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data-medics
 Post subject: JPEG Repair Service
PostPosted: March 28th, 2016, 17:20 
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I'm launching a new service to repair JPEG files that are damaged by bad sectors. You can read up on it here: https://www.data-medics.com/jpeg-jpg-re ... -recovery/

And no, it's not just using some crap software like Stellar or EaseUS which we all know doesn't work.

If anyone would like to see a sample of what I can do, please post a JPEG image below that has bad sectors and I'll repair/re-post it for you.

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fzabkar
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 2:30 
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Looks good, but why does a bad sector look like this instead of all zeros?

Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0000D800  D9 96 96 D5 38 51 B3 E6 69 AC 20 75 05 9A A5 A5  Ù––Õ8Q³æi¬ u.š¥¥
0000D810  A9 55 C6 4B 50 C7 3D 33 94 12 D4 8C 6B 3D 6A 48  ©UÆKPÇ=3”.ÔŒk=jH
0000D820  AA DF 5C EF 10 4A 63 48 1D 14 52 C9 AC 98 BA 2A  ªß\ï.JcH..Rɬ˜º*
0000D830  F5 9D 33 2B 2D 63 33 10 CE B5 CF 35 75 A4 BA 31  õ.3+-c3.εÏ5u¤º1
0000D840  E6 EC E4 DE B2 8B 7A A5 E1 12 F6 67 C9 75 D5 26  æìäÞ²‹z¥á.ögÉuÕ&
0000D850  B3 29 D9 98 E8 D2 58 9E 95 5C 7A 5D 6B 7D 95 5A  ³)Ù˜èÒXž•\z]k}•Z
0000D860  DC F2 2E AC A6 62 A2 F2 AE 7D B3 D3 7B CB 4B 63  Üò.¬¦b¢ò®}³Ó{ËKc
0000D870  1E 95 27 26 A4 65 D3 78 5E ED 42 CF 4A 95 6B 19  .•'&¤eÓx^íBÏJ•k.
0000D880  F4 E7 89 16 96 66 91 A6 7A CE 79 B9 87 55 53 49  ôç‰.–f‘¦zÎy¹‡USI
0000D890  D0 E9 9E 7B CA 72 D6 D8 95 78 D5 97 34 D9 96 2B  Ðéž{ÊrÖØ•xÕ—4Ù–+
0000D8A0  27 3B 8A CF 9F 7C 75 AE 68 DF 0D 76 D3 AF 93 7B  ';ŠÏŸ|u®hß.vÓ¯“{
0000D8B0  D7 4D 1F 4E 66 3A EE B2 CC D2 E4 E5 9E C9 98 E0  ×M.Nf:î²ÌÒäåžÉ˜à
0000D8C0  C7 D1 E4 D7 3E 64 B1 DD D7 3C D5 D6 9B F2 D4 76  ÇÑä×>d±Ý×<ÕÖ›òÔv
0000D8D0  4E 04 95 9E 82 E7 6D C6 AF 37 99 A4 C4 6A 19 C6  N.•ž‚çmƯ7™¤Äj.Æ
0000D8E0  67 F7 24 07 D0 F7 00 00 00 00 00 00 00 00 00 00  g÷$.Ð÷..........
0000D8F0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D900  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D910  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D920  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D930  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D940  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D950  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D960  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D970  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D980  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D990  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D9A0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D9B0  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
0000D9C0  00 00 00 00 00 00 00 00 00 00 00 00 00 1F FF C4  ..............ÿÄ
0000D9D0  00 32 10 00 02 02 02 02 01 05 00 01 03 04 03 01  .2..............
0000D9E0  00 02 03 00 01 02 11 03 21 10 12 31 04 13 20 22  ........!..1.. "
0000D9F0  41 32 05 14 30 23 40 42 80 50 60 70 33 15 24 34  A2..0#@B€P`p3.$4

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pcimage
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 2:58 
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Maybe because it has been read without ECC, such as the final pass on DDI for example?

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data-medics
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 8:31 
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For the examples I posted I just selected some random sections of 512 bytes in WinHex to delete. I didn't bother to check if I was aligning it to an actual sector boundry. I've done the process on several images that actually were affected by bad sectors, but I wasn't going to post any client data online, so I had to just simulate the damage on a few pictures I took myself.

