Hi All,

I have one image in which I have simply modified a pixel value to yellow. I save that image onto the hard disk and load the modified (new image with the yellow pixel) again to see that the pixel location is different that was expected or saved (the pixel location is determined by the mouse click). Following is the code excerpt

Code:

if (mousePressed) 
{
			ellipse(mouseX,mouseY,2,2);
			
			/* 
			 * This part is if you want to change the color of the                 pixel under the mouse click
			 */
			
			
			int pixelColorYellow = color(254, 255, 0);
			
			img.set(mouseX,mouseY, pixelColorYellow);
			img.updatePixels();

			img.get().save(fileName.substring(0, fileName.length()-4).concat("_Modified.jpg")); // This does save the file on the disk
			
}

if (key =='L')
{

	imgModified = loadImage(fileName.substring(0, fileName.length()-4).concat("_Modified.jpg"));
	image(imgModified,screenWidth-472,100,412,412);
}
 

Any help or insight would be great!

Thanks!

Thanks PhiLho. I didn't mention the other part of the code where after changing the pixel he has to PImage.save the imageg by hitting the key "S".

The Image is being saved onto the filesystem after being modified by the img.set() and then img.save() but when a loadImage is performed to load the same saved image, it shows the pixel but on a different location.

Am attaching the code with the missing part.

Thanks again, appreciate your input
Code:

void draw()
{
	if (mousePressed) 
	{
			ellipse(mouseX,mouseY,2,2);
			
			/* 
			 * This part is if you want to change the color of the		     pixel under the mouse click
			 */
			
			
			int pixelColorYellow = color(254, 255, 0);
			
			img.set(mouseX,mouseY, pixelColorYellow);
			img.updatePixels();

			img.get().save(fileName.substring(0, fileName.length()-4).concat("_Modified.jpg")); // This does save the file on the disk
			
	}



	if (key =='L')
	{

		imgModified = loadImage(fileName.substring(0, fileName.length()-4).concat("_Modified.jpg"));
		image(imgModified,screenWidth-472,100,412,412);
	}

	if (key=='S' || key=='s')
	{
		if (fileName != "")
		{
	
			// Saving the modified image to be loaded for Simulation
			// If the original Medical Image has been modified then save it with a new name for Simulation
			if (img.isModified()) 
			{
				img.get().save(fileName.substring(0, fileName.length()-4).concat("_Modified.jpg"));
			}
		}
		else 
		{
			System.out.println("Cannot save without an image being loaded first!");
		}
	}
}
 

Kindly pardon my ignorance, can you guide me through in determining the ImageOffset in my case?

What I understand from your post is that when a users mouse clicks the actual pixel (or mouse click) is not on the image itself rather at some offset. Right?

Thanks

Hi PhiLho,

Thanks a bunch, appreciate your help.

I got it right, I guess I was considering the whole screen resolution. Adjusted the imageoffset and voila!

Thanks again