inst/doc/cv2r_basic_usage.R

In battmanux/cv2r: Use OpenCV in RStudio

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library(reticulate)
library(cv2r)
install_opencv()

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img_url <- "https://upload.wikimedia.org/wikipedia/fr/4/4e/RStudio_Logo.png"

my_image <- imread(img_url)

# Very simple to plot images
imshow(mat=my_image)

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# Lets show the alpha mask
imshow(mat=my_image[,,4])

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# To use advances matrix subseting you shall convert the matrix to R 
my_r_image <- reticulate::py_to_r(my_image)
imshow(mat=my_r_image[50:300,200:900,c(4,2,2)])