+ // The adjustment is capped by a maximum delta, and chosen such that
+ // in most cases the resulting sum_diff will be within the
+ // accceptable range given by sum_diff_thresh.
+
+ // The delta is set by the excess of absolute pixel diff over threshold.
+ int delta = ((abs(sum_diff) - sum_diff_thresh) >> 8) + 1;
+ // Only apply the adjustment for max delta up to 3.
+ if (delta < 4) {
+ sig -= sig_stride * 8;
+ mc_running_avg_uv -= mc_avg_uv_stride * 8;
+ running_avg_uv -= avg_uv_stride * 8;
+ for (r = 0; r < 8; ++r) {
+ for (c = 0; c < 8; ++c) {
+ int diff = mc_running_avg_uv[c] - sig[c];
+ int adjustment = abs(diff);
+ if (adjustment > delta)
+ adjustment = delta;
+ if (diff > 0) {
+ // Bring denoised signal down.
+ if (running_avg_uv[c] - adjustment < 0)
+ running_avg_uv[c] = 0;
+ else
+ running_avg_uv[c] = running_avg_uv[c] - adjustment;
+ sum_diff -= adjustment;
+ } else if (diff < 0) {
+ // Bring denoised signal up.
+ if (running_avg_uv[c] + adjustment > 255)
+ running_avg_uv[c] = 255;
+ else
+ running_avg_uv[c] = running_avg_uv[c] + adjustment;
+ sum_diff += adjustment;
+ }
+ }
+ // TODO(marpan): Check here if abs(sum_diff) has gone below the
+ // threshold sum_diff_thresh, and if so, we can exit the row loop.
+ sig += sig_stride;
+ mc_running_avg_uv += mc_avg_uv_stride;
+ running_avg_uv += avg_uv_stride;
+ }
+ if (abs(sum_diff) > sum_diff_thresh)
+ return COPY_BLOCK;
+ } else {
+ return COPY_BLOCK;
+ }
+ }
+
+ vp8_copy_mem8x8(running_avg_uv_start, avg_uv_stride, sig_start,
+ sig_stride);
+ return FILTER_BLOCK;
+}
+
+void vp8_denoiser_set_parameters(VP8_DENOISER *denoiser, int mode) {
+ assert(mode > 0); // Denoiser is allocated only if mode > 0.
+ if (mode == 1) {
+ denoiser->denoiser_mode = kDenoiserOnYOnly;
+ } else if (mode == 2) {
+ denoiser->denoiser_mode = kDenoiserOnYUV;
+ } else if (mode == 3) {
+ denoiser->denoiser_mode = kDenoiserOnYUVAggressive;
+ } else {
+ denoiser->denoiser_mode = kDenoiserOnAdaptive;
+ }
+ if (denoiser->denoiser_mode != kDenoiserOnYUVAggressive) {
+ denoiser->denoise_pars.scale_sse_thresh = 1;
+ denoiser->denoise_pars.scale_motion_thresh = 8;
+ denoiser->denoise_pars.scale_increase_filter = 0;
+ denoiser->denoise_pars.denoise_mv_bias = 95;
+ denoiser->denoise_pars.pickmode_mv_bias = 100;
+ denoiser->denoise_pars.qp_thresh = 0;
+ denoiser->denoise_pars.consec_zerolast = UINT_MAX;
+ } else {
+ denoiser->denoise_pars.scale_sse_thresh = 2;
+ denoiser->denoise_pars.scale_motion_thresh = 16;
+ denoiser->denoise_pars.scale_increase_filter = 1;
+ denoiser->denoise_pars.denoise_mv_bias = 60;
+ denoiser->denoise_pars.pickmode_mv_bias = 60;
+ denoiser->denoise_pars.qp_thresh = 100;
+ denoiser->denoise_pars.consec_zerolast = 10;
+ }
+}
+
int vp8_denoiser_allocate(VP8_DENOISER *denoiser, int width, int height,
- int num_mb_rows, int num_mb_cols)
+ int num_mb_rows, int num_mb_cols, int mode)
{
int i;
assert(denoiser);
vpx_memset(denoiser->yv12_mc_running_avg.buffer_alloc, 0,
denoiser->yv12_mc_running_avg.frame_size);
+ if (vp8_yv12_alloc_frame_buffer(&denoiser->yv12_last_source, width,
+ height, VP8BORDERINPIXELS) < 0) {
+ vp8_denoiser_free(denoiser);
+ return 1;
+ }
+ vpx_memset(denoiser->yv12_last_source.buffer_alloc, 0,
+ denoiser->yv12_last_source.frame_size);
+
denoiser->denoise_state = vpx_calloc((num_mb_rows * num_mb_cols), 1);
vpx_memset(denoiser->denoise_state, 0, (num_mb_rows * num_mb_cols));
-
+ vp8_denoiser_set_parameters(denoiser, mode);
+ denoiser->nmse_source_diff = 0;
+ denoiser->nmse_source_diff_count = 0;
+ // TODO(marpan): Adjust thresholds, including effect on resolution.
