imageToDataFrame: Convert an image's pixels to a data.frame of RGB values.
In CulturalAnalytics: Functions for statistical analysis and plotting of image properties
Description
Usage
Arguments
Value
Examples
Description
This function converts the channels of a raster image to a
data.frame with red, green and blue columns. Each row of the
data.frame represents one pixel in the image. Rows of the image can be
accessed as ranges of rows in the data.frame.
This format is used by the palette and colour histogram functions.
Usage
1
Arguments
image
An RGB raster image.
Value
A data frame with columns named“red”,“green” and “blue”.
Examples
1
2
3
4
5
6
library(CulturalAnalytics)
library(jpeg)
imgdir<-paste(system.file(package = "CulturalAnalytics"), "images", sep = "/")
imgs<-paste(imgdir, dir(path = imgdir, pattern = ".jpg"), sep = "/")
img<-readJPEG(imgs[1])
rgbs<-imageToDataFrame(img)
CulturalAnalytics documentation built on May 2, 2019, 5:24 p.m.
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Description Usage Arguments Value Examples
Description
This function converts the channels of a raster image to a data.frame with red, green and blue columns. Each row of the data.frame represents one pixel in the image. Rows of the image can be accessed as ranges of rows in the data.frame.
This format is used by the palette and colour histogram functions.
Usage
1 |
Arguments
image |
An RGB raster image. |
Value
A data frame with columns named“red”,“green” and “blue”.
Examples
1 2 3 4 5 6 | library(CulturalAnalytics)
library(jpeg)
imgdir<-paste(system.file(package = "CulturalAnalytics"), "images", sep = "/")
imgs<-paste(imgdir, dir(path = imgdir, pattern = ".jpg"), sep = "/")
img<-readJPEG(imgs[1])
rgbs<-imageToDataFrame(img)
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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