High-resolution image generation method

摘要

The present invention provides a high-resolution image generation method which is capable of generating a high-resolution image from multiple low-resolution images having displacements without using an iterative computation.;A high-resolution image generation method for generating a high-resolution image from multiple low-resolution images having displacements, comprises a first step of performing a registration processing of multiple low-resolution images; a second step of generating an average image having the undefined pixels and a weighted image based on the displacement information obtained by the registration processing and multiple low-resolution images; and a third step of generating the high-resolution image by estimating pixel values of the undefined pixels included in the average image.

主权项

1. A high-resolution image generation method for generating a high-resolution image from multiple low-resolution images having displacements, said method comprising:
a first step of performing a registration processing of said multiple low-resolution images; a second step of generating an average registration image in a high-resolution image space having undefined pixels based on the displacement information obtained by said registration processing and said multiple low-resolution images; and a third step of generating said high-resolution image by estimating pixel values of said undefined pixels included in said average image, wherein in said first step, corresponding high-resolution pixel position of each pixel of said multiple low-resolution images is calculated by said registration processing, wherein said second step comprises a step that generates said average registration image in a high-resolution image space by respectively computing an average pixel value of multiple low-resolution image pixels whose corresponding high-resolution pixel position is approximated by the same high-resolution pixel position, and when generating said average registration image, a pixel that exists in a high-resolution pixel position by which no low-resolution image pixel is approximated, is treated as said undefined pixel, wherein a method that estimates said pixel value of said undefined pixel by interpolating pixel values of defined pixels existing in the neighborhood of said undefined pixel, is referred to as a first undefined pixel estimation method, wherein a method that sets a predetermined image having the number of pixels same as said average image as a reference image and then sets a pixel value of a pixel of said reference image corresponding to said undefined pixel as said pixel value of said undefined pixel, is referred to as a second undefined pixel estimation method, wherein said third step estimates said pixel value of said undefined pixel by performing an alpha blend of a first undefined pixel value estimated by said first undefined pixel estimation method and a second undefined pixel value estimated by said second undefined pixel estimation method.