+ denoiser->threshold_aggressive_mode = 40;
+ if (width * height > 640 * 480)
+ denoiser->threshold_aggressive_mode = 180;
return 0;
}
+
void vp8_denoiser_free(VP8_DENOISER *denoiser)
{
int i;
vp8_yv12_de_alloc_frame_buffer(&denoiser->yv12_running_avg[i]);
}
vp8_yv12_de_alloc_frame_buffer(&denoiser->yv12_mc_running_avg);
+ vp8_yv12_de_alloc_frame_buffer(&denoiser->yv12_last_source);
+ vpx_free(denoiser->denoise_state);
}
int mb_row,
int mb_col,
int block_index)
+
{
int mv_row;
int mv_col;
+ unsigned int motion_threshold;
unsigned int motion_magnitude2;
unsigned int sse_thresh;
int sse_diff_thresh = 0;
MV_REFERENCE_FRAME zero_frame = x->best_zeromv_reference_frame;
enum vp8_denoiser_decision decision = FILTER_BLOCK;
+ enum vp8_denoiser_decision decision_u = COPY_BLOCK;
+ enum vp8_denoiser_decision decision_v = COPY_BLOCK;
if (zero_frame)
{
MB_MODE_INFO *mbmi = &filter_xd->mode_info_context->mbmi;
int sse_diff = 0;
// Bias on zero motion vector sse.
- int zero_bias = 95;
+ const int zero_bias = denoiser->denoise_pars.denoise_mv_bias;
zero_mv_sse = (unsigned int)((int64_t)zero_mv_sse * zero_bias / 100);
sse_diff = zero_mv_sse - best_sse;
mv_row = x->best_sse_mv.as_mv.row;
mv_col = x->best_sse_mv.as_mv.col;
motion_magnitude2 = mv_row * mv_row + mv_col * mv_col;
- sse_thresh = SSE_THRESHOLD;
- if (x->increase_denoising) sse_thresh = SSE_THRESHOLD_HIGH;
+ motion_threshold = denoiser->denoise_pars.scale_motion_thresh *
+ NOISE_MOTION_THRESHOLD;
- if (best_sse > sse_thresh || motion_magnitude2
- > 8 * NOISE_MOTION_THRESHOLD)
- {
- decision = COPY_BLOCK;
- }
+ if (motion_magnitude2 <
+ denoiser->denoise_pars.scale_increase_filter * NOISE_MOTION_THRESHOLD)
+ x->increase_denoising = 1;
+
+ sse_thresh = denoiser->denoise_pars.scale_sse_thresh * SSE_THRESHOLD;
+ if (x->increase_denoising)
+ sse_thresh = denoiser->denoise_pars.scale_sse_thresh * SSE_THRESHOLD_HIGH;
+
+ if (best_sse > sse_thresh || motion_magnitude2 > motion_threshold)
+ decision = COPY_BLOCK;
if (decision == FILTER_BLOCK)
{
/* Filter. */
decision = vp8_denoiser_filter(mc_running_avg_y, mc_avg_y_stride,
- running_avg_y, avg_y_stride,
- x->thismb, 16, motion_magnitude2,
- x->increase_denoising);
+ running_avg_y, avg_y_stride,
+ x->thismb, 16, motion_magnitude2,
+ x->increase_denoising);
denoiser->denoise_state[block_index] = motion_magnitude2 > 0 ?
kFilterNonZeroMV : kFilterZeroMV;
+ // Only denoise UV for zero motion, and if y channel was denoised.
+ if (denoiser->denoiser_mode != kDenoiserOnYOnly &&
+ motion_magnitude2 == 0 &&
+ decision == FILTER_BLOCK) {
+ unsigned char *mc_running_avg_u =
+ denoiser->yv12_mc_running_avg.u_buffer + recon_uvoffset;
+ unsigned char *running_avg_u =
+ denoiser->yv12_running_avg[INTRA_FRAME].u_buffer + recon_uvoffset;
+ unsigned char *mc_running_avg_v =
+ denoiser->yv12_mc_running_avg.v_buffer + recon_uvoffset;
+ unsigned char *running_avg_v =
+ denoiser->yv12_running_avg[INTRA_FRAME].v_buffer + recon_uvoffset;
+ int mc_avg_uv_stride = denoiser->yv12_mc_running_avg.uv_stride;
+ int avg_uv_stride = denoiser->yv12_running_avg[INTRA_FRAME].uv_stride;
+ int signal_stride = x->block[16].src_stride;
+ decision_u =
+ vp8_denoiser_filter_uv(mc_running_avg_u, mc_avg_uv_stride,
+ running_avg_u, avg_uv_stride,
+ x->block[16].src + *x->block[16].base_src,
+ signal_stride, motion_magnitude2, 0);
+ decision_v =
+ vp8_denoiser_filter_uv(mc_running_avg_v, mc_avg_uv_stride,
+ running_avg_v, avg_uv_stride,
+ x->block[20].src + *x->block[20].base_src,
+ signal_stride, motion_magnitude2, 0);
+ }
}
if (decision == COPY_BLOCK)
{
denoiser->yv12_running_avg[INTRA_FRAME].y_stride);
denoiser->denoise_state[block_index] = kNoFilter;
}
- // Option to selectively deblock the denoised signal.
+ if (denoiser->denoiser_mode != kDenoiserOnYOnly) {
+ if (decision_u == COPY_BLOCK) {
+ vp8_copy_mem8x8(
+ x->block[16].src + *x->block[16].base_src, x->block[16].src_stride,
+ denoiser->yv12_running_avg[INTRA_FRAME].u_buffer + recon_uvoffset,
+ denoiser->yv12_running_avg[INTRA_FRAME].uv_stride);
+ }
+ if (decision_v == COPY_BLOCK) {
+ vp8_copy_mem8x8(
+ x->block[20].src + *x->block[20].base_src, x->block[16].src_stride,
+ denoiser->yv12_running_avg[INTRA_FRAME].v_buffer + recon_uvoffset,
+ denoiser->yv12_running_avg[INTRA_FRAME].uv_stride);
+ }
+ }
+ // Option to selectively deblock the denoised signal, for y channel only.
if (apply_spatial_loop_filter) {
loop_filter_info lfi;
int apply_filter_col = 0;
projects / libvpx / blobdiff