PDA example: Reading a jpeg file into a picture control

Hi
Does anybody have a simple PDA example of how to read a .jpg file and show it in a picture control. The jpg examples I've found does not compile for PDA.

Evan wrote in message news:<[email protected]>...
> In LabVIEW for windows there are VIs to read in JPEGs, however the PDA
> module does not support those VIs, so I do not believe there is a way
> to display JPEGs.
The hard way would be to write your own JPEG -> Bitmap / Array
de-compression routine. You will probably find example (C++) code at
the JPEG web site.
http://www.jpeg.org/jpeg_about.html

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Hi, I have been dragging jpeg files into i-movie all week without issue. Now all of a sudden, the selection of jpegs I'm dragging is repeating certain photos and not featuring others, making the entire sequence impossible to view.
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It worked! Thank you! I finally just finished about 20 minutes ago! It took over 26 hours to complete the process you described, but I stuck with it and it worked. I am glad I didn't give up or "forget it" as some might have suggested. That would have set me back until tomorrow!
Ultimately, it turned out there were 45,910 jpgs created. No wonder it took so many hours to render/display them all. It ended up being about 10 hours before it seemed they were all rendered but the process between them displaying and being able to start really deleting them took a few hours because partly I was asleep and also partly it took forever to do anything. Any action as simple as selecting and right-clicking to Get Info, or emptying the trash, would take 20-30 minutes, a couple times longer. The clock stopped many times for 20-30 minutes at a time, a few times over 30 minutes, before catching back up. My cursor never froze which is what really kept me going, although it was a spinning beach ball for most of the time. I was never so relieved to see my regular cursor as opposed to seeing a spinning beach ball as I was early this morning after about 10 hours!
Once I was able to open a Finder window and select all 45,900 files (I had already deleted 10 in the previous couple hours during experimenting of trying to figure out what would work best), then right-click and select to move all the files to the trash, the process of moving them to the trash took 4.5 hours. Then deleting them from the trash took a couple minutes. There were 21.4 GB!!! No wonder the whole process took 26 hours!
mende1, thank you so much!

How to convert a jpeg file into a 1-bit bmp file (2 colors image)

