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Topic: Digital photo convertor (Read 560 times) previous topic - next topic

nitinsane

Recently I purchased a digital photo convertor that I can feed my photos and negatives to and it digitizes them and stores them on the SD card.

I was not happy with the quality and compression of the resultant images though.

I think I have necessary expertise to build something like this on my own using a stepper motors and line scanners (both of which I plan to salvage from an old scanner) with my trusty Arduino Uno.

Before starting on this though, I want to check if anyone else has attempted something like this and maybe can share the details and pitfalls faced.

Thanks.

AWOL

What do you plan on using for the image processing?
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nitinsane

bitmap for now. The main components in this is to use stepper motor to advance photo/negative at constant rate and use line scanner to scan each line.

James C4S

The Arduino can move steppers just fine. I think AWOL was getting at, what will you do with the image data itself. There Arduino can't do much with that.
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

holmes4

Which "photo converter" do you have. I don't think you will beat it with bits from an old scanner.

Mark

nitinsane

James C4S,

I'd leave image processing to higher powers (in 32-bit land). Arduino based board will be to capture and save/send.

holmes4,

scavenged parts are just for proof-of-concept. Once successful, I'd go with a CCD or CMOS. I'll need to do more research on this though.

James C4S


Arduino based board will be to capture and save/send.

With 2K of SRAM, this contraption won't be setting any speed records.
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

PeterH


Recently I purchased a digital photo convertor that I can feed my photos and negatives to and it digitizes them and stores them on the SD card.

I was not happy with the quality and compression of the resultant images though.

I think I have necessary expertise to build something like this on my own using a stepper motors and line scanners (both of which I plan to salvage from an old scanner) with my trusty Arduino Uno.


It would be a fun project, but matching let alone beating the scanning quality of a modern scanner with a DIY solution seems very optimistic to me.

What sort of resolution and quality are you aiming to achieve, and for what sort of scan size?
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AWOL

Quote
With 2K of SRAM, this contraption won't be setting any speed records.
..and a slow, low resolution ADC isn't going to help.
Imagine a fairly low resolution scan of 1024 x 1024 pixels.
So, 1024 x 1024 x 3 (RGB) pixels at around 9500 samples per second is around five and a half minutes.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

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