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03-17-2015, 05:38 PM   #1
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New K-3 User-Image Corrupted in Computer

I have purchased a K-3 used with the 18-135 and 80-300 zoom lenses. It had only 275 accuations. Lucky, I know.

I took the K-3 on vacation. Some of the images downloaded into the computer have been corrupted in the download process. About 7 or 8 out of the 800. The image is fine in the lcd of the camera however.

The JPEG image is split into tiles of undetermined size and shuffled like a rubics cube. Does anyone have any ideas what causes this?

A couple of examples have been attached.

Attached Images
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
03-17-2015, 06:25 PM   #2
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Hi, Welcome to the Pentax Forums!

The cause could be several things:
  • SD card not proper
  • Poor cable connection (if using a USB cable to transfer the files)
  • Card reader issues (if using a card reader)
  • The computer software you are using to display the image
Are these in-camera JPEGs or RAW captures?


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03-17-2015, 06:28 PM   #3
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Weird. I don't have an answer but some thoughts.

First are these jpeg or RAW images? If RAW remember you are only looking at the jpeg preview on the camera.

To get from your camera to the computer the files must pass through several places and any of those might be the source of the issue.

Camera card reader
SD card
Computer card reader (or if you use a cable, the cable and the USB port)
Software that you are viewing or post processing the images on.

I would only be guessing but I would look carefully at the SD card as the most likely suspect. How old is the card? What brand? Has it been formatted in your camera?

Without knowing more about your workflow (jpeg or RAW, cable or card reader, card specifications, software used) these are only things to think about not answers.
03-17-2015, 07:38 PM   #4
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QuoteOriginally posted by jatrax Quote
Has it been formatted in your camera?
...and also important, has it been formatted by your computer?


Steve

03-17-2015, 08:21 PM   #5
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JPG preview thumbnail can be intact even when the file is damaged as far as I understand it. Try transferring those files again using a different method/cable/reader/etc.
03-17-2015, 08:27 PM   #6
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I've seen this a number of times over the years from friend's cameras, in those cases it's always been a bad SD card.
But if you are transferring via USB, you may have bigger problems
03-17-2015, 08:36 PM   #7
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QuoteOriginally posted by jatrax Quote
If RAW remember you are only looking at the jpeg preview on the camera.
As far as I know, that's also the case for the jpegs. After all, why display a full size HQ jpeg image on a mini LCD
03-17-2015, 08:50 PM   #8
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QuoteOriginally posted by sterretje Quote
As far as I know, that's also the case for the jpegs. After all, why display a full size HQ jpeg image on a mini LCD
Because you can ZOOOOOOOOM to check your photo..

EXIFtool can help here

This is an extract from a Q dng file, but the K-01 and the K-50 are the similar, I'd assume the K-3 too.

RED is the raw data
BLUE is the JPG data (used for the preview on the LCD. Also many editors show the JPG first, FASTSTONE for example)

Subfile Type : Full-resolution Image
Image Width : 4064
Image Height : 3000
Bits Per Sample : 12
Compression : Uncompressed

Photometric Interpretation : Color Filter Array
Strip Offsets : 182638
Samples Per Pixel : 1
Rows Per Strip : 3000
Strip Byte Counts : 18288000
X Resolution : 300
Y Resolution : 300
Planar Configuration : Chunky
Resolution Unit : inches
CFA Repeat Pattern Dim : 2 2
CFA Pattern 2 : 1 0 2 1
CFA Layout : Rectangular
Black Level Repeat Dim : 2 2
Black Level : 0 0 0 0
White Level : 4055
Default Scale : 1 1
Default Crop Origin : 0 0
Default Crop Size : 4000 3000
Bayer Green Split : 0
Anti Alias Strength : 1
Active Area : 0 0 3000 4000
Subfile Type : Reduced-resolution image
Image Width : 4000
Image Height : 2664
Bits Per Sample : 8 8 8
Compression : JPEG
Photometric Interpretation : YCbCr


Note this is NOT RAW+JPEG, I only shoot RAW.


Last edited by Steve.Ledger; 03-17-2015 at 09:32 PM.
03-17-2015, 09:48 PM   #9
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QuoteOriginally posted by Steve.Ledger Quote
Because you can ZOOOOOOOOM to check your photo..
For me, it's still not enough to really judge the sharpness of the image
03-17-2015, 10:41 PM   #10
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To be honest, I actually find it quite fine for checking sharpness, my default zoom on the K-01 and K-50 is 8x which I believe is 100%
03-18-2015, 05:17 AM   #11
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This thing happened to me last summer to a single photo and only to JPEG file ( i was shooting RAW+). It's not a computer software problem, because i used 3 different programmes with the same result.(Digital camera utility 5, displayed the thumbnail preview OK, but refused to open the file) I don't remember which sd i was using at the time, and i transfer the photos to the pc using the inbuilt cardreader. Since then i've taken about 2000 photos without the problem happening again. The camera i was using was a K3.
03-18-2015, 11:17 AM   #12
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Wow-Make a post, go to bed, 10 responses!

I was shooting both JPEG and RAW (DNG).

I believe that both cards, because they were new, were formatted in the K-3. However, I also got a Fujifilm X10 at the same time so there is a chance that one of them was formatted by the X10. I would not have known that the formatting of the card was such a sensitive issue until I read the posts above. I have previously used cards interchangeably between different cameras once they were formated by one of them. So that is something new and obviousloy important to know. I'll be very careful about formatting the card for use in a specific camera.

Camera slot 1 (the RAW designation) held a SanDisk Ultra PLUS XC 64Gb Class 10, 48M/sec. The JPEG assignment in slot 2 was a Lexar Professional HC Class 10 32 Gb 600x Speed.

The SD card was directly inserted into the SD slot of my laptop for transfering to the computer which is a Windows 7 machine.

I hope that this answers a few of the questions in the posts above, but it looks to me like the files are corrupted and probably because of the SD card formatting or a bad card. I'll try to investigate further this evening.

Thanks to all who helped.
03-18-2015, 12:04 PM   #13
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I would take a while guess that normally image defects due to stupid SD card. I had several cheap SD card don't work properly. They either saved into corrupted image, or image does exist but preview can't display. Or sometimes have weird color cast!! not all SD created equal!

I often became a habit that when insert into camera I do a format on camera first. format sometimes get rid of these weird issues... of course, since it's SD card, so the issue could also the connector between camera to SD card, could be processing...etc...
03-18-2015, 02:48 PM   #14
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RAW files are OK

I just checked the RAW files and they appear to be fine. Thanks for all the help. Fred

---------- Post added 03-18-15 at 06:20 PM ----------

If the computer directory of the SD card has the label "K-3" does that mean that I used the K-3 to format the card? Just starting to clue in, I hope.
03-18-2015, 03:40 PM   #15
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Might be computer virus, I got similar virus couple of years ago, do not remember its name right now, it slashed graphic files in the directories I was opening


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QuoteOriginally posted by cfbuck Quote
Some of the images downloaded into the computer have been corrupted in the download process.
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