Previous Message | Next Message Previous in Topic | Next in Topic Previous by Same Author | Next by Same Author Previous Page (May 2002) | Back to Main IMAGEJ Page
	Reply | Post a New Message | Join or Leave IMAGEJ, or Change Options | Search
	Chronologically | Most Recent First | Wrap Text (Proportional Font) | Don't Wrap Text (Non-proportional Font)

Content-Type: text/plain; charset="us-ascii"
Message-ID:  <[log in to unmask]>
Date:         Mon, 27 May 2002 21:43:15 -0400
Reply-To:     ImageJ Interest Group <[log in to unmask]>
Sender:       ImageJ Interest Group <[log in to unmask]>
From:         Wayne Rasband <[log in to unmask]>
Subject:      Re: Automation of image import and length determination
In-Reply-To:  <[log in to unmask]>

At 03:00 PM 5/27/02 -0400, you wrote:
>Hello,
>
>My current project involves capturing an image every few seconds and saving
>each image as a separate file in a specified folder.  I want ImageJ to
>import each image file as soon as it appears in the folder (for further
>real-time processing).  Is there a way to do this?

Here is a plugin that opens and processes captured images as they appear in a folder. The images are expected to have names in the form frame000.tif, frame001.tif, etc. The path, name, number of digits and suffix can be changed by editing the plugin.

-wayne

/************* Sequence_Processor.java *************/
import ij.*;
import ij.process.*;
import ij.gui.*;
import java.awt.*;
import ij.plugin.*;
import ij.io.*;

public class Sequence_Processor implements PlugIn {
    String path = "C:\\images\\";
    String name = "frame";
    String suffix = ".tif";
    int nDigits = 3;
    int maxTime = 60*1000;  // 60 seconds
    int maxFrames = 1000;

    public void run(String arg) {
        IJ.run("Set Measurements...", "area mean min display decimal=2");
        for (int i=0; i<maxFrames; i++) {
            ImagePlus imp = openFrame(i);
            if (imp!=null)
                processFrame(i, imp);
            else
                break;
        }
    }

    ImagePlus openFrame(int i) {
        String digits = ""+i;
        while (digits.length()<nDigits)
            digits = "0"+digits;
        String file = path+name+digits+suffix;
        IJ.showStatus("opening "+file);
        long start = System.currentTimeMillis();
        ImagePlus imp = null;
        Opener opener = new Opener();
        do {
            if (System.currentTimeMillis()>start+maxTime) {
                IJ.showMessage("Sequence Processor", "Unable to open\n"
                    +file+"\n"
                    +"after trying for "+(maxTime/1000)+" seconds.");
                break;
            }
            imp = opener.openImage(file);
            IJ.wait(100);
        } while (imp==null);
        return imp;
    }

    void processFrame(int i, ImagePlus imp) {
        imp.show();
        IJ.run("Measure");
        imp.getWindow().close();
    }

}

Center for Information Technology National Institutes of Health Bethesda, Maryland 20892 301 594 6248 (v) 301 496 8294 (TDD) Comments and Assistance Accessibility