topic Re: Reducing size of RAW and JPEG images in EOS DSLR & Mirrorless Cameras

EOS 5DS R Reducing size of RAW and JPEG images

hvulpus — Tue, 12 Nov 2024 13:53:14 GMT

Hi,

I'm off in France photographing Romanesque churches with a 5DSR which renders wonderful detail.

I find that reworked RAW images, which seem to save as PSDs, can be huge, up to 130MB. The RAWS are all in the 60MB range to start and the JPEGs in the 20MB range.

How does one reduce such large images to a manageable size, say, to send via email or use in Powerpoint?

Howard

Re: Reducing size of RAW and JPEG images

Tronhard — Sun, 10 Nov 2024 20:59:38 GMT

Hi again:
I see a series of posts in this vein and your project sounds very interesting.

The question I would have is what post-production software are you using? I use PS and have no issue in saving the final images as JPG files in a vastly file reduced size. For example, I reduced an image of over 80GB to about 6GB - of course there is a reduction in resolution, but that is inevitable if that is the requirement. The alternative is to link to a large file.

If you want to send images of large size, the best thing is to use a file-sharing program such as Google Drive, MS OneDrive, Box, Dropbox, or iCloud Drive.

Re: Reducing size of RAW and JPEG images

March411 — Sun, 10 Nov 2024 23:11:00 GMT

Good day hvulpus.

What image editing software are you using. I'm going to assume Photoshop since you said the images are saving as a PSD.

When saving an image in PS using the "Save As" command the default is PSD and jpeg is not in the selection drop down pane. You can easily fix this by going into preferences, once open go to file handling (red arrow). look in the main pane on the right and you will see "Enable Legacy Save As", check that box. Now when you use the "Save As" command the drop down will display several options for jpeg, the top jpeg selection is the standard.

Choose your directory, name the file and save. This dialogue box below will appear giving you have the ability to save it as a large or small file. Use the slider or enter a number 1-12 and select OK. File is saved and the size you desire. If you don't want to change your preferences the to save as a jpeg just use the file "Save As Copy" prompt and follow the same process. For me old habit's die hard so I changed my preferences. I'm just used to going to "Save As" when working with files of any type.

Hope this helps.

Re: Reducing size of RAW and JPEG images

wq9nsc — Sun, 10 Nov 2024 23:46:47 GMT

For many years, my fast approach to reducing a file to smaller size for email etc. is to use the program IrfanView which is a very versatile program. It can handle display of pretty much any format of image file and one of its features is you can specify a desired file size when saving a jpg file to make it any reduced size you want.

It is a free program but I make annual contributions to the author because I use it so much. It has been my default jpg viewer on my PCs for well over a decade. Just make sure that if you decide to download it, go to the official homepage and not some place that tries to bundle other stuff with the download.

IrfanView is what I use here when decreasing image files to stay within the posting size limit for this site.

Rodger

Re: Reducing size of RAW and JPEG images

Waddizzle — Mon, 11 Nov 2024 00:01:22 GMT

I don’t think you can reduce the size of your RAW files without compressing them and potentially losing data. But you can significantly reduce the size of JPG files by simply reducing the bit depth.

I don’t know how you plan to use the files. Images displayed online typically have only 8 bits of color resolution.

Re: Reducing size of RAW and JPEG images

March411 — Mon, 11 Nov 2024 00:58:44 GMT

I just download the application, I'm going to have to give this one a spin around the block.

Thanks!

Re: Reducing size of RAW and JPEG images

stevet1 — Mon, 11 Nov 2024 01:17:42 GMT

Roger,

Irfanview is my program of choice too.

Steve Thomas

Re: Reducing size of RAW and JPEG images

wq9nsc — Mon, 11 Nov 2024 13:30:53 GMT

Marc,

Be sure and take a look at the plug-ins which add a lot of versatility to the program.

Rodger

Re: Reducing size of RAW and JPEG images

ctitanic — Mon, 11 Nov 2024 14:50:22 GMT

I have been using irfantview as a viewer for more than 20 years probably. It's one of the best freeware I have ever used.

Re: Reducing size of RAW and JPEG images

Ron888 — Tue, 12 Nov 2024 01:53:46 GMT

Another vote for Irfanview. It's my go-to resizer for basic needs. Hit ctrl/r, select pixel dimensions or percentage resize.Easy as
If i want to fussy about image quality i'll use photoshop.First i'll resize the picture,then use the save for web function.(ctrl/shift/alt/s).A 'before and after' window will pop up.Play with the JPG quality slider on the right to get the result you want.It will show how many Mb the picture will be as you're doing this.
Hint: the highest setting doesnt always give the sharpest picture! I think it's due to different jpg compression settings working best with certain types of detail in pictures.

Re: Reducing size of RAW and JPEG images

hvulpus — Tue, 19 Nov 2024 17:47:15 GMT

Dear Trevor, I just saw your response, for which many thanks. I, too, use Photoshop. But what do you do in PS to make such a reduction?

P.S., Do you mean MB and not GB in the above?

Thanks again,

Howard

Re: Reducing size of RAW and JPEG images

hvulpus — Tue, 19 Nov 2024 17:52:21 GMT

Dear Marc,

This is incredibly helpful. I used to have saved procedures in PS for reducing batches of large JPEGS. It was incredibly complicated setting of the batch conversions, and every time I changed computers, which is pretty often and I have a bunch of the, I'd have to get help from work IT. This is the first time, however, I've worked with RAW and love what I am able to do with it. Just couldn't figure out the size reduction issue, and thank you much.

Howard

Re: Reducing size of RAW and JPEG images

hvulpus — Tue, 19 Nov 2024 17:59:55 GMT

Thanks so much. I think I will not go to another program unless I cannot get the PS to work satisfactorily. Will IrfanView handle RAW files?

Howard

Re: Reducing size of RAW and JPEG images

hvulpus — Tue, 19 Nov 2024 18:03:11 GMT

Dear Ron, Thanks so much. You are right about the sometimes lack of correlation between JPEG settings and actual appearance. I had always thought this could be a function of computer screen resolution.

Howard

Re: Reducing size of RAW and JPEG images

stevet1 — Tue, 19 Nov 2024 22:01:23 GMT

Howard,

Yes. Irfanview will handle RAW files. Just go to its download page and download the Plugins.

I haven't used it to edit RAW files yet. I use DPP4 for that.

Steve Thomas