«

On Tue, 22 May 2012 11:03:27 -0700, Savageduck
<savageduck1@{REMOVESPAM}me.com> wrote:
: On 2012-05-22 09:34:41 -0700, sobriquet <> said:
:
: >
: > Hi.
: >
: > Does anyone have an explanation for the partial grid pattern visible in
: > the background of this picture (consisting of horizontal and vertical
: > lines)?
: >
: > http://i.imgur.com/EUJBA.jpg
:
: I am not sure that describing what you are seeing as a "partial grid
: pattern" is quite correct.
: Confirm that the areas I have marked are what you are talking about, so
: we are on the same page.
: < http://db.tt/MDPLIqNp >
:
: For now I can only guess that what you are seeing is some type of
: aliasing artifact. I am sure that others will have a much better idea,
: along with a possible fix.

My guess is a sloppy compression algorithm that results in one or more rows or
columns of pixels being jettisoned. In effect, it's roundoff error.

Bob

On 23/05/2012 5:08 PM, Martin Brown wrote:
> On 22/05/2012 19:47, James Silverton wrote:
>> On 5/22/2012 2:21 PM, sobriquet wrote:
>>> On Tuesday, May 22, 2012 8:03:27 PM UTC+2, Savageduck wrote:
>>>> On 2012-05-22 09:34:41 -0700, sobriquet<> said:
>>>>
>>>>>
>>>>> Hi.
>>>>>
>>>>> Does anyone have an explanation for the partial grid pattern
>>>>> visible in
>>>>> the background of this picture (consisting of horizontal and vertical
>>>>> lines)?
>>>>>
>>>>> http://i.imgur.com/EUJBA.jpg
>>>>
>>>> I am not sure that describing what you are seeing as a "partial grid


I have had this sort of thing its just the image has been corrupted and
the original is more than likely fine.

Mine have come from a slow transfer from media to media or multiple
transfers.

On 24/05/2012 05:05, Rob wrote:
> On 23/05/2012 5:08 PM, Martin Brown wrote:
>> On 22/05/2012 19:47, James Silverton wrote:
>>> On 5/22/2012 2:21 PM, sobriquet wrote:
>>>> On Tuesday, May 22, 2012 8:03:27 PM UTC+2, Savageduck wrote:
>>>>> On 2012-05-22 09:34:41 -0700, sobriquet<> said:
>>>>>
>>>>>>
>>>>>> Hi.
>>>>>>
>>>>>> Does anyone have an explanation for the partial grid pattern
>>>>>> visible in
>>>>>> the background of this picture (consisting of horizontal and vertical
>>>>>> lines)?
>>>>>>
>>>>>> http://i.imgur.com/EUJBA.jpg
>>>>>
>>>>> I am not sure that describing what you are seeing as a "partial grid
>
>
> I have had this sort of thing its just the image has been corrupted and
> the original is more than likely fine.
>
> Mine have come from a slow transfer from media to media or multiple
> transfers.

No. A corrupted JPEG stream looks entirely different and *must* change
state over a JPEG 8x8 block boundary. These don't.

--
Regards,
Martin Brown