 |
BUILT-IN MATHEMATICA SYMBOL
ReplaceImageValue
ReplaceImageValue[image, {x, y}->val]
changes the pixel values at position 
in image to val.
ReplaceImageValue[image, {xmin;;xmax, ymin;;ymax}->val]
changes the pixel values at positions that range from 
to 
to val.
ReplaceImageValue[image, {x, y}->val, "type"]
assumes val to be of the specified type.
Details and Options
- ReplaceImageValue assumes the standard image coordinate system, where x runs from
to width and y runs from 
to height. Image position 
corresponds to the bottom-left corner of the image. Other coordinate systems can be specified by setting the DataRange option. - Typical settings for DataRange include:
-
Automatic range 
, where a is the aspect ratio{{left,right},{bottom,top}} explicit coordinate ranges Full true pixel range 
- In 3D, ReplaceImageValue[image, {x, y, z}->val] assumes the standard 3D coordinate system, where x runs from
to width, y runs from 
to depth, and z runs from 0 to height. The position 
corresponds to the bottom-left front corner. - Use ReplacePixelValue to specify exact pixel positions with integer indices.
- In ReplaceImageValue[image, {x, y}->val], val can be a scalar, a list of channel values, or a color.
- ReplaceImageValue[image, {{x1, y1}->val1, ...}] can be used to set pixel values for multiple positions.
- ReplaceImageValue[image, {{x1, y1}, ...}->val] sets the pixel values for all specified positions to val.
- When the coordinate
lies on a boundary between pixels, all adjacent pixels are modified. - ReplaceImageValue[image, ...] typically gives an image that has the same type as image.
New in 9