Perhaps in that spot, I started to zero fill and didn't actually highlight a full 512.

In any event, if you'd like a real life test just post an image you have or that your damaged yourself.

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data-medics
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 8:49 
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Edit: Actually the reason it's like that is you're not looking at the code of the original image. My site has a Wordpress plugin that compresses images that are higher resolution than they need to be. You're looking at a reduced resolution copy of the original, thus the smaller than 512 block of zeros.

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Amarbir[CDR-Labs]
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 9:21 
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data-medics wrote:
I'm launching a new service to repair JPEG files that are damaged by bad sectors. You can read up on it here: https://www.data-medics.com/jpeg-jpg-re ... -recovery/

And no, it's not just using some crap software like Stellar or EaseUS which we all know doesn't work.

If anyone would like to see a sample of what I can do, please post a JPEG image below that has bad sectors and I'll repair/re-post it for you.


Jared ,
Best of Luck Brother With This .If i Ever Have a Case Will Let You Know ,Would Get In Touch With you In april To discuss Some Business Proposal If i Get Time From The Old HDD sorting i Am Doing These Days

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fzabkar
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 16:29 
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data-medics wrote:
Edit: Actually the reason it's like that is you're not looking at the code of the original image. My site has a Wordpress plugin that compresses images that are higher resolution than they need to be. You're looking at a reduced resolution copy of the original, thus the smaller than 512 block of zeros.

Spildit's resized JPEG doesn't have any blocks of zeros, nor do any of your JPEGs that I resize in my image editing software.

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fzabkar
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 16:32 
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Spildit wrote:
Here you have it :

6 simulated "bad sectors" :

Those aren't "sectors". To simulate bad sectors, you need to replace 512-byte or 4096-byte blocks of data with zeros on a sector boundary.

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data-medics
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 17:21 
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Yes, I will need the original damaged jpeg, not a converted one. Once it's converted I can't do anything to fix the stream.

Can you zip it and post again?

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fzabkar
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 17:26 
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data-medics wrote:
Yes, I will need the original damaged jpeg, not a converted one.

R-click the image and select "saved linked content as" or whatever your browser supports.

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data-medics
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 17:41 
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Thought I did that the first time. Anyway here's the repaired image:

Attachment:
Fixed1.jpg
Fixed1.jpg [ 1.76 MiB | Viewed 41075 times ]

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data-medics
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 17:54 
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The color is a little off, probably because the first bad sector was so near to the top of the picture there was very little to compare the color with. It's close enough that most people wouldn't notice the repaired spots at a glance.

That'll be $10 please. :lol: JK

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data-medics
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 17:59 
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Spildit wrote:
This might be a very bad idea in some ways ...

Let's say that you have a client with a bad drive. You recover the data by PC-3000 / DE / Head Swap, whatever. You charge the client for exampl $1000 USD.

Now the client checks the data and he figures out that he have 1000 images that are very important to him/her that are damaged. This might happen because media/platter damage that you didn't notice.

Now what will you do ? Recover/restore the 1000 images by hand because the client already paid ? Or you offer the image restoration service at $10 for each image ? Wouldn't the client fell that it's sort of a scam ? Like having an initial payment and then another payment to recover the lost images ?

Unless you clear state when doing "normal" data recovery cases that in case of damaged images the price have to be paid acording to the images the client wants to recover ?


On that thought, my paperwork that my customers sign explains about bad sectors and that the service doesn't include any file repair or restoration services. However if I plan on pushing such service onto customers, I'm sure I'll need to make it even more clear up front. Perhaps I'll even offer a few as part of the recovery cost, but if they want more it'll be extra. As it is now we'll do the occasional PST repair and whatnot, just to make the customer happy and avoid them returning asking for that help.

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fzabkar
 Post subject: Re: JPEG Repair Service
PostPosted: March 29th, 2016, 18:53 
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data-medics wrote:
The color is a little off, probably because the first bad sector was so near to the top of the picture there was very little to compare the color with. It's close enough that most people wouldn't notice the repaired spots at a glance.