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Hi opalo,
this code may help you...
import java.awt.*;
import java.io.*;
import java.awt.image.*;
import javax.imageio.ImageIO;
class Write1 extends Component {
//--- Private constants
private final static int BITMAPFILEHEADER_SIZE = 14;
private final static int BITMAPINFOHEADER_SIZE = 40;
//--- Private variable declaration
//--- Bitmap file header
private byte bitmapFileHeader [] = new byte [14];
private byte bfType [] = {'B', 'M'};
private int bfSize = 0;
private int bfReserved1 = 0;
private int bfReserved2 = 0;
private int bfOffBits = BITMAPFILEHEADER_SIZE + BITMAPINFOHEADER_SIZE;
//--- Bitmap info header
private byte bitmapInfoHeader [] = new byte [40];
private int biSize = BITMAPINFOHEADER_SIZE;
private int biWidth = 50;
private int biHeight = 70;
private int biPlanes = 1;
//private int biBitCount = 24;
private int biBitCount = 1;
private int biCompression = 0;
private int biSizeImage = 0x030000;
private int biXPelsPerMeter = 0x0;
private int biYPelsPerMeter = 0x0;
private int biClrUsed = 0;
private int biClrImportant = 0;
//--- Bitmap raw data
private int bitmap [];
//--- File section
private FileOutputStream fo;
//--- Default constructor
public Write1() {
public void saveBitmap (String parFilename, Image parImage, int
parWidth, int parHeight) {
try {
fo = new FileOutputStream (parFilename);
save (parImage, parWidth, parHeight);
fo.close ();
catch (Exception saveEx) {
saveEx.printStackTrace ();
* The saveMethod is the main method of the process. This method
* will call the convertImage method to convert the memory image to
* a byte array; method writeBitmapFileHeader creates and writes
* the bitmap file header; writeBitmapInfoHeader creates the
* information header; and writeBitmap writes the image.
private void save (Image parImage, int parWidth, int parHeight) {
try {
convertImage (parImage, parWidth, parHeight);
writeBitmapFileHeader ();
writeBitmapInfoHeader ();
writeBitmap ();
catch (Exception saveEx) {
saveEx.printStackTrace ();
* convertImage converts the memory image to the bitmap format (BRG).
* It also computes some information for the bitmap info header.
private boolean convertImage (Image parImage, int parWidth, int parHeight) {
int pad;
bitmap = new int [parWidth * parHeight];
PixelGrabber pg = new PixelGrabber (parImage, 0, 0, parWidth, parHeight,
bitmap, 0, parWidth);
try {
pg.grabPixels ();
catch (InterruptedException e) {
e.printStackTrace ();
return (false);
pad = (4 - ((parWidth * 3) % 4)) * parHeight;
biSizeImage = ((parWidth * parHeight) * 3) + pad;
bfSize = biSizeImage + BITMAPFILEHEADER_SIZE +
BITMAPINFOHEADER_SIZE;
biWidth = parWidth;
biHeight = parHeight;
return (true);
* writeBitmap converts the image returned from the pixel grabber to
* the format required. Remember: scan lines are inverted in
* a bitmap file!
* Each scan line must be padded to an even 4-byte boundary.
private void writeBitmap () {
int size;
int value;
int j;
int i;
int rowCount;
int rowIndex;
int lastRowIndex;
int pad;
int padCount;
byte rgb [] = new byte [3];
size = (biWidth * biHeight) - 1;
pad = 4 - ((biWidth * 3) % 4);
if (pad == 4) // <==== Bug correction
pad = 0; // <==== Bug correction
rowCount = 1;
padCount = 0;
rowIndex = size - biWidth;
lastRowIndex = rowIndex;
try {
for (j = 0; j < size; j++) {
value = bitmap [rowIndex];
rgb [0] = (byte) (value & 0xFF);
rgb [1] = (byte) ((value >> 8) & 0xFF);
rgb [2] = (byte) ((value >> 16) & 0xFF);
fo.write (rgb);
if (rowCount == biWidth) {
padCount += pad;
for (i = 1; i <= pad; i++) {
fo.write (0x00);
int b = 1200;
fo.write(b);
rowCount = 1;
rowIndex = lastRowIndex - biWidth;
lastRowIndex = rowIndex;
else
rowCount++;
rowIndex++;
//--- Update the size of the file
bfSize += padCount - pad;
biSizeImage += padCount - pad;
catch (Exception wb) {
wb.printStackTrace ();
* writeBitmapFileHeader writes the bitmap file header to the file.
private void writeBitmapFileHeader () {
try {
fo.write (bfType);
fo.write (intToDWord (bfSize));
fo.write (intToWord (bfReserved1));
fo.write (intToWord (bfReserved2));
fo.write (intToDWord (bfOffBits));
catch (Exception wbfh) {
wbfh.printStackTrace ();
* writeBitmapInfoHeader writes the bitmap information header
* to the file.
private void writeBitmapInfoHeader () {
try {
fo.write (intToDWord (biSize));
fo.write (intToDWord (biWidth));
fo.write (intToDWord (biHeight));
fo.write (intToWord (biPlanes));
fo.write (intToWord (biBitCount));
fo.write (intToDWord (biCompression));
fo.write (intToDWord (biSizeImage));
fo.write (intToDWord (biXPelsPerMeter));
fo.write (intToDWord (biYPelsPerMeter));
fo.write (intToDWord (biClrUsed));
fo.write (intToDWord (biClrImportant));
// DataOutputStream temp = new DataOutputStream(fo);
// int m = 32;
// temp.writeInt(m);
catch (Exception wbih) {
wbih.printStackTrace ();
* intToWord converts an int to a word, where the return
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byte retValue [] = new byte [2];
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retValue [1] = (byte) ((parValue >> 8) & 0x00FF);
return (retValue);
* intToDWord converts an int to a double word, where the return
* value is stored in a 4-byte array.
private byte [] intToDWord (int parValue) {
byte retValue [] = new byte [4];
retValue [0] = (byte) (parValue & 0x00FF);
retValue [1] = (byte) ((parValue >> 8) & 0x000000FF);
retValue [2] = (byte) ((parValue >> 16) & 0x000000FF);
retValue [3] = (byte) ((parValue >> 24) & 0x000000FF);
return (retValue);
class Writebmp
     public static void main(String args[])
          //Image img = Toolkit.getDefaultToolkit().getImage("jatin.bmp");
          try
          File filename = new File("jatin_test.bmp");
          BufferedImage image = ImageIO.read(filename);
          Graphics graphics = image.getGraphics();
          graphics.drawString("उजगर",10,30);
          Write1 w = new Write1();
          Image img = Toolkit.getDefaultToolkit().getImage("jatin_test.bmp");
          w.saveBitmap("jatin_test.bmp",img,200,200);
          catch (IOException e)
System.err.println ("Unable to write to file");
System.exit(-1);
}

Suddenly my Nikon Coolpix will not upload onto my 09 iphoto it takes for ever then it just shows blank squares no pics and a message that states it cannot read the JPEG files. Can anyone help me, please.

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PDA example: Reading a jpeg file into a picture control

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