Image tool for game "Yuru Camp Have a nice day"&"Summertime Render Another Horizon" (Switch) Those pictures are DDS files without header, just add a header to it is okay. Script will identify dimensions of a texture from original file's footer.
For BG and EG use following command:
python headeradder.py "path/to/file1" "path/to/file2" ...
For SP, BU and MG (STRAH only) use following command:
python headeradder.py -alpha "path/to/file1" "path/to/file2" ...