Post hoc analysis comparison results of HRI_EUV. Panel a: Selected demonstration image showing two representative features: a jet (area of 150 square pixels) and a prominence (area of 300 square pixels). Panel b: Comparison between the original image and images at four different compression ratios in the jet region, with annotations showing compression ratios and the sum of pixel intensities within the region. Panel c: Comparison between the original image and images at four different compression ratios in the prominence region, with annotations showing compression ratios and the sum of pixel intensities within the region.