[Digikam-users] Re: aspect ratio crop tool

[sleepless]

Yes it is!
Rinus
Op 16-05-11 19:22, Gilles Caulier schreef:
> So, this entry still valid ?
>
> https://bugs.kde.org/show_bug.cgi?id=273433
>
> Gilles Caulier
>
> 2011/5/16 Dan McDaniel<dan at dm3.us>:
>> On Mon 16.May.11 13:03, David Kerber wrote:
>>> On 5/16/2011 12:51 PM, Remco Viëtor wrote:
>>>> on Monday 16 May 2011, David Kerber wrote:
>>>>> On 5/16/2011 11:42 AM, Dan McDaniel wrote:
>>>>>> I have noticed that very often the Aspect Ratio Crop Tool does not crop
>>>>>> accurately, but will be off by pixel.  So, for example, if I want  a 5:4
>>>>>> aspect ratio which should be 1.25 the crop will be off by a pixel and
>>>>>> give a ratio of 1.2499 or such.
>>>>>>
>>>>>> This small difference does not affect the look of the image, but when I
>>>>>> send it to the photo service to be printed the software detects that it
>>>>>> is not in the correct ratio and each time I have to tell it that it's OK
>>>>>> to crop the image.
>>>>>>
>>>>>> Has anyone else noticed this? I'm using 1.2.0 on Debian and 1.9.0 on
>>>>>> Fedora and both exhibit this behavior.
>>>>>>
>>>>> Are your originals' sizes such that 1.25 will give an exact pixel
>>>>> result, and not have to be rounded either up or down to get to a whole
>>>>> pixel?
>>>>>
>>>> the size of the original isn't important, the size of the crop is:
>>>> if you take a length of 1003 pixels, there's no way you can get the 5:4 ratio
>>>> exact on pixel level, as we only use whole pixels: you'd have to make the long
>>>> edge either 1000 (giving 800 for the short side) or 1005 (804 for the short
>>>> size).
>>> Yes, true.  It looked to me like the OP was leaving on of the dimensions
>>> of his original image unchanged, and trying to crop only the other
>>> dimension.  That would work only if the original dimensions were such
>>> that a factor of multiplying or dividing by 1.25 would give an integer
>>> result.
>>>
>> No, I was trying to crop a box out of the original at the selected
>> aspect ratio and was puzzled when it didn't crop exactly. Checking the
>> option box makes it work as I expected it to work by default.
>>
>> Thanks to all who replied.
>>
>> Dan
>>>> Already in 1.9.0 (and a few versions before iirc) there is the 'exact ratio'
>>>> option, which indeed limits the sizes you can pick so that you get the exact
>>>> ratio specified.
>>> I didn't know that; it would be handy.
>>>
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>>
>>
>> --
>> Dan McDaniel
>> Key fingerprint = CAEC B8D9 3701 86CF D3B2  1E99 D8BB F217 455C AD36
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