how to apply a color mask a QImage?

[jackajack01]

hello

I have a gray image in Qimage like this:

imgGray.jpg


and I need to apply a mask to change the color but without changing the image. For example...


imgColor.jpg


Any idea how I can do this????


thanks

[wysota]

How is the "mask" defined? Is it an image? How exactly do you want to "mask" the image?

[jackajack01]

I have an image in gray and I want you to see color.

How I can do that????

that is, change the pixels of the image grayscale to RGB

[wysota]

There is a number of algorithms you can use and depending which one you choose, you'll get a different result.

[jackajack01]

can you give me an example of one of these algorithms?

[wysota]

Launch Gimp or Photoshop and take a look at the different layer compositing modes.

[jackajack01]

I may not explain well, my English is terrible.

anyway I solved the problem by doing this:

QVector<QRgb>color; //vector must be completed

QImage img1("image.jpg");
QImage img2(img.width(), img.height(), QImage::Format_RGB32);
int n;


for(int x=0; x<img.width();x++)
{

for(int y=0; y<img.height();y++)
{

n=img1.pixel(x,y);
img2.setPixel( x, y, color[n] );

}

}

thanks

[wysota]

Doesn't it simply copy one image into the other?