plot_image {ExpImage}

Esta funcao plota imagens. (This function plot the images.)

Description

Esta funcao permite plotar a imagem (This function allows you to view the image).

Usage

plot_image(im,r=1,g=2,b=3,band=NULL,col=0,normalize=FALSE,axis=FALSE,
       lim=NULL,title=NULL,flip=TRUE,flop=FALSE,rotate=0,norm=1,
       rasterRGB=FALSE)

Arguments

im

Este objeto deve conter uma imagem no formato do EBImage ou na forma de uma matriz, no caso de imagem em escala de cinza (This object must contain an image in EBImage format).

r

Indica o canal correspondente a cor vermelha para imagens com extensao '.tif'. O defaut e 1. (Indicates the channel corresponding to red color for images with the extension '.tif'. The default is 1.)

g

Indica o canal correspondente a cor verde para imagens com extensao '.tif'. O defaut e 2. (Indicates the channel corresponding to green color for images with the extension '.tif'. The default is 2.)

b

Indica o canal correspondente a cor azul para imagens com extensao '.tif'. O defaut e 3. (Indicates the channel corresponding to blue color for images with the extension '.tif'. The default is 3.)

band

Indica a banda que se deseja plotar. Neste caso nao se precisa considerar as bandas de R, G e B simultaneamente.

col

Pode ser um valor numerico variando entre 0 e 8 ou uma paleta de cores obtida pela funcao 'colorRampPalette'. Se for 0 sera considerada a representacao da imagem monocromatica em escala de cinza. Valores entre 1 e 6 indicam outras paletas de cores para a representacao. (It can be a numerical value ranging from 0 to 6 or a color palette 'obtained by the 'colorRampPalette' function. If it is 0, the representation of the monochromatic image in gray scale will be considered. Values between 1 and 6 indicate other color palettes for the representation. )

normalize

Se for TRUE a imagem sera normalizada para que os valores dos pixels variem entre 0 e 1 (If TRUE, the image will be normalized so that the pixel values vary between 0 and 1).

axis

Se for FALSE nao aparecera os eixos no grafico (If it is FALSE, the axes will not appear in the graph)

lim

Vetor contendo quatro valores correspondentes aos limites que apareceral nos eixos do grafico (Vector containing four values corresponding to the limits that will appear on the graph axes)

title

Titulo do grafico (chart title).

flip

Inverter a imagem (invert the image)

flop

Inverter a imagem (invert the image)

rotate

Valor numerico com o angulo para a rotacao da imagem (Numeric value with angle for image rotation)

norm

Numero pelo qual os valores dos pixels deverao ser divididos para variar entre 0 e 1 (Number by which pixel values should be divided to vary between 0 and 1).

rasterRGB

Se a imagem for em TIF com uma unica banda deve ser FALSE. Se houver 3 ou mais bandas deve ser TRUE (If the image is in TIF with a single band it must be FALSE. If there are 3 or more bands it must be TRUE).

Value

Apresenta a imagem contida no objeto im.

Author(s)

Alcinei Mistico Azevedo (Instituto de ciencias agrarias da UFMG)

See Also

read_image

Examples

#library(ExpImage)
#library(EBImage)
#Carregar imagem de exemplo
im=read_image(example_image(2),plot=FALSE)
im=resize_image(im,w = 300,plot = FALSE)
plot_image(im)

#Representado imagens em escalas de cinza
im2 = gray_scale(im,"r")
plot_image(im2)
## Not run: 
# Not run: Depende da interacao com uma interface grafica
#(It depends on interaction with a graphical interface).

#Utilizando uma paleta de cores para a melhor visualizacao
plot_image(im2,col=2)
plot_image(im2,col=3,axis=TRUE)






#########################################################
#########################################################
#' #' ########################################################
###' Abrindo o endereco de bandas de imagens de satelite
########################################################
end1=example_image(14) #Banda de azul
end2=example_image(15) #Banda de verde
end3=example_image(16) #Banda de vermelho
end4=example_image(17) #Banda de IR
end5=example_image(18) #Banda de SWIR

########################################################
###' Abrindo bandas de imagens de satelite
########################################################
B1=read_image(end1,plot=TRUE)
B2=read_image(end2,plot=TRUE)
B3=read_image(end3,plot=TRUE)
B4=read_image(end4,plot=TRUE)
B5=read_image(end5,plot=TRUE)

########################################################
###' Juntando as bandas em uma imagem
########################################################
im=join_bands(imgs = list(B1,B2,B3,B4,B5))
tif_info(im)
plot_image(im,r=3,g=2,b=1,rasterRGB=TRUE)

## End(Not run)