Camera Hacker

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Kodak V550 reset

Hi!

I just tried to upload a manipulated firmware to my Kodak V550, however, it turned out to have been a major mistake: The camera doesnīt work any more! What happened was the following:

The Kodak V550 has got a way too high image compression. So I downloaded the firmware and changed the jpeg-quantization-table. First I replaced some values with similar ones (replaced all 63-numbers in the table with 61s) and it worked fine: the image quality had improved, the compression was less aggressive, but still too aggressive for me. So I tried it again, changed the values to less than 12, which means that I copied a Fuji FinePix F10-quantization-table into the firmware. The upload went fine, but when I turned on my camera again to activate the firmware, the lights were flashing for a few seconds and the camera turned itself off again. Nothing works, I canīt connect the camera to my computer, I canīt access any menu, the screen remains black, so thereīs nothing I can think of to do any more... but I think that there must be some way to reset the cameras "BIOS", no? I just don't have no idea how to do it. the camera doesn't have a reset-button, so can anyone help me?

thanx alot!

iosef
Wed, 26 Oct 2005 06:29:28 -0700

hmmm . . . never heard of a hacked firmware for the v550 before . . . Where can I find some information about this firmware?

Chieh Cheng
Wed, 26 Oct 2005 11:31:22 -0700

I made the hack myself

hacking the firmware is quite easy. However, I was told by Kodak that I had to go to a Kodak store and have it repaired, so you just donīt have got enough tries to try it out. This means, you only have one try to make it right, so itīs unlikely that you will.

I was looking in the firmware for the jpeg-quantization-table and changed it. you can see more about this on
Hacking firmware to improve image quality

I located it in my firmware by looking for a series of c-letters.
In the Hex-editor, itīs the value "63".
First, I changed all (at least I think all) Cs into As, which means into the value 61, and this worked, however, the jpeg-file was just a little bigger.
Then I entered much lower values, and this destroyed it.

The only thing you have to do in order to make the camera accept the modified firmware, is to change the file attributes. Download a file attributes changer, and then enter the values (creation date etc.) of the original firmware file.

iosef
Thu, 27 Oct 2005 09:23:30 -0700

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