How to overlay color image over a grayscale image without IMAQ?
I would like to display a color image over a grayscale image; I would like the color image look translucent. How would I do this without using IMAQ functions? I am currently displaying my grayscale image using Intensity Graph.
> I would like to display a color image over a grayscale image; I would
> like the color image look translucent. How would I do this without
> using IMAQ functions? I am currently displaying my grayscale image
> using Intensity Graph.
Transparency and overlays are really just arithmetic on the images. It
is either done by the windowing system or by you. At the moment you
can't set transparency on LV controls. You can set it on LV floating
windows on some OSes, but then you will need to have the windows lined up.
A more direct approach is to lighten or darken the color image elements
based upon whether they will display over white, black, or a shade of
gray. If the images don't have the same size pixels, this will have a
first step of resampling th
e images so they do. Then combine the pixels
using the transparency you were going to apply to the color and the
shade of gray beneath it. I'm being vague here because there are lots
of physical models for combining colors.
If I look in my paint program I see about fifteen, so this is where you
get to make a choice and decide if black behind a red pixel is black, or
dark red. It all depends on whether these are two transparent
images(acetate sheets) backlit, or is it a transparency over a
nontransmitting media like paper. Anyway, if you can be more specific
about what you want, none of this is hard, typically just scaling the
int32s, adding, and some sort of normalization.
Greg McKaskle
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So I am beginning to work this all out...
I have cropped an image using motion which is looking great, except that the image (which is someone's head) is square because I used 'crop' in motion, any ideas how to make the edges curved?
The next step is working out how to keep the superimposed image over the head of the person in the video if they move? ie so it tracks the original image in movement?
Thank you all for your help so far, I never expected help like this so quickly!Hard to follow you when you're creating new threads on the same topic...
First of all - don't use Motion to crop - that's easily done in FCP - if you want to follow the edges of the head, use the Mask tool in Motion.
Second, there's a video tutorial for using the tracking tools in Motion here:
http://motionsmarts.com/
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Re: How to display Graphical objects over streaming video images??
Hi, have you figured this out yet and if so, what is the answer?
There are not just several steps that are required but also you need a very fast CPU (or you have to work with very very small images),
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PLEASE HELP ME to put an image over a background image !!
Hello,
I need help on my AWT program. I have a map being displayed, and would like an image of a car (car.gif) to be displayed over the image of the map.
So my question is: How do I make this map a background image, and put the picture of the car right over it. I need my map loaded all the time, and the picture of the car will be reloaded many times over the same map, so a class method to load this map would be perfect. Any help, code, or suggestions would be great. Thanks so much!
Here is what I currently have for my map.
import java.awt.*;
import java.awt.event.*;
public class MyImage extends Panel {
private Image im = null;
Graphics g;
public void getMap(){
im = Toolkit.getDefaultToolkit().getImage("C:\\test_map.gif");
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(im,0);
try {
tracker.waitForID(0);
}catch (InterruptedException e){}
repaint();
public void paint(Graphics g){
this.g = g;
if (im != null) {
g.drawImage(im,0,0,this.getWidth(),this.getHeight(),this); //706,397
}Look at this sample, the car will start when the button will be pressed, and stop on the next press.
