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Small typo-fix

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Aitik Gupta 2020-11-14 08:17:44 +05:30
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doc/tutorials/videoio/video-input-psnr-ssim/video_input_psnr_ssim.markdown
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@ -131,7 +131,7 @@ For properties you can read and change look into the documentation of the @ref c
We want to check just how imperceptible our video converting operation went, therefore we need a We want to check just how imperceptible our video converting operation went, therefore we need a
system to check frame by frame the similarity or differences. The most common algorithm used for system to check frame by frame the similarity or differences. The most common algorithm used for
this is the PSNR (aka **Peak signal-to-noise ratio**). The simplest definition of this starts out this is the PSNR (aka **Peak signal-to-noise ratio**). The simplest definition of this starts out
from the *mean squad error*. Let there be two images: I1 and I2; with a two dimensional size i and from the *mean squared error*. Let there be two images: I1 and I2; with a two dimensional size i and
j, composed of c number of channels. j, composed of c number of channels.
\f[MSE = \frac{1}{c*i*j} \sum{(I_1-I_2)^2}\f] \f[MSE = \frac{1}{c*i*j} \sum{(I_1-I_2)^2}\f]