On Jul 2, 2010, at 3:39 PM, Chuck Norcutt wrote:
> I'm having trouble here since parts of the story (as I understand it)
> don't seem to add up. The clarifications you've added on this message
> and the previous one say the problem exists with the images as they are
> stored on the card because the corrupted images move wherever the card
> goes. Or is it maybe the reader? Does the reader move with the card?
> If that's true it's the camera, the card or the reader... it can't be
> the computer. However you have also stated that, after a download,
> images on the same computer displayed by one application are corrupted
> but on another application they are not. That says one of the apps is
> corrupting an otherwise fine image. It can't be both ways... or if it
> is you have a truly confused problem scenario.
Sorries, was posting about two diff times this happened. The first time (last
month or so), all the pics on card, in camera, looked ok. Put card in
cardreader, Mac saw partial images (most were less than 1/4th). Same
card/reader on another mac, and finally a PC, same results, partial images.
2nd time (yesterday), images reviewed on camera fine, but on mac showed as
partials in finder, complete in iphoto. if i exported them out of iphoto (after
importing them), they showed up complete images.
>
> You haven't used any recovery software on this card have you? The
> scenario you describe (some JPEG images are truncated) can happen if you
> delete images on the card while you're shooting and the directory is
> later lost due to reformatting or other problems. With the directory
> gone or damaged the recovery software may not be able to figure out
> where some images start and end because (due to the intermediate file
> deletions) the image storage may not be in contiguous clusters. Trying
> to read these back may produce only the first part of an image leaving
> some amount of the bottom portion chopped off. The rest of the image is
> probably still there but the software can't figure out which intial
> image fragment it belongs to.
The only time I ran recovery app was when I lost the entire dance shoot.
Couldn’t recover any dance images (oddly, could recover photos from prior
shoots). I rarely delete images on camera, and never via Explorer/Finder.
Standard procedure is to first copy or import all the photos to computer, put
card back in E3, and delete all (or more recently, format card, just because).
I wonder if turning off the camera right after a burst of images had anything
to do with it? It was just a power off via rear switch, not a battery-dying
power off.
>
> Chuck Norcutt
>
>
> siddiq@xxxxxxx wrote:
>> On Jul 2, 2010, at 2:09 PM, Chuck Norcutt wrote:
>>
>>> Now I'm totally confused. The first part says the images were
>>> transferred to the computer OK but something unusual happened to
>>> them after they got there. The second part says the problem moved
>>> to a different computer along with the card and reader. Got a
>>> different card or reader?
>>
>> The first time this happend (last month I think), I did try taking
>> the card/reader to a PC and another Mac to eliminate my own machine
>> out of the loop. all three machines showed the same partial image.
>> Mac 10.5, 10.6 and WinXP/sp3
>>> Also I don't know what it means (physically) to "re-export" an
>>> image from the iphoto library on a Mac. I don't know if that means
>>> the image was physically copied to a different place or only that a
>>> pointer to it was handed off. There are different implications of
>>> each.
>>
>> importing copies to the applications photo library/database, so
>> diff/new file, not a pointer to the same one
>>
>>> Chuck Norcutt
>>>
>>>
>>> siddiq@xxxxxxx wrote:
>>>> Re-exported the images from iphoto library, opened in
>>>> preview/finder, and they looked fine! last time around, they were
>>>> bad in preview so couldn’t even import.
>>>>
>>>> tried the same card, in the card reader, on another Mac, and a
>>>> PC, same deal, partial images.
>>>>
>>>> On Jul 2, 2010, at 1:43 PM, Chuck Norcutt wrote:
>>>>
>>>>> On the surface at least it sounds like the preview/finder
>>>>> application is corrupt. Can it be reinstalled? There are two
>>>>> more possibilities I can think of. Since you're using a Mac
>>>>> (which has more integrated code than typically found on a PC)
>>>>> there could be a common subroutine used by the preview/finder
>>>>> that is used by other applications. If that's true and that's
>>>>> where the problem is it may show up on other Mac image
>>>>> applications. The second possibility is that your computer has
>>>>> a physical memory corruption problem that only shows up at
>>>>> certain addresses. That means that whether preview/finder
>>>>> shows the problem or not depends on where in memory it's loaded
>>>>> or where its image memory is allocated. Try loading more stuff
>>>>> ahead of your image apps in order to cause memory allocations
>>>>> to change. Does the behavior of preview/finder change?
