contains 2310 observations of instances from 7 outdoor images
- Type
has 7 types of outdoor images, brickface, cement, foliage, grass, path, sky, and window.
- X1
the column of the center pixel of the region
- X2
the row of the center pixel of the region.
- X3
the number of pixels in a region = 9.
- X4
the results of a line extraction algorithm that counts how many lines of length 5 (any orientation) with low contrast, less than or equal to 5, go through the region.
- X5
measure the contrast of horizontally adjacent pixels in the region. There are 6, the mean and standard deviation are given. This attribute is used as a vertical edge detector.
- X6
X5 sd
- X7
measures the contrast of vertically adjacent pixels. Used for horizontal line detection.
- X8
sd X7
- X9
the average over the region of (R + G + B)/3
- X10
the average over the region of the R value.
- X11
the average over the region of the B value.
- X12
the average over the region of the G value.
- X13
measure the excess red: (2R - (G + B))
- X14
measure the excess blue: (2B - (G + R))
- X15
measure the excess green: (2G - (R + B))
- X16
3-d nonlinear transformation of RGB. (Algorithm can be found in Foley and VanDam, Fundamentals of Interactive Computer Graphics)
- X17
mean of X16
- X18
hue mean
Usage
data(image)