Filter to enhance the quality of image

[Stephen Liu]

(05-24-2022, 04:32 PM)Ofnuts Wrote:

(05-24-2022, 09:53 AM)Stephen Li Wrote: Tried again.  Re-scan the color film negative on Smartphone with Macro Mode

Quality and smartphone in the same sentence...

The sensor in smartphones is very small and noisy. The images look good because they are heavily post-processed and usually checked on the smartphone screen. But this sort of precludes any decent post-processing. In addition the processing is done using algorithms that try to identify the kind of scene and to select a specific process, but I doubt they have anything specific to scanning negatives...

Thanks for your advice.

You're correct.  Scanning on smartphone without scan software needs heavy post-editing but with scan software much better, less post-editing work.

I have tested "Filmbox" and "Photo Negative Scan".  The quality of the positive images is much better.  I'm now testing Google "Photoscan".  I'll pay for either of them after finishing tests.

My another headache is finding a correct annotation of ImageMigick running their commands.  I have read;

Annotated List of Command-line Options
https://imagemagick.org/script/command-line-options.php

But it is not easy.

Examples.
On GIMP
-> Colors - Auto -> Equalize

-> Colors -> Color Balance

What command of IM shall I use?  What are their annotation?  I spent sometime reading their Annotated List

Please shed me some light.  Thanks

Also I have spent sometime collecting information going DSLR route and making heavy postings on other forums.  I have no objection to buy a new DSLR camera but I expect the camera can be used for shooting daily life photos without purchasing additional LENS.  Unfortunately up to now I haven't received an advice catering my need.

Edit
===
Example :
Smartphone scanning running Filmbox scan software, without cropping nor other post-editing, only running IM mogrify command, converting negative image to positive. (pls refer to photo attached)


Regards

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(05-24-2022, 04:38 PM)Krikor Wrote: Perhaps using Sallyanne's idea with `G'MIC - Repair - Unpurple' might be another option.

Hi,

Thanks for your advice.

Whether you refer to;
GREYC's Magic for Image Computing
https://gmic.eu/gmic300/

What I expect to do is batch editing, running command lines.  I have about a thousand film negatives to process. 

I'm now investing which route shall I go ?

DSLR route
Smartphone route
Flatbed scanner route

I don't expect to go the last route.  The scanning speed is very slow on Flatbed scanner.  I have been scanning Photos/Doc/Negatives for >10 yrs on flatbed scanner.  But still post-editing can't be avoided

Regards