PNG 24-32 Transparency problem

I've just purchased CS3 Design Premium and I'm trying to
recreate a few pages using DW. When I add an image to a page I can
not get a transparency setting for the 24 bit or 32 bit PNGs in the
Image Preview pane. I can for 8 bit PNG or GIF, but the header I am
working with has some drop shadowing and looks horrible in less
than 24.
Is this a setting thing or something? Or does DW just not
support the use of transparency in 24-32 PNG?

IE < 7 doesn't render alpha transparency correctly. It
produces an off
color box around the image. But if your image isn't a
background image, you
can use a pngfix.js to force IE6 to render properly. As to
why it isn't
rendering properly in DW, I don't know for sure. My
transparent png-24
images look fine in DW8 - with or without the png fix.
www.homepage.ntlworld.com/bobosola/pnghowto.htm
--Nancy O.
Alt-Web Design & Publishing
www.alt-web.com
"Chris_Rehm" <[email protected]> wrote in
message
news:fcs84i$i9d$[email protected]..
> I've just purchased CS3 Design Premium and I'm trying to
recreate a few
pages
> using DW. When I add an image to a page I can not get a
transparency
setting
> for the 24 bit or 32 bit PNGs in the Image Preview pane.
I can for 8 bit
PNG or
> GIF, but the header I am working with has some drop
shadowing and looks
> horrible in less than 24.
>
> Is this a setting thing or something? Or does DW just
not support the use
of
> transparency in 24-32 PNG?
>

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Half a decade later, I am getting the same problem as the original poster (although I am using Illustrator CC 64bit on Windows 8).
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I am attempting to export a PNG 8 image with alpha transparency using Fireworks 11.1.0.205 on Windows 7 64-bit. When I attempt to optimize the image to PNG 8, Adaptive with Alpha Transparency and rebuild the palette it crushed the palette down. The image is a grayscale image and the bug appears similiar to the one reported here http://blogs.adobe.com/sarthak/2010/09/png-8-export-color-palette-issues.html.
Here is a screen cast of someone doing what I want to do, http://brenelz.com/blog/png-8-alpha-transparency-screencast/ (fast forward through the parts of him editing HTML).
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I do not appreciate your condescending tone. I have attempted all of your instructions. Embedded is a window capture of my graphic on a TRANPARENT canvas with your suggested settings. Also embedded is the resulting graphic. Finally, embedded is the original graphic that demonstrates what I am attempting to achieve.
Transparent Canvas
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Original image
I'm disappointed that you cannot be bothered to attempt to recreate the problem and post evidence to back up your claims.
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Hi all ,
We are trying to acheive transparency for 3D models. When
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Hi,
I am having similar problems. I have read somewhere that png format can not handle CMYK colorspace anyway, which I find odd (and plainly stupid IM(NS)HO) which would mean that converting to RGB and therefore using profiles is mandatory.
May be you should check if the internal format of the png files claims it is RGB or CMYK (using ImageMagick's "identify" command for example).
HTH
JG

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Png files with transparent background show black only in firefox for android

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Hi evelswoman,
Thank you for your question. This sounds like a good one for the web compatibility team. Currently there are some compatibility documentation for background-image here: [https://developer.mozilla.org/en-US/docs/Web/CSS/background-image] and more details on background: [https://developer.mozilla.org/en-US/docs/Web/CSS/background]
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Why can't I export a 24 bit PNG with alpha transparency?

I have just upgraded my Macromedia Studio 8 to Adobe CS3, and
it seems that I still can't export a 24 bit png with transparency
from Fireworks (Photoshop can do it, but it's just not suited for
volume graphic production). Anyone know something I don't, or can
someone at least explain why I can have alpha transparency on 8 bit
and 32 bit, but not 24 bit pngs? Currently, I'm planning to export
everything from Fireworks, then batch-process through Photoshop to
reduce from 32 bit to 24 bit, which is just... gah! Words fail
me.

Kathleen13 wrote:
> I have just upgraded my Macromedia Studio 8 to Adobe
CS3, and it seems that I
> still can't export a 24 bit png with transparency from
Fireworks (Photoshop can
> do it, but it's just not suited for volume graphic
production). Anyone know
> something I don't, or can someone at least explain why I
can have alpha
> transparency on 8 bit and 32 bit, but not 24 bit pngs?
Currently, I'm planning
> to export everything from Fireworks, then batch-process
through Photoshop to
> reduce from 32 bit to 24 bit, which is just... gah!
Words fail me.
>
If I'm correct, 8-bit png supports index transparency just
like GIF's
do. 32-bit png's support alpha channel transparency, so you
can get
variable or partial transparency in a full color image(8 bits
for each
color and 8 bits for an alpha channel) and 24-bit png's are
similar
jpegs, only you get lossless compression and no user-defined
settings.
So essentially, when you export a 32-bit png file you are
exporting a 24
bit color image with an 8-bit alpha channel.
Jim Babbage - .:Community MX:. & .:Adobe Community
Expert:.
Extending Knowledge, Daily
http://www.communityMX.com/
CommunityMX - Free Resources:
http://www.communitymx.com/free.cfm
.:Adobe Community Expert for Fireworks:.
news://forums.macromedia.com/macromedia.fireworks
news://forums.macromedia.com/macromedia.dreamweaver

.png transparency- problem with underlying layer control

I have an opaque orange rectangle with a clear uneven square cut into it through which I am displaying a slideshow (Spry Image Slideshow) and it works fine except that I cannot control the slideshow with my cursor. I can control the slideshow fine when it is on top of the rectangle, but I want the cutout to act as a frame on top of the slideshow.
Is the transparency in the .png akin to a sheet of glass? If so can I access the controller somehow through the "glass" with some added code?

