User Guide

Canvas 12 User Guide
Operation Explanation
Maximum Pixels in the image with a value greater than the specified constant are
replaced by the value.
Square root Destination pixel is equal to the square root of source pixel.
Square Destination pixel is equal to the square of source pixel.
Gamma Applies the function f(p) = (p/255)^gamma*255 to each pixel (p) in the
image or selection, where 0.1 <= gamma <= 5.0. For RGB images, this
function is applied to all three color channels. For 16-bit images, the
minimum and maximum are used for scaling instead of 255.
Log Applies the function f(p) = log(p) * 255/log(255) to each pixel (p) in the
image or selection. For RGB images, this function is applied to all three
color channels. For 16-bit images, the minimum and maximum are used
for scaling instead of 255.
Binary Logic
The Binary Logic Filter contains commands that perform bitwise operations or shift bits accordingly
within a pixel.
The Operation menu contains the following commands:
Operation Explanation
Or Performs a bitwise OR operation on a source pixel and an argument.
And Performs a bitwise AND operation on a source pixel and an argument.
Xor Performs a bitwise XOR operation on a source pixel and an argument.
Left Shift/Right Shift Performs a logical shift; it shifts all the bits in the pixel left or right
according to the value specified in edit box and inserts 0.
Colorize
The Colorize filter is used to assign colors or gradients to a chosen range of values. Depending on the
image type, 8-bit, 16-bit, or floating point (32-bit), you can use either absolute values or
percentages.
For floating point (32-bit) images, the Absolute values check box is automatically selected so you will
use Absolute values.
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