Summation of width and height to be displayed as prefix to photo name

[aniecki]

Is there an easy way to do this - by renaming a set of photos to contain a sum of the two?
I know that width and height can be rather easily displayed in a renamed photo, but a  summation (say 5 digit format) of these two values?  Thanks.

[StarGeek]

Try
exiftool "-Filename<${Megapixels#;$_*=1000000}%f.%e" /path/to/files/

More details would be needed to limit it to five digits, as any image over 316x316 would exceed five digits.

[Phil Harvey]

If you really want the sum and not the product, you could do this:

exiftool "-testname<%f-${imagesize;tr/x/+/;$_=sprintf '%.5d',eval}.%e" DIR

If this gives you the names that you want, then replace "testname" with "filename" to do the actual renaming. With this, a 2688x2016 image named "phil.jpg" would be renamed to "phil-04704.jpg".

- Phil

[aniecki]

Thanks Gents.
I have modified to fit Linux
exiftool '-testname<%f-${imagesize;tr/x/+/;$_=sprintf "%.5d",eval}.%e' .

Ok, now when I am done.
How to come to this result, where to study to understand it? Do I have to study Perl?

Cheers!

[StarGeek]

If you really want the sum and not the product,

Ooops, I should read more closely.

[Phil Harvey]

How to come to this result, where to study to understand it? Do I have to study Perl?

The basics of file renaming are explained here.  The advanced formatting feature is explained in the -tagsfromfile section of the documentation, but the expressions (ie. tr/x/+/;$_=sprintf "%.5d",eval) are pure Perl and require a knowledge of the language.

- Phil

[Phil Harvey]

Ooops, I should read more closely.

...for once I'm the one that read things correctly.

- Phil

[aniecki]

The product is also an interesting example here. Perhaps there is way to correct it slightly to change the format,
as given
'./CO-0282x0225-0005.jpg --> './63450CO-0282x0225-0005.jpg'

to (with leading zero)
'./CO-0282x0225-0005.jpg --> './063450CO-0282x0225-0005.jpg'

So even the low pixel photos will be prefixed with the same length string?

Thanks!

[Phil Harvey]

Just change %.5d to %.6d in the sprintf format string.

- Phil

[aniecki]

For the sum, yes, yet the first example given was for product, so the problem with this command:

exiftool "-Filename<${Megapixels#;$_*=1000000}%f.%e" /path/to/files/

is that that here is not a format for the string.

282x225 eq 63450 is a 5 digit number, and we want it to be 6 digit (with leading zero).

Thanks.

[Phil Harvey]

exiftool "-Filename<${Megapixels#;$_=sprintf '%.6d', $_*1000000}%f.%e" /path/to/files/

- Phil

[aniecki]

Thanks Phil, yes after giving me lead I even figured it out.