Problems with alpha

imported a alpha with white background made background transparent by useing modify - multiply but the image is very transparent how can i make it look solid any suggestions welcome

>imported a alpha with white background
Imported an alpha, what? Animation? Still image?
If it's a still image, open it in Photoshop and remove the white background, then save it in one of the formats that supports background transparency like TIFF, PSD or PNG.
-DH

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Question: Quick Look in Finder; problems with alpha channels

Hi
"Quick look" in Finder is great for quick presentations of a folders selected contents but it only works with images that contains no alpha channels or masks. Is there any way to work around this to display say PhotoShop documents with alpha channels? Or any plug-ins/applications that can help?
thanks.

This has been broken forever in OS X, and I don't know why, because it used to work just fine. I suspect the engineers did something to QuickTime that causes this problem, but it has been borked for so long I don't remember when the ability to correctly display files went wrong. I just remember that once upon a time all sorts of things from Apple worked correctly in displaying such files, but pretty much nothing does now. This includes the Finder, Preview, QuickLook, and various third-party image browsers that use Apple's own system level image handling abilities, such as VitaminSee or CocoaViewX. When I need to actually see what's there, I browse with Adobe's Bridge.
Francine
Francine
Schwieder

Problem with alpha of pixels

Hi, i've a little problem, i've a method that get the pixels of an bufferedimage and set they to black or white values. My problem is only with the PNG files, i don't succeed to remove the transparence and when i show the image into my panel the black part is not completely black but there's still a transparence.
My bufferedimage's name is "sorgente" and this is the code of method.
<CODE>
boolean test_image (){
int w = sorgente.getWidth();
int h = sorgente.getHeight();
int[] rgbs = new int[w*h];
String ttmp = "";
int w_img = sorgente.getWidth();
int h_img = sorgente.getHeight();
int pixelCache, r, g, b, alpha;
for (int i = 0; i < w_img; i ++){
for (int j = 0; j < h_img; j ++){
pixelCache = sorgente.getRGB(i, j);
r = (pixelCache >> 16) & 0xff;
g = (pixelCache >> 8) & 0xff;
b = pixelCache & 0xff;
alpha = (pixelCache >> 24) & 0xff;
if (!((r == g) && (g == b)))
return false;
if ((r != 255) || (r != 0)){
if (r < 160){
sorgente.setRGB(i, j, 0x00000000);
} else {
sorgente.setRGB(i, j, 0xffffffff);
return true;
</CODE>
THANKS

sorgente.setRGB(i, j, 0x00000000); sets the alpha channel to transparent. Try setting the color to 0xFF000000

Problem with Alpha Channel

The top level track on my project contains an alpha channel. However, being the top level track the tracks below it are invisible.
I have read the "Compositing, alpha channels, and adjusting clip opacity" page. It tells me that I "can choose how to interpret the alpha channel in a file in the Interpret Footage dialog box. Choose Invert Alpha Channel to swap areas of opacity with areas of transparency, or choose Ignore Alpha Channel to not use the alpha channel information at all."
However, when I do this (ie. inverse the alpha channel in the asset) I get the following before and after results:
Summary of goal: I want to adjust the transparency of the top track so that the lower tracks appear.
Help.

If you want to adjust the transparency of a clip, you modify its Opacity property.
Changing the alpha channel properties in the Interpret Footage settings is for when the alpha channel of an asset is not being interpreted/used correctly by the application.

Texture problem with alpha channel

[code]
on createMySphere
sr= p3d.newModelResource("mySphere01", #sphere)
s = p3d.newModel("s", sr)
s.transform.position = vector (0,0,0)
s.shader = p3d.newShader("sShdr2", #standard)
txS= p3d.newTexture("txS", #fromcastmember, member("image"))
s.shader.textureList[1] = txS
sr.radius = 100
sr.resolution =60
end
[code]
im using png image format for textures, because i want to
make user to its alpha channel. The problem comes when the image
has the alpha, The sphere disappears no matter how the alpha is
painted.
how do i make use of the alpha channel, it doesn't even have
to be in the same image.

thanks i used #both on my sphere it shows up but i dont see
the image only black the other side.
i used it on my plane and the texture is gone.
on createPlane
planeR = p3d.newModelResource("plane01", #plane)
planeO = p3d.newModel("planeO", planeR)
planeO.transform.position = vector (0,0,0)
p3d.model("planeO").visibility = #both
planeO.shader = p3d.newShader("pShdr", #standard)
txPlaneO = p3d.newTexture("txPlaneO", #fromcastmember,
member("Asphalt10"))
planeO.shader.textureList[1] = txPlaneO
planeR.width = 5000.0
planeR.length = 5000.0
planeO.rotate (90, 90, 0)
end createPlane

Problem with aLpha channel export to quicktime

Hi! after hours of trying this here is my last hope:
I masked an imported qt-movie with chroma key a person in FCE 4. That was fine. But when I export Quicktime (million+, without compressor, etc.) there is no alphachannel anymore. I need that for the web (FLV). I f I export FLV FCE freezes at 0%.
I am shure out there is somebody who has an idea. Pleaes

Do not render the contents of the sequence. If you render, the sequence is exported using the render files. With the sequence unrendered export using the Animation codec with colors set to millions+.

