ref: ee380cc5c4f5e89d20597919eac93a2506fe330e
parent: f1d090e2f56e28b3218fb99f648bd5d59ae2f4b1
author: Marco <[email protected]>
date: Mon Aug 24 10:59:54 EDT 2015
vp8: modifcatiion to skin map computation. For each block in pickinter: use average of four middle pixels (instead of single pixel) to set skin map. This can help a little in reducing false skin detection in some cases. Change-Id: Ic247af75e9c2948b08ab977a39e061adacd8ec97
--- a/vp8/encoder/pickinter.c
+++ b/vp8/encoder/pickinter.c
@@ -813,9 +813,18 @@
// Check if current macroblock is in skin area.
{
- const int y = x->src.y_buffer[7 * x->src.y_stride + 7];
- const int cb = x->src.u_buffer[3 * x->src.uv_stride + 3];
- const int cr = x->src.v_buffer[3 * x->src.uv_stride + 3];
+ const int y = (x->src.y_buffer[7 * x->src.y_stride + 7] +
+ x->src.y_buffer[7 * x->src.y_stride + 8] +
+ x->src.y_buffer[8 * x->src.y_stride + 7] +
+ x->src.y_buffer[8 * x->src.y_stride + 8]) >> 2;
+ const int cb = (x->src.u_buffer[3 * x->src.uv_stride + 3] +
+ x->src.u_buffer[3 * x->src.uv_stride + 4] +
+ x->src.u_buffer[4 * x->src.uv_stride + 3] +
+ x->src.u_buffer[4 * x->src.uv_stride + 4]) >> 2;
+ const int cr = (x->src.v_buffer[3 * x->src.uv_stride + 3] +
+ x->src.v_buffer[3 * x->src.uv_stride + 4] +
+ x->src.v_buffer[4 * x->src.uv_stride + 3] +
+ x->src.v_buffer[4 * x->src.uv_stride + 4]) >> 2;
x->is_skin = 0;
if (!cpi->oxcf.screen_content_mode)
x->is_skin = is_skin_color(y, cb, cr);