My image is 1024 * 768. It's so slow.
But the www.picnik.com does it very well. It change the image data so
fast. Please try the Exposure function it the web. I just want to kown
how to do this.
Thanks
--- In flexcoders@yahoogroups.com, DreamCode <[EMAIL PROTECTED]> wrote:
>
> How big is the image
I can understand that if I use an overlay cover the image and change
the alpha to make it like exposure change. But if you check other
function in that website, such as sharpen, color, they also provide a
very quick responce to what you do at client side.
I agree that it must be done at client rat
Sorry, I don't understand what you said very clearly. Do you mean that
I should use the single whole ARGB unsigned int value but not a single
color value? I'm not very sure about the "32bit block" in you mail.
But I think some algorithm need to deal with R,G,B color separately.
Could you give me
regards,
> Muzak
>
> - Original Message -
> From: "Ralf Bokelberg" <[EMAIL PROTECTED]>
> To:
> Sent: Tuesday, December 04, 2007 10:53 AM
> Subject: Re: [flexcoders] Re: How to improve BitmapData processing
speed?
>
>
> > None of the effects at pic
Without pretending to have the inside track on how they do it - I'm fairly
sure they accomplish it by some combination of multiplication/division but
not on individual pixels, without having spent more than 45 secs looking
at it. There's also they option that the accomplish the "realtime" effect by
Of course they do a new image of that quality could not be delivered at
that speed. And I'm sure you understand the capabilities of an overlay
with solid colors, adjustable alpha and blend modes.
But if you don't believe me you could try to go to the exposure function
unplug your n
DISCARD THE PREVIOUS
Of course they do a new image of that quality could not be delivered at
that speed. And I'm not sure you understand the capabilities of an
overlay with solid colors, adjustable alpha and blend modes.
But if you don't bel
They do not do image manipulation on client side which only have poor API.
Since the source graphic is already on server, they use some tool (for example
ImageMagick) process it on server, and reload it for you.
Since you only need to see screen DPI photos, the file transfer speed + server
image
Well... a blur is not at pixel level either That can be handled in
blocks too I might see this fairly clear as I come from an ASM
background.. the thing you need to realize is that performing an action
on a 32bit block is not much slower that it is performing the same action of
a pixel
None of the effects at picnik is done with pixel level manipulations.
They are using Bitmap operations. I don't know, how exactly the
exposure effect can be achieved. I would try googling for Flash/Flex
experiments. I'm sure you can find somebody explaining/showing it.
Cheers
Ralf.
On Dec 4, 2007
I imagine it could be done by adding 2 layers filled with the same solid
greyscale value (one of the sliders determine the amount of grey i think)
. one layer having SCREEN as the blend mode and another set to LIGHTEN
or something like that fairly sure that could produce some nice
tweaks...
December 04, 2007 10:53 AM
Subject: Re: [flexcoders] Re: How to improve BitmapData processing speed?
> None of the effects at picnik is done with pixel level manipulations.
> They are using Bitmap operations. I don't know, how exactly the
> exposure effect can be achieved.
Oh and there's this one (it's linked from Grant's article as well)
http://www.quasimondo.com/archives/000565.php
- Original Message -
From: "Ralf Bokelberg" <[EMAIL PROTECTED]>
To:
Sent: Tuesday, December 04, 2007 10:53 AM
Subject: Re: [flexcoders
ite somewhere as well.
> Just google ;-)
>
> regards,
> Muzak
>
> - Original Message -
> From: "Ralf Bokelberg" <[EMAIL PROTECTED]>
> To:
> Sent: Tuesday, December 04, 2007 10:53 AM
> Subject: Re: [flexcoders] Re: How to improve BitmapData processing
spee
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