$ ~/bin/convert-jpeg-to-pdf-testing.sh ~/desktop/t/t2/*jpg
Command line
convert-jpeg-to-pdf-testing.sh /home/dtr/desktop/t/t2/00000001.jpg /home/dtr/desktop/t/t2/00000005.jpg /home/dtr/desktop/t/t2/00000010.jpg /home/dtr/desktop/t/t2/00000026.jpg /home/dtr/desktop/t/t2/00000027.jpg
Version: ImageMagick 7.0.7-35 Q16 x86_64 2018-06-04 https://www.imagemagick.org

ALGO                P.1 SSIM        P.2 SSIM    P.3 SSIM    P.4 SSIM    P.5 SSIM    % OF ⅀ ORIG SIZE    SIZE in KiB    SIZE in Bytes
<SOURCE>            –               –           –           –           –                        100            556           560420
B44                 OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
B44A                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
BZip                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
DXT1                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
DXT3                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
DXT5                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
Fax                 OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
Group4              OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11400         11670556
JBIG1               OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
JBIG2               OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11400         11670556
JPEG                FAIL (0.998)    OK (1)      OK (1)      OK (1)      OK (1)                   102            564           576359
JPEG2000            OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                   481           2640          2697323
Lossless            OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11400         11670556
LosslessJPEG        OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
LZMA                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
LZW                 OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  1077           5904          6040425
None                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2651          14516         14859191
Piz                 OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
Pxr24               OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
RLE                 OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
Zip                 OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                   784           4296          4395627
RunlengthEncoded    OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556
ZipS                OK (1)          OK (1)      OK (1)      OK (1)      OK (1)                  2082          11404         11670556