final.tex

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\textbf{Question 1} & \emph{Lecture 1 \hfill Histograms and color}  \\ 
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From the RGB cube, the color plane defined by fixing the coordinate R to 1 (ie: R=1) looks like: 
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\textbf{\unchecked A:} Green, Blue, White \newline 


\textbf{\unchecked B:} Red, Purple, Black \newline 


\textbf{\unchecked C:} Red, Yellow, White \newline 


\textbf{\unchecked D:} Yellow, Purple, Black \newline 


\textbf{\unchecked E:} Yellow, Red, Black \newline 


\textbf{\unchecked F:} Red, Blue, Black \newline 


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\begin{tabular}{|p{8cm}@{\hskip 0.5cm}p{10.5cm}|} 
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\textbf{Question 2} & \emph{Lecture 1 \hfill Histograms and color}  \\ 
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\begin{tabular}{p{8cm}}
Consider these color pairs: RGB(1, 0, 0)-HSI(0, 1, 1); RGB(1, 1, 1)-HSI(0, 0, 1); RGB(0, 0, 0)-HSI(0, 0, 1); RGB(0, 0, 1)-HSI(0, 1, 1/3). How many pairs represents the same color? 
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\textbf{\unchecked A:} Only 1 pair \newline 


\textbf{\unchecked B:} 2 pairs \newline 


\textbf{\unchecked C:} 3 pairs \newline 


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\begin{tabular}{|p{8cm}@{\hskip 0.5cm}p{10.5cm}|} 
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\textbf{Question 3} & \emph{Lecture 1 \hfill Histograms and color}  \\ 
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\begin{tabular}{p{8cm}}
Using point processing on pixels with a typical 8-bit per channel RGB encoding, which operations do we need to apply to each channel to obtain an image with inverted colours? (x is the pixel from the input image) 
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\textbf{\unchecked A:} Subtract 255 from x \newline 


\textbf{\unchecked B:} Multiply x by -1 and add (255*3) \newline 


\textbf{\unchecked C:} Multiply x by -1 and add 255 \newline 


\textbf{\unchecked D:} Subtract 128 from x \newline 


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\begin{tabular}{|p{19cm}|} 
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\textbf{Question 4}\hfill \emph{Lecture 1 \hfill Histograms and color}  \\
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Open question: For this 3x4 intensity image and its pixel values. \newline\includegraphics[width=7cm,height=6cm,keepaspectratio]{example.png} \newline\newline Draw its histogram and apply histogram equalization. Give all the performed steps. \\ 
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