drawText | R Documentation |
Image
drawText
draws text over an Image
object.
This operation is destructive: it changes irreversibly the Image
object and cannot be undone.
drawText(
image,
text,
x,
y,
font_face = "simplex",
font_scale = 1,
italic = FALSE,
color = "red",
thickness = 1,
bl_orig = TRUE
)
image |
An |
text |
A character string representing the text to be drawn. |
x |
A numeric value representing the x coordinate of the bottom left
corner of the text string (or top left if |
y |
A numeric value representing the y coordinate of the bottom left
corner of the text string (or top left if |
font_face |
A character string representing the font type of the text (default: "simplex"). See notes for a list of available font types. |
font_scale |
A numeric value representing the scale factor by which the font-specific base size is multiplied (default: 1). |
italic |
A logical specifying whether the text should italicized (default: FALSE). |
color |
Any kind of R color specification compatible with
|
thickness |
A numeric value representing the thickness in pixels of the line (default: 1). |
bl_orig |
A logical specifying the origin of the text drawing (default: TRUE). If TRUE, the text is drawn right-side-up. If FALSE, it is drawn upside-down. |
This function does not return anything. It modifies image
in
place.
Simon Garnier, garnier@njit.edu
Image
, getTextSize
balloon <- image(system.file("sample_img/balloon1.png", package = "Rvision"))
drawText(balloon, "I'm a balloon", 50, 50, thickness = 3)
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