public void stretchBilinear(ScalarImage image)
/* Rescales the scalar data in 'image' to 'this' using bilinear interpolation. */
{
double xscale = (image.width - 1.0) / (width - 1.0);
double yscale = (image.height - 1.0) / (height - 1.0);
for (int j = height - 1, k = size - 1; j >= 0; --j)
for (int i = width - 1; i >= 0; --i, --k)
f[k] = (float) image.getBilinear(i * xscale, j * yscale);
}
/**
* Copy constructor, may be used to convert AccumImage.
*
* @param image
*/
public ScalarImage(ScalarImage image) {
this.width = image.width;
this.height = image.height;
this.size = this.width * this.height;
f = new float[size];
offset = new int[height];
for (int j = 0; j < height; ++j) offset[j] = width * j;
for (int k = 0; k < size; ++k) f[k] = image.getF(k);
;
}
public void copy(ScalarImage image, int xorigin, int yorigin)
/* Copies the scalar values from the sub-window of 'image' starting at
* (xorigin, yorigin) to 'this'.
* Requires: the sub-window fits inside 'image' */
{
if (((xorigin + width) > image.width) || ((yorigin + height) > image.height))
throw new RuntimeException("ScalarImage.Copy: Window too large");
for (int j = 0, k = 0; j < height; ++j)
for (int i = 0, l = image.offset[j + yorigin] + xorigin; i < width; ++i, ++k, ++l)
f[k] = image.getF(l);
}