画像のDPIをImageMagicのコマンドで変更してみた

---

~/Documents/kk2023part3/kk2023_07/images main*
❯ identify -format '%x,%y\n' 2023-07-07_231749＿.jpeg 
72,72

~/Documents/kk2023part3/kk2023_07/images main*
❯ convert -density 320 -units PixelsPerInch 2023-07-07_231749＿.jpeg x.jpg

~/Documents/kk2023part3/kk2023_07/images main*
❯ ls -alh      
total 4.5M
drwxr-xr-x 4 a66 staff  128  7 21 15:51 .
drwxr-xr-x 8 a66 staff  256  7 21 15:47 ..
-rw-r--r-- 1 a66 staff 2.2M  7 21 15:48 2023-07-07_231749＿.jpeg
-rw-r--r-- 1 a66 staff 2.4M  7 21 15:51 x.jpg

~/Documents/kk2023part3/kk2023_07/images main*
❯ identify -format '%x,%y\n' x.jpg                                        
320,320

~/Documents/kk2023part3/kk2023_07/images main*
❯ open .

~/Documents/kk2023part3/kk2023_07/images main*
❯ convert -density 320 -units PixelsPerInch 2023-07-07_231749＿.jpeg x.jpg

~/Documents/kk2023part3/kk2023_07/images main*
❯ identify -format '%x,%y\n' x.jpg                                        
320,320

~/Documents/kk2023part3/kk2023_07/images main*