Processing method for a two-dimensional initial image and objects corresponding thereto

A computer program stored on a computer readable medium for processing a two-dimensional initial image used in a medical procedure, comprising:

• a computer subroutine for disassembling the two-dimensional initial image into a plurality of partial images and a residual image by a computer,
• wherein each of the partial images contains a component of the two-dimensional initial image that varies locally with a predetermined partial image frequency departing from zero,
• wherein the residual image contains a direct component of the two-dimensional initial image that is locally invariable;
• a computer subroutine for assigning one of the partial images as a pilot image and assigning a frequency of the pilot image as a pilot frequency based on a comparison of frequencies of the partial images with a target frequency;
• a computer subroutine for determining a plurality of weighting factors for the partial images and the residual image;
• and
• a computer subroutine for summing the weighted partial images and the weighted residual image into a final image,
• wherein the computer determines the weighting factors of the partial images so that:
• the partial images with lower frequencies than the pilot frequency are weighted less than the pilot image but still contribute to the final image,
• the partial images with higher frequencies above the pilot frequency make:
• a large contribution to the final image when a noise component in the initial image is small, or
• a small contribution to the final image when the noise component in the initial image is large.

A computer for processing a two-dimensional initial image used in a medical procedure, comprising:

• a hard drive storing a computer program, the computer program comprises:
• a computer subroutine for breaking down the two-dimensional initial image into a plurality of partial images and a residual image by the computer,
• wherein each of the partial images contains a component of the two-dimensional initial image that vary locally with a predetermined partial image frequency departing from zero,
• wherein the residual image contains a direct component of the two-dimensional initial image that is locally invariable;
• a computer subroutine for assigning one of the partial images as a pilot image and assigning a frequency of the pilot image as a pilot frequency based on a comparison of frequencies of the partial images with a target frequency;
• a computer subroutine for determining a plurality of weighting factors for the partial images and the residual image;
• and
• a computer subroutine for summing the weighted partial images and the weighted residual image into a final image,
• wherein the computer determines the weighting factors of the partial images so that:
• the partial images with lower frequencies than the pilot frequency are weighted less than the pilot image but still contribute to the final image,
• the partial images with higher frequencies above the pilot frequency make:
• a large contribution to the final image when a noise component in the initial image is small, or
• a small contribution to the final image when the noise component in the initial image is large.