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Encode image to Base64

Usage

encode_image(file_path)

Arguments

file_path

Path to an image file

Value

A character string containing a base64-encoded data URI (e.g., "data:image/png;base64,..."), or NULL with a warning if encoding fails.

Examples

img <- system.file("extdata/rectLight.png", package = "hexsession")
encode_image(img)
#> [1] "data:image/png;base64,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"