import java.awt.event.*;
import java.awt.*;
public class UsaTrip extends Frame
mapPanel map = new mapPanel();
Button move = new Button("Move");
TheMover mover = null;
public UsaTrip()
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent ev)
{ dispose();
System.exit(0);}});
setBounds(10,10,500,400);
setLayout(new BorderLayout());
add(map,BorderLayout.CENTER);
add(move,BorderLayout.SOUTH);
move.addActionListener(new ActionListener()
{ public void actionPerformed( ActionEvent e )
if (mover == null)
mover = new TheMover(map);
move.setLabel("Stop");
else
mover.end();
mover = null;
move.setLabel("Move");
setVisible(true);
public class TheMover extends Thread
mapPanel map;
boolean go = true;
int spin = 0;
public TheMover(mapPanel m)
map = m;
start();
public void end()
go = false;
public synchronized void run()
while (go)
map.moveCar();
try {sleep(100);}
catch(InterruptedException i){}
public class mapPanel extends Panel
Image map;
Image car;
int x=10,y=30;
public mapPanel()
map = getToolkit().getImage("usa.gif");
car = getToolkit().getImage("home24.gif");
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(map,0);
tracker.addImage(car,0);
try {tracker.waitForID(0);}
catch (InterruptedException e){}
public void moveCar()
repaint(x,y,25,25);
x++;
repaint(x,y,25,25);
public void update(Graphics g)
paint(g);
public void paint(Graphics g)
Rectangle r = g.getClipBounds();
g.drawImage(map,r.x,r.y,r.x+r.width,r.y+r.height,
r.x,r.y,r.x+r.width,r.y+r.height,this);
g.drawImage(car,x,y,this);
public static void main(String[] args )
new UsaTrip();
Noah
import java.awt.event.*;
import java.awt.*;
public class UsaTrip extends Frame
mapPanel map = new mapPanel();
Button move = new Button("Move");
TheMover mover = null;
public UsaTrip()
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent ev)
{ dispose();
System.exit(0);}});
setBounds(10,10,500,400);
setLayout(new BorderLayout());
add(map,BorderLayout.CENTER);
add(move,BorderLayout.SOUTH);
move.addActionListener(new ActionListener()
{ public void actionPerformed( ActionEvent e )
if (mover == null)
mover = new TheMover(map);
move.setLabel("Stop");
else
mover.end();
mover = null;
move.setLabel("Move");
setVisible(true);
public class TheMover extends Thread
mapPanel map;
boolean go = true;
int spin = 0;
public TheMover(mapPanel m)
map = m;
start();
public void end()
go = false;
public synchronized void run()
while (go)
map.moveCar();
try {sleep(100);}
catch(InterruptedException i){}
public class mapPanel extends Panel
Image map;
Image car;
int x=10,y=30;
public mapPanel()
map = getToolkit().getImage("usa.gif");
car = getToolkit().getImage("home24.gif");
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(map,0);
tracker.addImage(car,0);
try {tracker.waitForID(0);}
catch (InterruptedException e){}
public void moveCar()
repaint(x,y,25,25);
x++;
repaint(x,y,25,25);
public void update(Graphics g)
paint(g);
public void paint(Graphics g)
Rectangle r = g.getClipBounds();
g.drawImage(map,r.x,r.y,r.x+r.width,r.y+r.height,
r.x,r.y,r.x+r.width,r.y+r.height,this);
g.drawImage(car,x,y,this);
public static void main(String[] args )
new UsaTrip(); -
How to overlay a gif onto a still image
Hello, I am new to photoshop and I was wondering if it is possible to place a gif on top of an image? I saw a tutorial on YouTube explaining how to do it on cs5 but I can't find any tutorials for element. Thanks in advance to anyone that answers.
Try this:
Open picture B, the one you wish to select something from to add to another picture.
Use one of the selection tools, e.g. selection brush, lasso tool, to select the object. You will see an outline ("marching ants") once the selection is complete
Go to Edit menu>copy to copy the selection to the clipboard
Open picture A, then go to Edit>paste
Use the move tool to position object from picture B.
In the layers palette you should see picture A as the background layer, and object B on a separate layer. -
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Is it possible on illustrator or any other programs you know of?
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It is a very complex sketch and it's going to take forever if I try to trace it all with vectors.This sounds like a job for Photoshop. It's a scan, and you don't want to turn it to vectors, so a vector program like Illustrator is not the best choice in this case.
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DoEs AnYoNe KnOw HoW tO cOnVeRt GrAyScAlE ImAgEs To CoLoUr????
Hi all,
I 've got a simple image which has buildings,roads and grass areas. The image is currently in greyscale, and is basically a 400 by 700 text file full of interger values each representing a different land class - i.e. buildings have a value of 200, roads = 100 and grass areas = 60.
does anyone know how to get the image from a grayscale image to a colour image?
rob
xargh... got confuse cos your subject.
I 've got a simple image which has buildings,roads and grass areas. The image is currently in greyscale, and is basically a 400 by 700 text file full of interger values each representing a different land class - i.e. buildings have a value of 200, roads = 100 and grass areas = 60.this is not grayscale image rob. that file is data representation for your map, not color.
sure you can convert it to color image, but you must define what color convertion do you like.
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Randall Pursley
Attachments:
Compare Image to Intensity Graph.vi 77 KB -
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Hi, all:
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Do you mean like this?
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g.fillOval(0,0,(int) bounds.getWidth(), (int) bounds.getHeight());
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