This is likely more precise and conveys the intent better.
Signed-off-by: Ganesh Ajjanagadde <gajjanaga...@gmail.com>
---
libavfilter/vf_ssim.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavfilter/vf_ssim.c b/libavfilter/vf_ssim.c
index ce1e3db..6b2a8d7 100644
--- a/libavfilter/vf_ssim.c
+++ b/libavfilter/vf_ssim.c
@@ -176,7 +176,7 @@ static float ssim_plane(SSIMDSPContext *dsp,
static double ssim_db(double ssim, double weight)
{
- return 10 * (log(weight) / log(10) - log(weight - ssim) / log(10));
+ return 10 * (log10(weight) - log10(weight - ssim));
}
static AVFrame *do_ssim(AVFilterContext *ctx, AVFrame *main,
--
2.6.2
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