Jay, It seems like you might want to do the following: // Step 1 (load tiff) PlanarImage tiffImage = JAI.create( "fileload", "my.tiff" ); BufferedImage opaqueImg = tiffImage.getAsBufferedImage();
PlanarImage is a JAI class which you may or may not be familiar with. The RenderedOp returned by JAI.create() is a subclass of PlanarImage. The getAsBufferedImage() method on PlanarImage seems to do what you want. (Check out the JAI API doc for more info.) I'm not sure if this will entirely solve your problems, but it should give you a BufferedImage without having to write and re-read the file. Mike > -----Original Message----- > From: Jay Logan [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, August 28, 2002 7:46 PM > To: [EMAIL PROTECTED] > Subject: [JAVA2D] Fewer steps to convert TIFF into transparent PNG? > > > Hello. > I wanted to turn a TIFF image into a PNG image w/ transparent > background. > > I came up with a way, but it involves reading the image, > saving the image as PNG (w/o transparency), reading the image > back in again, and finally processing the image and resaving > the image w/ transparent background. > > > Here is my code: > > // Step 1 (load tiff) > RenderedImage tiffImage = JAI.create( "fileload", "my.tiff" ); > printInfoAbout( tiffImage ); > > try > { > // Step 2 (convert to png & save) > File tempPngFile = new File( "myTemp.png" ); > ImageIO.write( tiffImage, "png", tempPngFile ); // save as png. > BufferedImageOp transparentOp = new TransparentImageOp(); // mine > > // Step 3 (reload png & make transparent) > BufferedImage opaquePng = ImageIO.read( tempPngFile ); > BufferedImage transparentPng = transparentOp.filter( opaquePng, > null ); > > // Step 4 (save transparent png) > File pngFile = new File( "my.png" ); // with transparent > background. > ImageIO.write( transparentPng, "png", pngFile ); > } > catch ( IOException e ) > { > System.out.println ( "Exception caught: " + e.getMessage () ); > e.printStackTrace(); > } > > > Surely, there has to be a way to convert the image w/o going > through so many steps. > > In particular, there should be a way to manipulate the image > w/o saving and reloading it. I think my problem is that I > don't know how to make the BufferedImage out of the tiffImage > I created. I don't know which ColorModel to use, because the > ones that I do try end up with an IllegalArgumentException > being thrown at runtime. > > > Here is some info I took from the TIFF image: > > The image's dimensions: 1024x1024 > > This is the raster: ByteInterleavedRaster: width = 1024 height = 1024 > #numDataElements 1 > The roster is writable. > Translate X is: 0 > Translate Y is: 0 > > This is the sample model: > java.awt.image.PixelInterleavedSampleModel@1050000 > data type is: 0 (which is DataBuffer.TYPE_BYTE) > transfer type is: 0 (which is DataBuffer.TYPE_BYTE) > sample model width is: 1024 > sample model height is: 1024 > # of samples per pixel is: 1 > # of data elements is: 1 > sample sizes for model are: {8} > the band offsets are: 0 > > Here are some pixels from getPixels( 100, 100, 3, 10, (int [])null ): > 176, 176, 176, 183, 183, 176, 176, 176, 183, 176, > 176, 176, 176, 176, 176, 176, 176, 176, 176, 176, > 176, 176, 176, 176, 176, 176, 176, 176, 176, 176 > > A sample would be: 176 This corresponds to a black pixel. > > Could anyone help me? > Thanks in advance. > > P.S.: > When I try: > > BufferedImage opaqueImage = new BufferedImage( tiffImage.getWidth(), > tiffImage.getHeight(), > BufferedImage.TYPE_INT_RGB ); > opaqueImage.setData(tiffImage.getData()); // <-- get data from TIFF > > I get the following exception: > > java.lang.ArrayIndexOutOfBoundsException: 1024 > at > java.awt.image.SinglePixelPackedSampleModel.setPixels(SinglePi > xelPackedSampleModel.java:670) > > at java.awt.image.WritableRaster.setPixels(WritableRaster.java:547) > at > sun.awt.image.SunWritableRaster.setPixels(SunWritableRaster.java:132) > at java.awt.image.BufferedImage.setData(BufferedImage.java:1390) > at ImageTransformer.transformImages(ImageTransformer.java:208) > at ImageTransformer.main(ImageTransformer.java:34) > > > But the TIFF image is 1024 x 1024 pixels. That's what I don't > understand. > > Do you understand what is happening? > > ============================================================== > ============= > To unsubscribe, send email to [EMAIL PROTECTED] and > include in the body > of the message "signoff JAVA2D-INTEREST". For general help, > send email to > [EMAIL PROTECTED] and include in the body of the message "help". > =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA2D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