Problem with Triple Exponential Smoothing in HANA

Dear All,
I have a problem with one of PAL procedures!
Currently, I am using FORECASTSMOOTHING with Triple Exponential Smoothing from SAP HANA Predictive Analysis Library (PAL). I am working with hourly data and I am testing this procedure only on 6445 records.
I have a problem with cycle parameter that I can't overcome...
When the cycle parameter is setted to 24 (hourly data) I can use only 4267 records from my input table. Even one record more generates error: “Could not execute 'CALL _SYS_AFL.PAL_TSF_TMH(TMH.INPUT_DATA_TS_F, "#PAL_CONTROL_TBL_TS", TMH.PAL_OUT_TS_F, ...' in 383 ms 461 µs . SAP DBTech JDBC: [2048]: column store error: search table error: [2620] _SYS_AFL.AFLPAL:FORECASTSMOOTHING: [135] (range 2) AFLFunctionFatal exception: PAL error[73001502]:Ahead exception throw out, Check trace for details”.
But when I change cycle to 5 or less I can use as many records as I want. Have you ever had such problem? I hope you could help.
Regards,
Wiola

Hi Arvind,
in my PAL code i don't let HANA to presume the time interval, like you said I just sorted rows in my table and I defined cycle (24).
Strange is that my code perfectly works with less than 4267 rows.
Maybe there is some problem with alpha, beta and gamma parameters optimization with more data... but I don't know how to manage it.
This problem only occurs when I try to use Forecast Smoothing with large amount of data, in other algorithms like Double Exponential Smoothing or Triple Exponential Smoothing everything works well. Major difference between this algorithms is alpha, beta and gamma parameters optimization. Only in Forecast Smoothing they are optimized.
Kind regards,
Wiola

Alpha channel problem with Pixel Bender blendShaders

I'm using Pixel Blender to try and create a blend shader for a Flex 4.0 app.
It looks like this:
<languageVersion : 1.0;>
kernel PixelReverse
<   namespace : "com.abc.def.filters";
    vendor : "EdAlive";
    version : 1;
>
    input image4 foreground;
    input image4 background;
    output pixel4 dst;
    void
    evaluatePixel()
        pixel4 fgPixel = sampleNearest(foreground, outCoord());
        pixel4 bgPixel = sampleNearest(background, outCoord());
        if((bgPixel.r == 0.0) && (bgPixel.g == 0.0) && (bgPixel.b == 0.0) && (bgPixel.a == 0.0)){
            bgPixel.r = bgPixel.g = bgPixel.b = 1.0;
        dst.r = 1.0 - abs(fgPixel.r - bgPixel.r);
        dst.g = 1.0 - abs(fgPixel.g - bgPixel.g);
        dst.b = 1.0 - abs(fgPixel.b - bgPixel.b);
        dst.a = fgPixel.a;
It looks correct in the Pixel Bender preview window.
When I use it in a Flex project with proper 32 bit png images, the filter seems to work correctly, except it sets any partial alpha value on the images to fully opaque (like a 1 bit alpha channel).
Because the image preview looks correct in Pixel Bender, I'm assuming it's a problem with the bitmap data that Flex is passing to the blend shader filter.
I tried changing the filter to simply output a copy of the foreground firstly, and the background second, to test.
When returning a copy of the foreground, the imags weren't visible on stage, either because the pixels were transparent or because it was really returning the background pixels, camouflaging the images.
When returning a copy of the background, the images were just black rectangles.
The images are being place on stage programmatically inside an mx Module, and having their depth property set.
They also have draggable behaviour, where the current drag object is layered above all else during the drag.
I'm actually using a subclass of mx.controls.Image, but am simply setting the source property with preloaded bitmap data, so I'm am fairly sure the subclass is not a factor.
I hope this is enough information for someone to be able to provide some help.
Thanks

Please make sure you have installed the latest graphics drivers, from http://www.nvidia.com/Download/index.aspx?lang=en-us, for your graphics card.

Problem with rendering RGB with alpha

I have AE 6.5. I suddenly began having .AVI's with alpha channel rendering with a flickering background with numerous flashing colors.
I did system restore, reinstalled 6.5 with no help.
No new programs, not hooked to internet, using 2 gigs RAM with AMD athalon FX 53,Nvidia GeForce FX 5500.
I tried several different projects which have previously worked and they do the same thing.
Rendering as Video for Windows with no compression. RGB + Alpha
Rendering with just RGB doesn't have the flickering, etc.
Preview set to "off" in comp window.
Any help would be greatly appreciated.
Thanks in advance.
John Rich

> I have AE 6.5. I suddenly began having .AVI's with alpha channel rendering with a flickering background with numerous flashing colors.
But when you composite these lcips I'll bet the alpha content is not really there.
We used to have this problem with the Media 100 hardware codec when rendering form After Effects. The alpha channel was full of the creepiest stuff, frame buffers motion blur and effects from other compsand it was really there. Playing the clip back in Media 100 or in QT showed the alpha channel's bizarre content.
However, if you turned off RGB and viewed alpha only, the stuff was gone, absolutely transparent. If you dropped the clip into a timeline, the alpha behaved normally.
We never did figure it out, just lived with it.
bogiesan

Problems with Apple ProRes 4444 and alpha channels in Motion 4 after upgrade to Snow Leopard. Has anyone seen this?

