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vp9: Update to skin detection.

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For model=1, use higher threshold on luminance, conditioned
on the skin cluster distance.

Change-Id: I971bccdef7b92b2aeef60af90a8e48b98716a89b
This commit is contained in:
Marco 2016-03-10 15:43:42 -08:00
parent 11bf7ea354
commit c3d6da666e
1 changed files with 7 additions and 7 deletions
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14
vp9/encoder/vp9_skin_detection.c
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@ -62,16 +62,16 @@ int vp9_skin_pixel(const uint8_t y, const uint8_t cb, const uint8_t cr) {
// Exit on very strong cb.
if (cb > 150 && cr < 110)
return 0;
// Exit on (another) low luminance threshold if either color is high.
if (y < 50 && (cb > 140 || cr > 140))
return 0;
for (; i < 5; i++) {
if (evaluate_skin_color_difference(cb, cr, i) < skin_threshold[i + 1]) {
return 1;
int skin_color_diff = evaluate_skin_color_difference(cb, cr, i);
if (skin_color_diff < skin_threshold[i + 1]) {
if (y < 60 && skin_color_diff > 3 * (skin_threshold[i + 1] >> 2))
return 0;
else
return 1;
}
// Exit if difference is much large than the threshold.
if (evaluate_skin_color_difference(cb, cr, i) >
(skin_threshold[i + 1] << 3)) {
if (skin_color_diff > (skin_threshold[i + 1] << 3)) {
return 0;
}
}