JPG to TIFF?

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sherbs

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Edit My Images
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Before you all start telling me to shoot RAW and save in TIFF in the first place, this is not about that.

Situation is, I've got a whole bunch of JPGs that were scanned from slides, originally shot in the '60s. They are in bad shape - colour casts, scratches, damage, the lot and I want to clean them up. The original slides no longer exist, all I've got is the JPGs.

I'm thinking that before working on them I should convert to TIFF so they don't deteriorate further. Is this the right way to go or is there a better way?

Thanks for any advice.
 
That would be my plan, yes. 16 bit TIFFs to reduce the risk of artefacts due to the processing you'll need to do in order to clean them up, and by re-compressing each time you save as a JPEG. Keep them as TIFFs throughout the work flow too.
 
Pookeyhead said:
That would be my plan, yes. 16 bit TIFFs to reduce the risk of artefacts due to the processing you'll need to do in order to clean them up. Keep them as TIFFs throughout the work flow.
Click to expand...

Agreed. Or 8-bit TIFFs if you can't do 16 bit. Certain forms of image degradation may be unavoidable during your overall improvement processes, the ambition is to minimise them. What's your software?
 
Thanks for the advice so far.

I use Photoshop CS6 so should be OK as far as possible options go.

I notice Topaz do a DeJpeg plugin that's supposed to improve jpegs but mainly artifacts, I think. Anyone used it? Just wondering if there is any way to improve the jpegs before converting them?

Cheers.
 
I have photoshop set up so that Jpegs open in raw converter.
I make any prime adjustments there before saving out as a tif.

In preferences make sure that there is a tick in " prefer camera raw for Jpeg files"
Then they will open first in the raw converter.
 
Now I've got two opinions. I'm still thinking it's best to convert to tiff before any adjusting rather than adjust, then save to tiff. Especially if there is a lot of adjusting to be done. Don't forget, these are not jpegs from a digital camera, they are poorly scanned from slides and are only big enough to give a 5x3" print at 300dpi.



Cheers.
 
Keep your originals intact - as jpgs or converted to tiffs, hardly matters. Save any modded versions with a new file name.

Pixel size challenging given what you've said about condition. Maybe upsize first? One way of doing this is to blur each image slightly (gaussian, fractions of a pixel) before resizing up ('image size'). At this stage only the actual pixel count matters, not the resolution per inch. Experiment - but see sentence 1 - and now definitely re-save as a tiff.

Subsequent attack - taking result of the above, add adjustment layers eg for levels / curves (you can adjust colour balance in curves). Whatever. Save as you go as a layered tiff or psd - that's something you can go back to & alter over a number of work sessions. The layers are non-destructive till you finally flatten them before printing.

Enough?
 
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