That'll be $10 please. :lol: JK

Very nice! It seems like you're onto a winner.

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fzabkar
 Post subject: Re: JPEG Repair Service
PostPosted: March 30th, 2016, 17:57 
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I've been doing some experimenting with "progressive scan" JPEGs. These consist of several interlaced scans.

In some cases I can truncate the last 80% of the file without visibly affecting the image, at least to my eyes. The extent to which I can do this depends on the amount of detail in the image.

In the following example I truncate the last quarter of the test file:

Attachment:
test_Spildit_original_resized_progressive.jpg
test_Spildit_original_resized_progressive.jpg [ 234.54 KiB | Viewed 29920 times ]

Attachment:
test_Spildit_original_resized_progressive_trunc_2C810.jpg
test_Spildit_original_resized_progressive_trunc_2C810.jpg [ 178.02 KiB | Viewed 29920 times ]


In the next example the file is truncated by half:

Attachment:
CDC_progressive.JPG
CDC_progressive.JPG [ 96.61 KiB | Viewed 29920 times ]

Attachment:
CDC_progressive_trunc_B970.JPG
CDC_progressive_trunc_B970.JPG [ 46.36 KiB | Viewed 29920 times ]


Here the file is truncated to 20% of its size

Attachment:
JMicron_progressive.jpg
JMicron_progressive.jpg [ 251.2 KiB | Viewed 29920 times ]

Attachment:
JMicron_progressive_trunc_BEE0.jpg
JMicron_progressive_trunc_BEE0.jpg [ 47.72 KiB | Viewed 29920 times ]


The point at which successive scans begin and end looks like the following:

Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0000BEA0  D6 13 FD 5D DE 2D 55 5F DA A7 F2 AF FF C4 00 4A
0000BEB0  11 00 02 01 02 04 02 05 08 06 07 07 03 03 05 00
0000BEC0  00 01 02 03 00 11 04 12 21 31 13 41 05 22 32 51
0000BED0  61 10 14 23 33 71 81 91 A1 20 42 52 62 B1 C1 15

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michael chiklis
 Post subject: Re: JPEG Repair Service
PostPosted: April 17th, 2016, 17:32 
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We can start a new game here :)
Someone can upload a damaged pic here, then we try to repair it and upload output file, we will find out who is the best DR in pics repairing by comparing them
:lol: :lol: :lol:

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fzabkar
 Post subject: Re: JPEG Repair Service
PostPosted: February 13th, 2017, 15:24 
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http://www.hddoracle.com/viewtopic.php?t=1943&p=11616#p11616

Quote:
JPEG Repair Shop allows you to repair corrupt JPEG files by manipulating the internal structure of the JPEG file. This makes it possible to repair corrupt files, which would be impossible to fix in a normal image editor.

http://anderspedersen.net/jpegrepair/

How does it work?

The image data of JPEG is divided into small rectangular areas called MCUs (Minimum Coded Unit) which are encoded together. Because of the way JPEG files are compressed an error in an MCU is likely to be propagated to the remaining image data, either displacing the image or changing the colors. JPEG Repair Shop allows you to delete and insert MCUs and to automatically fix color errors.

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DecA
 Post subject: Re: JPEG Repair Service
PostPosted: October 23rd, 2021, 21:18 
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I would also like to take part in the JPEG repair tools competition. My version - https://www.youtube.com/watch?v=T4dzlY5VhaI
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Amarbir[CDR-Labs]
 Post subject: Re: JPEG Repair Service
PostPosted: October 24th, 2021, 4:38 
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DecA wrote:
I would also like to take part in the JPEG repair tools competition. My version - https://www.youtube.com/watch?v=T4dzlY5VhaI


Wow ,
That Software You Have Made Right

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Arch Stanton
 Post subject: Re: JPEG Repair Service
PostPosted: October 24th, 2021, 11:08 
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And yet .. It's hard to beat this freeware with these simpler cases. Jpeg Repair Shop is excellent provided not too much corruption (tends to crash a lot) and resolution not too high (tends to get really slow) https://youtu.be/ZI4KNexopiw

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