MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guide de l'utilisateur télécharger pdf (Page 219)

Pixel Statistics

10 UsetheReshapeblockstotransformtherowvectorsoutputfromtheBus

Selector block into columns vectors. Set the Output dimensionality

parameters to

Column vector (2-D).

11 Use the Matrix Concatenation block to concatenate the R, G, and B column

vectors into a single matrix so they can be displayed using the Vector Scope

block. Set the Number of inputs parameter to

12 Use the Vector Scope b lock to display the histograms of the R, G, and B

values of the input image. Set the block parameters as follows:

• Scope Properties pane, Input domain =

User-defined

• Display Properties pane, clear the Frame number check box

• Display Properties pane, select the Channel legend check b ox

• Display Properties pane, select the Compact display check box

• Axis Properties pane, clear the Inherit sample i ncrement from

input check box.

• Axis Properties pane, Minimum Y-limit =

• Axis Properties pane, Maximum Y-limit = 1

• Axis Properties pane, Y-axis title = Count

• Line Properties pane, Line markers = .|s|d

• Line Properties pane, Line colors = [1 0 0]|[0 1 0]|[ 0 0 1]

13 Connect the blocks as shown in the following figure.

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MATLAB VIDEO AND IMAGE PROCESSING BLOCKSET 3 Guide de l'utilisateur Page 219