picture format comparison

picture format comparison (180 * 1024x1024 pictures)
----------------------------------------------------

541M  osirion_tga                (lossless)
109M  osirion_png                (lossless, original)
99M   osirion_optipng            (lossless)
91M   osirion_lossless_webp      (lossless)
13M   osirion_lossy_webp         (-q=92 -pass=10, acceptable)
28M   osirion_jpg                (-q=92, ugly)

117M  osirion_tga.zip            (-mx=9)
109M  osirion_png.zip            (-mx=9)
97M   osirion_optipng.zip        (-mx=9)
88M   osirion_lossless_webp.zip  (-mx=9)
12M   osirion_lossy_webp.zip     (-mx=9)
28M   osirion_jpg.zip            (-mx=9)

90M   osirion_tga.7z             (-m0=lzma -mx=9 -mfb=64 -md=32m)
110M  osirion_png.7z             (-m0=lzma -mx=9 -mfb=64 -md=32m)
97M   osirion_optipng.7z         (-m0=lzma -mx=9 -mfb=64 -md=32m)
87M   osirion_lossless_webp.7z   (-m0=lzma -mx=9 -mfb=64 -md=32m)
13M   osirion_lossy_webp.7z      (-m0=lzma -mx=9 -mfb=64 -md=32m)
26M   osirion_jpg.7z             (-m0=lzma -mx=9 -mfb=64 -md=32m)

12M   osirion_lossy_webp.zip
13M   osirion_lossy_webp.7z
26M   osirion_jpg.7z
28M   osirion_jpg.zip
87M   osirion_lossless_webp.7z
88M   osirion_lossless_webp.zip
90M   osirion_tga.7z
97M   osirion_optipng.7z
97M   osirion_optipng.zip
109M  osirion_png.zip
110M  osirion_png.7z
117M  osirion_tga.zip