Re: TImageScrollBox AntiAliased OnProgress event? AntiAlias performance with large tiffs -- Envision Support Forum

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Date Posted: 12:14:57 05/04/06 Thu
Author: Brian
Subject: Re: TImageScrollBox AntiAliased OnProgress event? AntiAlias performance with large tiffs
In reply to: Michel 's message, "Re: TImageScrollBox AntiAliased OnProgress event? AntiAlias performance with large tiffs" on 20:56:10 05/01/06 Mon

Hi Michel,

I know the feeling, about hours in the day.
Our biggest image is probably around 44000 x 26000 pixels(300dpi tif) AntiAlias transform probably takes around 10 - 15 seconds.

Thanks for your reply. Any ideas would be greatly appreciated.

- Brian

>
>Hi Brian,
>
>Sorry for my lack of support. Just wish there were
>more hours in a day.
>
>How big are you images?
>
>I will make note to make the antialiastransform in
>TimageScrollBox public to allow setting the progress
>event handler.
>
>Michel
>
>
>>I was able to solve by publicizing protected
>>FAntiAliasTransform object in TImageScrollBox class.
>>
>>However, if anyone has any suggestions on improving
>>AntiAliasTransform performance, please let me know.
>>
>>Thanks,
>>Brian
>>
>>>Hi -
>>>
>>>I'm displaying very large tiff images using
>>>TImageScrollBox with AntiAliased = True. I'd like to
>>>capture the OnProgress event during AntiAliasing as
>it
>>>is taking a long time due to the size of my images.
>>>However, I haven't found a way to capture this event
>>>other than using TAntiAliasTransform (instead of the
>>>TImageScrollBox.AntiAliased property). However,
>>>TAntiAliasedTransform does not seem to do nearly as
>>>good a job at AntiAlias as
>TImageScrollBox.AntiAliased
>>>property.
>>>
>>>On a side note, does anyone have any recommendations
>>>on ways to improve AntiAlias performance?
>>>
>>>THanks,
>>>Brian

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