Image Sharpening Method Suitable for Himawari-8 Images

Abstract

A novel lightweight and high-accuracy variant of the image pan-sharpening tech-2 nique is designed for Himawari-8 multispectral images. This method, named 3 Additive Template Sharpening, injects higher-wavenumber components of the 4 highest-resolution Band 3 images into lower-resolution visible or shortwave in-5 frared images, thereby providing multispectral high-resolution images. This in-6 jection is realized by adding inter-band differential field to the high-resolution 7 band, making use of the specific pixel arrangement of the Himawari-8 imager for 8 2 K. Yamazaki, Image sharpening method suitable for Himawari-8 images simple and accurate coordinate transformations. Both subjective inspection of RGB composite images and objective evaluation of the upsampling indicate thatAdditive Template Sharpening exhibits higher accuracy than existing methods for Bands 1-6 of Himawari-8. This technique not only enables operational forecasters to diagnose atmospheric conditions in more details using higher-resolution RGB composites, but also provides higher-quality true-color imagery for the public.