Transparent bitmaps have a discoloration during printing. InDesign

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• How can I resize a digital image using software of photo gallery to keep my digital images to be cut during printing on standard paper by a commercial processor? MP

  How can I resize a digital image using software of photo gallery to keep my digital images to be cut during printing on standard paper by a commercial processor? MP

  How can I resize a digital image using software of photo gallery to keep my digital images to be cut during printing on standard paper by a commercial processor? MP

  ====================================
  Sometimes the only resizing is not the answer because the
  the original size is different from the print size.

  You may need to crop photos to the size you want
  print to ensure that no clipping will occur. Cropping
  to a different aspect ratio will lose some parts of the picture but
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  Windows Live Photo Gallery is a cropping tool.

  Volunteer - MS - MVP - Digital Media Experience J - Notice_This is not tech support_I'm volunteer - Solutions that work for me may not work for you - * proceed at your own risk *.

• Solution to resize properly transparent bitmaps

  Hello everyone,

  Recently, I tried to use Bitmap.scaleInto () to resize the transparent bitmap images in my application. Although this feature is a nice addition to JDE 5, it tends to produce bad results on the transparent bitmaps such as PNG24 files. The Forum posts that I found on the web for this problem talk using Bitmap.createAlpha () which restores transparency, but still produces artifacts in the final bitmap as the white edges and colours of the wicked pixels.

  To resolve this problem without the use of an external library, I created the following function. He always uses scaleInto(), but in a different way. I added some comments in the service and created a screenshot showing the results before and after (don't worry about the photos, they are a part of this project, I am working currently on). I write the result here in the hope that it will help others looking to achieve the same thing. The code has been tested in JDE 5 and 6 of JDE and the sample photos have been created using different combinations of types of filters and reports l / h.

  package com.patchou.ui;import net.rim.device.api.system.Bitmap;import net.rim.device.api.ui.Color;import net.rim.device.api.ui.Graphics;/** * * @author    Patchou * @version   1.01 * */public class GPATools{    /**     * Resizes a bitmap with an alpha channel (transparency) without the artifacts introduced     *   by scaleInto().     *     * @param bmpSrc        Source Bitmap     * @param nWidth        New Width     * @param nHeight       New Height     * @param nFilterType   Filter quality to use. Can be Bitmap.FILTER_LANCZOS,     *                           Bitmap.FILTER_BILINEAR or     *                           Bitmap.FILTER_BOX.     * @param nAspectRatio  Specifies how the picture is resized. Can be     *                           Bitmap.SCALE_TO_FIT,     *                           Bitmap.SCALE_TO_FILL or     *                           Bitmap.SCALE_STRETCH.     * @return              The resized Bitmap in a new object.     */    public static Bitmap ResizeTransparentBitmap(Bitmap bmpSrc, int nWidth, int nHeight, int nFilterType, int nAspectRatio)    {        if(bmpsrc== null)            return null;
  
          //Get the original dimensions of the bitmap        int nOriginWidth = bmpSrc.getWidth();        int nOriginHeight = bmpSrc.getHeight();        if(nWidth == nOriginWidth && nHeight == nOriginHeight)            return bmpSrc;
  
          //Prepare a drawing bitmap and graphic object        Bitmap bmpOrigin = new Bitmap(nOriginWidth, nOriginHeight);        Graphics graph = Graphics.create(bmpOrigin);
  
          //Create a line of transparent pixels for later use        int[] aEmptyLine = new int[nWidth];        for(int x = 0; x < nWidth; x++)            aEmptyLine[x] = 0x00000000;        //Create two scaled bitmaps        Bitmap[] bmpScaled = new Bitmap[2];        for(int i = 0; i < 2; i++)        {            //Draw the bitmap on a white background first, then on a black background            graph.setColor((i == 0) ? Color.WHITE : Color.BLACK);            graph.fillRect(0, 0, nOriginWidth, nOriginHeight);            graph.drawBitmap(0, 0, nOriginWidth, nOriginHeight, bmpSrc, 0, 0);
  
