Fix a threshold and a typo error.
Fix a threshold and a typo error.

danylaksono/openMVG,openMVG/openMVG,yoshidaken/openMVG,openMVG/openMVG,caymard/openMVG,danylaksono/openMVG,openMVG/openMVG,mojovski/openMVG,mojovski/openMVG,Vinzza/openMVG,Smozeley/openMVG,Smozeley/openMVG,openMVG/openMVG,poparteu/openMVG,poparteu/openMVG,yoshidaken/openMVG,mojovski/openMVG,Vinzza/openMVG,poparteu/openMVG,caymard/openMVG,openMVG/openMVG,Vinzza/openMVG,caymard/openMVG,danylaksono/openMVG,poparteu/openMVG,Smozeley/openMVG,yoshidaken/openMVG