image_transparent_inverse

one or more colors you want 
want to keep unchanged.

color

color tolerance between 0 and 100.
Its length must be 1 or the same as <code>color</code>
 (which 
means you can have different fuzz values for 
different colors).
Suppose your color is white. If fuzz=0, then only 
white will be kept unchanged; if fuzz=10, colors 
similar to white will also kept unchanged.

fuzz

This function is an inverse version of 
<code>magick::image_transparent</code>.
While the latter makes certain colors 
transparent, the former keeps them 
unchanged and make others transparent.

An extension to 'ggplot2' and 'magick'. It contains
three groups of functions: Functions in the first group draw 'ggplot2' - based plots: geom_shading_bar() draws barplot
with shading colors in each bar. geom_rect_cm(), geom_circle_cm() and geom_ellipse_cm() draw rectangles, circles
and ellipses with centimeter as their unit. Thus their sizes do not change when the coordinate system or the aspect ratio
changes. annotation_transparent_text() draws labels with transparent texts. annotation_shading_polygon() draws irregular
polygons with shading colors. Functions in the second group generate coordinates for regular shapes and make linear transformations. Functions in the third group are 'magick' - based functions facilitating image processing.

image_transparent_inverse: Keep Certain Colors Unchanged and Make Others Transparent

Description

Usage

Arguments