              //Create a new bitmap with the desired size            bmpScaled[i] = new Bitmap(nWidth, nHeight);            if(nAspectRatio == Bitmap.SCALE_TO_FIT)            {                //Set the alpha channel of all pixels to 0 to ensure transparency is                //applied around the picture, if needed by the transformation                for(int y = 0; y < nHeight; y++)                    bmpScaled[i].setARGB(aEmptyLine, 0, nWidth, 0, y, nWidth, 1);            }
  
              //Scale the bitmap            bmpOrigin.scaleInto(bmpScaled[i], nFilterType, nAspectRatio);        }
  
          //Prepare objects for final iteration        Bitmap bmpFinal = bmpScaled[0];        int[][] aPixelLine = new int[2][nWidth];
  
          //Iterate every line of the two scaled bitmaps        for(int y = 0; y < nHeight; y++)        {            bmpScaled[0].getARGB(aPixelLine[0], 0, nWidth, 0, y, nWidth, 1);            bmpScaled[1].getARGB(aPixelLine[1], 0, nWidth, 0, y, nWidth, 1);
  
              //Check every pixel one by one            for(int x = 0; x < nWidth; x++)            {                //If the pixel was untouched (alpha channel still at 0), keep it transparent                if(((aPixelLine[0][x] >> 24) & 0xff) == 0)                    aPixelLine[0][x] = 0x00000000;                else                {                    //Compute the alpha value based on the difference of intensity                    //in the red channel                    int nAlpha = ((aPixelLine[1][x] >> 16) & 0xff) -                                    ((aPixelLine[0][x] >> 16) & 0xff) + 255;                    if(nAlpha == 0)                        aPixelLine[0][x] = 0x00000000; //Completely transparent                    else if(nAlpha >= 255)                        aPixelLine[0][x] |= 0xff000000; //Completely opaque                    else                    {                        //Compute the value of the each channel one by one                        int nRed = ((aPixelLine[0][x] >> 16 ) & 0xff);                        int nGreen = ((aPixelLine[0][x] >> 8 ) & 0xff);                        int nBlue = (aPixelLine[0][x] & 0xff);
  
                          nRed = (int)(255 + (255.0 * ((double)(nRed-255)/(double)nAlpha)));                        nGreen = (int)(255 + (255.0 * ((double)(nGreen-255)/(double)nAlpha)));                        nBlue = (int)(255 + (255.0 * ((double)(nBlue-255)/(double)nAlpha)));
  
                          if(nRed < 0) nRed = 0;                        if(nGreen < 0) nGreen = 0;                        if(nBlue < 0) nBlue = 0;                        aPixelLine[0][x] = nBlue | (nGreen<<8) | (nRed<<16) | (nAlpha<<24);                    }                }            }
  
              //Change the pixels of this line to their final value            bmpFinal.setARGB(aPixelLine[0], 0, nWidth, 0, y, nWidth, 1);        }        return bmpFinal;    }}
  

  Here's an example of how to call the function:

  Bitmap bmp = Bitmap.getBitmapResource("picture.png");Bitmap bmpResized = GPATools.ResizeTransparentBitmap(bmp, 30, 60,    Bitmap.FILTER_LANCZOS, Bitmap.SCALE_TO_FIT);
  

  Here is the result:

  

  Let me know if you find this useful, all comments are appreciated .

  Cyril

  Thank you . I made a minor adjustment to the code (to check if the size of the original image is identical to the desired size). For some reason, I can't edit my original post that I posted the latest version on my blog. Links: http://www.patchou.com/2010/10/resizing-transparent-bitmaps-with-the-blackberry-jde/ .

  Moderator note: I've updated the code in the original post to match the latest version.

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  Printer model no HP:

  Type of connectivity:

  OS version:

  　

  Although I am an employee of HP, I speak for myself and not for HP.

  　

  "Say thank you by clicking on the"

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