CImage:Log

CImage:Log

The Log method computes the base e logarithm of the pixel values.

Syntax

bResult = CImage:Log()

On success, this method returns true
On failure, this method returns false.

Remarks

The Log operation can produce a log of a negative number error if the pixel values are 0 or less. Mira traps this case and assigns a resultant value to the pixel as defined by the SetMathErrVal method.

Example

The following script fragment loads an image from the file sPath, computes the log-e of all the pixels, and saves the result back to the file:

I = CImage:new()	-- create a new CImage
I:Open(sPath)	-- load the image from a file named sPath
I:Log()	-- perform the operation
I:Save()