Real-time feature extraction from video stream data for stream ...

ai.cs.uni.dortmund.de

Real-time feature extraction from video stream data for stream ...

Processor ColorToGrayscale

This processor converts a color image to a grayscale image.

Parameter Type Description Required

output String The name/key under which the output image is stored. If

this name equals the name of the input image, the input

image is going to be overwritten.

image String The name of the attribute that contains the byte array data

of the image.

Table .6.: Parameters of class ColorToGrayscale.

false

true

Processor Crop

This processor crops an image to a new size by cutting away parts of the image.

Parameter Type Description Required

output String Key/name of the attribute into which the output cropped

image is placed, default is ’frame:cropped’.

width int Width of the rectangle to crop, default is 10. false

height int Height of the rectangle to crop, default is 10. false

x int x coordinate of the lower-left corder of the rectangle for

cropping, defaults to 0.

y int y coordinate of the lower-left corder of the rectangle for

cropping, defaults to 0.

image String The name of the attribute that contains the byte array data

of the image.

Table .7.: Parameters of class Crop.

false

false

false

true

Processor DetectBrokenImage

This processor detects broken images and trows them away.

Parameter Type Description Required

threshold double The fraction of pixels that need to have the ’broken’ color

to mark this image as broken.

image String The name of the attribute that contains the byte array data

of the image.

Table .8.: Parameters of class DetectBrokenImage.

false

true

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