Java Image Processing Troubles

[Tomdogggg]

I'm a beginner at integrating java into coldfusion. I have a component which will scale and crop an image, but I'd also like to run it through a color-filter to turn it grayscale. I've found methods but can't seem to get them to work, any tips?

P.S.: I'm using the 'java.awt.image' classes

[BKBK]

Could we see your methods in action?

[Tomdogggg]

<cffunction name="getFileObject" access="private" hint="Loads a file into memory so it's ready for manipulation">
<cfargument name="filePath" type="string" required="yes" hint="Absolute path the the file you'd like to load.">

<!--- Loading the file into memory--->
<cfset var result=CreateObject("java","java.io.File")>
<cfset result.init(filePath)>

<!---Return the file object to the caller function--->
<cfreturn result>
</cffunction>

<cffunction name="memberPicture" output="true" hint="Turns a file into the correct size, color, and format for the site.">
<cfargument name="sourcePath" type="string" required="yes" hint="Absolute path to the source image">
<cfargument name="destPath" type="string" required="yes" hint="Absolute path to the place you want to put the processed image.">
<cfargument name="new_width" type="numeric" required="no" default="220">
<!---Load class to hold the input image in--->
<cfset var ImageIO=CreateObject("java","javax.imageio.ImageIO")>
<!---Load class to hold the output image--->
<cfset var jbiDest=CreateObject("java","java.awt.image.BufferedImage")>
<!---Load class that will be transforming the image--->
<cfset var jatTransformer=CreateObject("java","java.awt.geom.AffineTransform")>

<!---Call our local function to create the input and destination file streams--->
<cfset var jFileIn=getFileObject(sourcePath)>
<cfset var jFileOut=getFileObject(destPath)>

<!---Load the input file into the imageIO object--->
<cfset var jbiSource=ImageIO.read(jFileIn)>


<!---See how big the input file is--->
<cfset var jFileIn_height=jbiSource.getHeight()>
<cfset var jFileIn_width=jbiSource.getWidth()>

<!---Figure out the scales for our output file--->
<cfset var scale=ARGUMENTS.new_width/jFileIn_width>
<cfset var jFileOut_height=jFileIn_height * scale>
<cfset var jFileOut_width=ARGUMENTS.new_width>

<!---Create a place to put the destination image object--->
<cfset jbiDest.init(JavaCast("int",jFileOut_width),JavaCast("int",jFileOut_height),jbiSource.getType())>

<!---Tell the transformer object how we want to transform the image--->
<cfset jatTransformer.setToScale(scale,scale)>

<!---User the transformer to transform the input file so that it's ready to be outputted--->
<cfset jbiDest.getGraphics().drawRenderedImage(jbiSource,jatTransformer)>

<!---Convert the image into a 'jpeg' format and save it to the desired destination--->
<cfset ImageIO.write(jbiDest, "jpeg", jFileOut)>

</cffunction>