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more perceptual optimisation

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minjaesong
2025-09-22 14:45:59 +09:00
parent 4851f61c56
commit e001445095
5 changed files with 442 additions and 248 deletions
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12
video_encoder/encoder_tav.c
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@@ -152,8 +152,8 @@ static const int QUALITY_CG[] = {240, 180, 120, 60, 30, 5};
static const float ANISOTROPY_MULT[] = {1.8f, 1.6f, 1.4f, 1.2f, 1.0f, 1.0f};
static const float ANISOTROPY_BIAS[] = {0.2f, 0.1f, 0.0f, 0.0f, 0.0f, 0.0f};
static const float ANISOTROPY_MULT_CHROMA[] = {2.4f, 2.2f, 2.0f, 1.7f, 1.4f, 1.0f};
static const float ANISOTROPY_BIAS_CHROMA[] = {0.4f, 0.3f, 0.2f, 0.1f, 0.0f, 0.0f};
static const float ANISOTROPY_MULT_CHROMA[] = {6.6f, 5.5f, 4.4f, 3.3f, 2.2f, 1.1f};
static const float ANISOTROPY_BIAS_CHROMA[] = {1.0f, 0.8f, 0.6f, 0.4f, 0.2f, 0.0f};
// DWT coefficient structure for each subband
typedef struct {
@@ -821,7 +821,7 @@ static float perceptual_model3_HL(int quality, float LH) {
}
static float perceptual_model3_HH(float LH, float HL) {
return 2.f * (LH + HL) / 3.f;
return (HL / LH) * 1.44f;
}
static float perceptual_model3_LL(int quality, int level) {
@@ -913,15 +913,15 @@ static float get_perceptual_weight(tav_encoder_t *enc, int level, int subband_ty
if (!is_chroma) {
// LL subband - contains most image energy, preserve carefully
if (subband_type == 0)
return perceptual_model3_LL(enc->quality_level, level + 1);
return perceptual_model3_LL(enc->quality_level, level);
// LH subband - horizontal details (human eyes more sensitive)
float LH = perceptual_model3_LH(enc->quality_level, level + 1);
float LH = perceptual_model3_LH(enc->quality_level, level);
if (subband_type == 1)
return LH;
// HL subband - vertical details
float HL = perceptual_model3_HL(enc->quality_level, LH + 1);
float HL = perceptual_model3_HL(enc->quality_level, LH);
if (subband_type == 2)
return HL * (level == 2 ? TWO_PIXEL_DETAILER : level == 3 ? FOUR_PIXEL_DETAILER : 1.0f);