For example, if you record a voice with a microphone\protect\footnote{credit fary54}:
\begin{enumerate}
- \item You record 15 seconds of background (without talking). This is represent the background noise that the filter uses as a reference..
+ \item You record 15 seconds of background (without talking). This is represent the background noise that the filter uses as a reference.
\item After 15 seconds, start the voice. This is represents the recording whose filter should remove the background noise.
\item You stop recording.
\item You place the FFT effect on the whole length of the recording (including the 15 seconds of background noise).
The most used type of modification is to create a \textit{S curve}. There can be a lot of shapes that use the S curve; the simplest is to create a control point in the shadows, one in the midtones (anchors) and one in the highlights. Moving the highlight point upwards and the shadow point downwards increases the contrast, making the image sharper and improving the color rendering. With the type of \textit{linear} curve you can make hard adjustments, similar to the result of the use of \textit{Color 3 Way}, even if this acts on the color wheel (Hue) while the curves act on individual RGB channels.
-The \textit{Polynomial} and \textit{Bézier} types introduce \textit{control handles} that allow for more sophisticated and smoother adjustments. The quality of the result is much better, but they require more experience for their optimal use. Extending the handles away from the control point increases the \textit{radius} of the curve at that point. By varying the angle of the handles we change the \textit{tangent} and thus the curvature of the curve below. The difference between Polynomial and Bézier lies in the underlying mathematics, but for practical purposes the use is similar.
+The \textit{Polynomial} and \textit{Bézier} types introduce \textit{control handles} that allow for more sophisticated and smoother adjustments. The quality of the result is much better, but they require more experience for their optimal use. By varying the angle of the handles we change the \textit{tangent} and thus the slope of the curve below. Unlike true Bezier curves, there is no effect in extending the handles: there is no change in the radius of the curve. The difference between Polynomial and Bézier lies in the underlying mathematics, but for practical purposes the use is similar. By default Bézier starts with a slight S-curve, as opposed to Polynomial.
Some examples of the use of curves to demonstrate the variety of possible interventions (figure~\ref{fig:ex-bezier}):
The \textit{Polar} effect bends and warps your video in weird ways. Mathematically, it converts your video from either \textit{polar} coordinates to \textit{rectangular} coordinates, or the reverse. With the Clear buttons we can bring the slider to default values without affecting the other parameters.
+\subsection{Posterize}%
+\label{sub:posterize}
+\index{posterize}
+
+Reduces the color depth so as to decrease the displayed color gradients, up to the bands typical of posterization. It is used by setting the number of \textit{steps} from 0 to 255.
+
\subsection{RGB-601}%
\label{sub:rgb-601}
\index{rgb-601}
\textit{Rate} allows you to choose the type of algorithm to use when switching between the start and end bands. You can reverse the direction with the \textit{Invers} button. The three modes are: \textit{Linear}, \textit{Log} or \textit{Quadratic} (exponential). This is a warping framework plugin based on this article: {\small \url{http://www.vision.huji.ac.il/videowarping/HUJI-CSE-LTR-2005-10_etf-tr.pdf}}
+\subsection{Timelapse Helper}%
+\label{sub:timelapse_helper}
+\index{timelapse helper}
+
+It is used to get a timelapse quickly and easily. It sets the number of frames to be skipped during playback. The default value of \textit{Number of Frames x block} is 10; playback (and rendering) displays frames 1 - 10 - 20 - ... and not the intermediate ones.
+
\subsection{Title}%
\label{sub:title}
\index{title}
The location for most User installs is:
-\hspace{4em}\texttt{<cinlib\_path>/plugins/}
+\hspace{4em}\texttt{<cinlib\_path>/plugins/video}
Location for some System installs is:
-\hspace{4em}\texttt{/usr/lib/cin/plugins/} (most ubuntu distros)
+\hspace{4em}\texttt{/usr/lib/cin/plugins/video} (most ubuntu distros)
-\hspace{4em}\texttt{/usr/lib64/cin/plugins/} (Leap distro)
+\hspace{4em}\texttt{/usr/lib64/cin/plugins/video} (Leap distro)
\subsection{How to Build OpenCV Plugins}%
\label{sub:how_build_opencv_plugins}
\subsubsection*{Time Stretch}%
\label{ssub:time_stretch}
+\subsubsection*{CD Ripper}%
+\label{ssub:cd_ripper}
+
+
\subsection{Rendered Video Effects}%
\label{sub:renederd_video_effets}
\item At the popup menu, enter the \textit{scale factor} $2$ to run twice as fast, and $0.5$ to run at half speed.
\end{itemize}
-\subsubsection*{CD Ripper}%
-\label{ssub:cd_ripper}
-
\subsubsection*{720 to 480}%
\label{ssub:720_to_480}
projects / goodguy / cin-manual-latex.git / blobdiff