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Code Issues Releases Activity

avfilter/vf_chromakey: fix formula for calculation of difference

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This commit is contained in:
Paul B Mahol 2020-05-16 19:48:17 +02:00
parent 8b0575d763
commit 5646d02cb3
1 changed files with 2 additions and 2 deletions
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4
libavfilter/vf_chromakey.c
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@ -56,7 +56,7 @@ static uint8_t do_chromakey_pixel(ChromakeyContext *ctx, uint8_t u[9], uint8_t v
du = (int)u[i] - ctx->chromakey_uv[0]; du = (int)u[i] - ctx->chromakey_uv[0];
dv = (int)v[i] - ctx->chromakey_uv[1]; dv = (int)v[i] - ctx->chromakey_uv[1];
diff += sqrt((du * du + dv * dv) / (255.0 * 255.0)); diff += sqrt((du * du + dv * dv) / (255.0 * 255.0 * 2));
} }
diff /= 9.0; diff /= 9.0;
@ -78,7 +78,7 @@ static uint16_t do_chromakey_pixel16(ChromakeyContext *ctx, uint16_t u[9], uint1
du = (int)u[i] - ctx->chromakey_uv[0]; du = (int)u[i] - ctx->chromakey_uv[0];
dv = (int)v[i] - ctx->chromakey_uv[1]; dv = (int)v[i] - ctx->chromakey_uv[1];
diff += sqrt((du * du + dv * dv) / (max * max)); diff += sqrt((du * du + dv * dv) / (max * max * 2));
} }
diff /= 9.0; diff /= 9.0;