Hi
You cannot place a 'layer' over the slideshow, as this 'layer', (Is this an ap div?) will then 'have focus' above the slideshow and anything underneath this, (the slideshow controls) will not be selectable.
You could program your own event handlers in javascript to control the slideshow, but this will require you to have a reasonable understanding of javascript programming.
PZ

Problem with reduction Of an PNG Image with transparent background

I have an PNG Image on my computer with a transparent background that I would like to reduce 50% and save it back to my computer can you tell me how to achive this?

Are you looking to reduce the size (pixel dimensions) by 50% or reduce the file size by 50%?
If you want to reduce the actual image size (pixel dimensions) you could go to Image>Image Size
and check resample image with constrain proportions and then enter 50 in the pixel dimensions at the top after setting
the drop-down to percent.
Or use file Save for Web and enter 50 under the percent under image size.
As far as saving you could use File>Save As in photoshop and choose png or File>Save for Web>png
(save for web usually results in smaller file sizes)

Save For Web transparency problem: Overprint & CMYK documents

OK, I had a weird problem crop up today (as far as I can tell) completely out of the blue.
When I am working in overprint preview mode in a CMYK document, and I attempt to save an artboard as a PNG w/ transparency (via Save for Web), illustrator forces a white background throughout the image. It didn't do this until this morning. Yesterday, it was working perfectly normally. I put the computer to sleep at the end of the day, woke it up this morning, and for some reason this behavior has changed.
It does not do this if the document is in RGB mode, or I have the transparency grid shown, or not in overprint preview mode. (I work in this mode because for some reason having it in standard preview shows very strange artifacts when working with raster effects, which drives me crazy)
I'm on a Mid 2014 MBP Retina, 2.5 GHz Intel Core i7, 16GB 1600MHz DDR3 w/ NVIDIA GeForce GT 750M 2048MB, running illustrator CC 2014.1.1.
I have tried uninstalling, reinstalling, restarting the computer, resetting all settings, as well as changing document settings, and editing artboard settings. And yes, the transparency checkbox is checked in the Save For Web dialog.
Any ideas?

brnscreative,
Have you tried 4) and 6) on the list?
4) is more thorough than 3), and 6) is the full reinstallation.
The following is a general list of things you may try when the issue is not in a specific file, and when it is not caused by issues with opening a file from external media. You may have tried/done some of them already; 1) and 2) are the easy ones for temporary strangenesses, and 3) and 4) are specifically aimed at possibly corrupt preferences); 5) is a list in itself, and 6) is the last resort.
If possible/applicable, you should save current artwork first, of course.
1) Close down Illy and open again;
2) Restart the computer (you may do that up to at least 5 times);
3) Close down Illy and press Ctrl+Alt+Shift/Cmd+Option+Shift during startup (easy but irreversible);
4) Move the folder (follow the link with that name) with Illy closed (more tedious but also more thorough and reversible), for CS3 - CC you may find the folder here:
https://helpx.adobe.com/illustrator/kb/preference-file-location-illustrator.html
5) Look through and try out the relevant among the Other options (follow the link with that name, Item 7) is a list of usual suspects among other applications that may disturb and confuse Illy, Item 15) applies to CC, CS6, and maybe CS5);
Even more seriously, you may:
6) Uninstall (ticking the box to delete the preferences), run the Cleaner Tool (if you have CS3/CS4/CS5/CS6/CC), and reinstall.
http://www.adobe.com/support/contact/cscleanertool.html

Using PNG files with transparent background - Please Help

I just purchased Elements to do a very specific task which I can’t do in Aperture. I am a former photoshopper (V.5) and excited to be back.
I am doing a book/scrapbook and the majority of my text will be my own handwriting. I use white paper and black ink and I scan in at the highest settings. My goal is to create my handwriting on a transparent background so I can place it in my book as I choose. For this specific project (which is very large in scope) I wanted to keep my image/file management within Aperture.
So I import my file (of my handwriting) from Aperture and successfully saved with a transparent background. Adobe said I had to save it as a PNG file. I noticed when I saved in Photoshop there was a warning saying I had to save as a copy.
Aperture does not see the file when I try to import it back. My interchange between aperture and photoshop is fine otherwise. This problem only seems to be with “unflattened” layered images. When I flatten the image it is recognized by Aperture, but I lose the transparent background in Photoshop.
If anyone sees flaws here or has a suggestion to “isolate” and save my personal handwriting image files I would greatly appreciate it. Thanks!

Would probably work best if you first export from Aperture as PSD (if possible, like Lightroom) and then save to preserve layers.
From the PSD save as PNG24 rather than PNG8 which is better for preserving transparency.

PNG 24-32 Transparency problem

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