Posted: Thu Sep 25, 2003 2:17 pm
I guess you mean the mosaic filter that covers the image with large uniform colored square blocks. It actually removes image information in a way that is very similar to sizing down photos. You can't add again the image information that was lost.
The only thing you can do is the following:
1. Zoom into the image and see of how many pixels wide or high each block is.
2. Size down the image by that value. E.g. if each block is 4 pixel wide and high, resize to 25%, if it is 8 pixels wide or high, resize to 12.5%. Use the Nearest Neighbor method for doing that.
3. Now you have the original resolution of the image, because each pixel has its unique color value. The size of the blocks has been reduced to one pixel.
4. What you could do now is to size up the image again with the Bicubic method. That won't add the original information again, but will try to estimate some of the original image information. I would only recommend to size it up by 400%, otherwise the image will get too blurry.
I hope this helps.
The only thing you can do is the following:
1. Zoom into the image and see of how many pixels wide or high each block is.
2. Size down the image by that value. E.g. if each block is 4 pixel wide and high, resize to 25%, if it is 8 pixels wide or high, resize to 12.5%. Use the Nearest Neighbor method for doing that.
3. Now you have the original resolution of the image, because each pixel has its unique color value. The size of the blocks has been reduced to one pixel.
4. What you could do now is to size up the image again with the Bicubic method. That won't add the original information again, but will try to estimate some of the original image information. I would only recommend to size it up by 400%, otherwise the image will get too blurry.
I hope this helps.