>>>>>
>>>>> Chuck Norcutt
>>>>>
>>>>>
>>>>> siddiq@xxxxxxx wrote:
>>>>>> Hi Chuck;
>>>>>>
>>>>>>
>>>>>> On Jul 2, 2010, at 10:17 AM, Chuck Norcutt wrote:
>>>>>>
>>>>>>> Time for some diagnostic work and some questions.
>>>>>>>
>>>>>>> Are you shooting raw? If so do you know anything about the
>>>>>>> file structure of an E3 raw file. Or are you shooting
>>>>>>> JPEG? When the images display on the LCD can you magnify
>>>>>>> them?
>>>>>> JPEG, and yes, can magnify just fine on camera.
>>>>>>
>>>>>> <snip>
>>>>>>> What you have to figure out is whether what the camera is
>>>>>>> writing is corrupted or what's being read back is what's
>>>>>>> corrupted or if its your computer or reader that's doing
>>>>>>> the corruption on either the initial read/write or the
>>>>>>> later read back.
>>>>>> First time (when I lost all the photos, only 1/5 showing,
>>>>>> rest just gray blank), I transferred the photos via a Sandisk
>>>>>> USB2 multicard reader (which I’ve been using for years). 2nd
>>>>>> time (last night) was E3>Macbook Pro vis USB.
>>>>>>
>>>>>> I just discovered something else: The photos are fine when
>>>>>> imported/viewed in iPhoto, but are ‘corrupt’ (aka only
>>>>>> partially visible, rest gray blank) when opened up in
>>>>>> Preview/Finder (i guess the PC equivalent is Windows
>>>>>> Explorer). Very odd.
>>>>>>
>>>>>>> The first thing to do is replace the card with another one.
>>>>>>> Do you see the same thing? If not it's the card. If so
>>>>>>> you need to test different modes. If you were shooting raw
>>>>>>> try JPEG or vice-versa or even raw + JPEG. Can you read
>>>>>>> back and magnify and see the entire image on the LCD. That
>>>>>>> means not just viewing the image immediately after it was
>>>>>>> taken (probably still in an internal buffer) but also
>>>>>>> switching to display mode on the camera and being able to
>>>>>>> step through multiple images and fully magnify them on the
>>>>>>> LCD. If this works on the second card but not on your
>>>>>>> original then it's the original card. If it doesn't work
>>>>>>> on the second card then the problem is with the camera. If
>>>>>>> the test (including fully magnifying more than one image on
>>>>>>> the LCD) works on both cards then you've got a problem with
>>>>>>> your computer or the card reader being used.
>>>>>> At this point I’m starting to suspect the computer, or rather
>>>>>> the application. Makes no sense, but more sense than either
>>>>>> the card, or camera. Why else would one application show the
>>>>>> photos fine, another not?
>>>>>>> My 5D can't do it but I seem to recall that the E3 can do
>>>>>>> an in-camera raw to JPEG conversion. Does that work?
>>>>>> Not sure, never shot raw :(
>>>>>>
>>>>>>> Chuck Norcutt
>>>>>>>
>>>>>> Thanks!
>>>>>>
>>>>>>> siddiq@xxxxxxx wrote:
>>>>>>>> G’day all;
>>>>>>>>
>>>>>>>> Not for the first time, I’m seeing only a third, or ⅔, of
>>>>>>>> an image when I download them from the E3. They display
>>>>>>>> fine on the LCD, but when I copy them to laptop, only see
>>>>>>>> partial.
>>>>>>>>
>>>>>>>> One time I lost an entire dance photo shoot, and had to
>>>>>>>> call as many dancers as I could for a redo the next day
>>>>>>>> (promotional poster for them).
>>>>>>>>
>>>>>>>> This time it wasn’t as critical, but I’m starting to get
>>>>>>>> worried. Is this something E3 related, or card related,
>>>>>>>> you think?
>>>>>>>>
>>>>>>>> Thanks.
>>>>>>>>
>>>>>>>> /s
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