Displaying 5 results from an estimated 5 matches for "imread".
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immread
2002 Feb 20
3
importing images
I would like to import "tif" images in R and I do not find any
function that can do that. In Matlab there exists the function "imread"
that can read the most known images format. Does a similar function
exist for R ?
Thanks in advance
--
Herve CARDOT
____________________________________________________________
Unite Biometrie et Intelligence Artificielle, INRA Toulouse
BP 27, 31326 Castanet-Tolosan cedex, France.
Tel:...
2009 Jul 23
1
Re ading Image Files
Hello, I'm rather new to R and I want to do some image analysis. Is there a
way to read jpeg files into a matrix like matlab's imread?
--
View this message in context: http://www.nabble.com/Reading-Image-Files-tp24619129p24619129.html
Sent from the R help mailing list archive at Nabble.com.
2012 Nov 08
2
unable to load shared object - opencv
...t;
#include <opencv/cv.h>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv/highgui.h>
#include <opencv/cv.h>
#include <R.h>
#include <Rinternals.h>
extern "C" SEXP provaR(void) {
cv::Mat gravit;
gravit=cv::imread("imm.jpg");
cv::imwrite("imm_dop.jpg",gravit);
Rprintf("Hello, World!nn");
return R_NilValue;
}
Now in the terminal i type R CMD SHLIB prova2.cpp to create the file
prova2.so and this happen without error.
In R i type dyn.load("prova2.so") and get this er...
2010 Mar 24
3
help in matlab - r code
...onverts the image to grayscale data (line 3), and calculates the
autocorrelation curve
# for offset distances of one pixel to 99 pixels (lines 7–10). This code can
be used to
# perform steps (4) and (6) listed above in the Summary of Steps to
Calculate Grain
# Size of Natural Sediment.
ColorData = imread(‘ImageName.jpg’); x <- read.jpeg("sed2.jpg")# opens the
image
imshow(ColorData); plot(x) # plot image
data = double(rgb2gray(ColorData)); x=rgb2grey(x) # transform in grayscale,
the image
; # example of a similar data matrix: data =
double(0.54878431372549,0.468,0.553411764705882,0.663...
2011 Aug 26
0
Problem in calling R functions from Matlab
...?? 'graphics'
??? 'grDevices'
??? 'utils'
??? 'datasets'
??? 'methods'
??? 'base'
b =???? 1
c =???? ''
As it shows that rgdal library is loaded, also the rscproxy library is loaded, in addition to all others. I tried following:
imshow(imread('testimg_p.tif')) displays the image properly, however calling this from R using rgdal from within Matlab gives error;
>> [a b c] = evalR('img <- readGDAL("testimg_p.tif")')
a = ?????[]
b = ?????0
c = Invoke Error, Dispatch Exception: Object is static; operati...