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#' Get the dominant colors present in images or videos
#'
#'
#' @param img_urls A string or character vector of URLs of images for which you want tags
#' @param meta Boolean that toggles whether or not you want the entire object. Default is FALSE.
#' When FALSE, the function returns just a data.frame of results
#'
#' @param \dots Additional arguments passed to \code{\link{clarifai_POST}}.
#'
#' @return Named list of length 3: \code{status_code}, \code{status_msg}, and \code{results}.
#' \code{results} is a named list of length 12. Contains information about max. and
#' min. image and video size allowed etc.
#'
#' Prints \code{status_msg} by default
#'
#' @export
#' @references \url{https://developer.clarifai.com/}
#'
#' @examples \dontrun{
#'
#' # Before calling the function, set API secret and id via secret_id(c("client_id", "secret"))
#' # and get token via get_token()
#'
#' get_color_urls("https://samples.clarifai.com/metro-north.jpg")
#' get_color_urls(c("https://samples.clarifai.com/metro-north.jpg",
#' "https://samples.clarifai.com/metro-north.jpg"))
#' }
get_color_urls <- function(img_urls = NULL, meta = FALSE, ...) {
if (is.null(img_urls)) stop("Please specify a valid image url.", call. = FALSE)
query <- as.list(img_urls)
names(query) <- rep("url", length(query))
color <- clarifai_POST(path="color/", query, ...)
if (color$status_code!="OK") {
print(color$status)
return(list())
}
if (!meta) return(color$results)
color
}
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