We've just now upgraded from Leopard to Snow Leopard and are having a problem with Apple ProRes 4444 and alpha channels in Motion 4. A clip with an alpha which keyed perfectly before the upgrade, now will not key. If I convert the clip to the Animation codec, it keys perfectly. If I export the Motion project as a ProRes 4444 self contained movie, it will key when brought into FCP 7 but if I import the project into FCP 7, it will show the key in the viewer but not the canvas. Has anyone seen this or have any suggestions on how to correct this? Is it a bug?
Thanks,

Motion 4.0.3
It just doesn't seem to recognize the alpha at all.

Intersecting Layers with alpha problem

Hi,
I have a problem with Motion when two layers intersect. On layer is totally opaque, and the second layer has transparent areas. The problem occurs in areas when the transparent areas intersect with opaque areas. In those regions I get a dark gray line appearing.
Check out this image and you will see what I mean.
http://jack.fxhome.com/MotionLine.jpg
Note: I get this unwanted line in the exported frame as well.
Why does motion do this?
Is there anyway around this?
Thanks

1) Try setting your Render Quality to Best (under the View pop-up menu)
2) Try changing the alpha interpretation of the layer with transparency - select it, press Shift-F, and try the different options in the Inspector's Media tab.

Freeze frame with Alpha problem.

I have exported a 3 second graphic with alpha channel from After Effects.
It keys perfectly until I drop on a freeze frame to lengthen it.
There is a luminance drop of about 5% between the AE clip and the freeze
of that clip. The freeze still maintains the alpha but you can see the change in luminance as soon as you apply the freeze to the clip.
I have trashed prefs already but to no avail.
Working in 8 bit uncompressed with a AJA Kona LHe card
Any ideas how to rectify this??

OK, here is the solution. Working in 8 bit, my video processing
was selected to be 'Render in 8 bit YUV' which seems sensible.
The problem with the freeze frames disappears when I select
'Render all YUV material in high precision YUV'
So now we know!! Thanks for the help and advice.

Problem with TGA+Alpha

I'm trying to export an image sequence (tga) with alpha channel but when it finishes the result is an image without alhpa channel. I don't see the option Milions of colors+ nowhere. How can I export TGA with alpha channel?

The "Export Still" is in CS4, though it has moved to AME (Adobe Media Encoder) now. Supposed to be back in Export within PrPro with the 4.1 update. It's a few more steps, than before, but still quite doable. You just need to do it from within AME. As you know, "Millions +" is what you want.
Good luck,
Hunt
{Edt] added link to CS4 on-line Help file.
Message was edited by: the_wine_snob

Sudden problem with importing tiff files with alpha channel (CS5)

OK this is driving me nuts. For years I have been importing image files that have an alpha channel into FCP as.tiff files. I use Photoshop files only when I want to use the layers as they are too cumbersome otherwise). I have recent upgraded Photoshop, etc. to CS5 and now FCP won't import them anymore. I get a message saying: "File error: 1 file(s) recognized, 0 access denied, 1 unknown"
I am not doing anything different and tiff files created in just the same way in an earlier version of Photoshop import and work just fine. Is this a CS5 bug? Does anyone know of a work around. I want to keep using tiff files as they seem to work best for me with alpha channel work (and I don't see why I need to reinvent the wheel).
Thanks
A

I've had a similar issue recently. Same TIFF files downloaded from the same server, different FCP project, new error. I either see"File error: 1 file(s) recognized, 0 access denied, 1 unknown" or I get the even stranger, "Unrecognized file type."
I can open them in PS and save them again as TIF, same results. I know these are not CMYK files but even if resave the TIF as RGB, I get the same results, they are not recognized by FCP.
But if I open them in PS and save them as PNG with alpha, they improt fine.
I have no idea what's going on.
bogiesan
Message was edited by: David Bogie Chq-1

CS4 export to.flv with Alpha dimensions problem?

Hi-
I am exporting an actress from a greenscreen shoot (original file 1920x1080p) That I want to put on a webpage.
She is keyed well and I have got to the export stage.
I have exported to flv. with alpha at various 16;9 dimensions (640x480etc) and that all works fine in Flash.
However, the actress is in the middle of the frame and the transparency is all around. Can I make the window size square? 360x360?
Therefor, cutting out some of the 'transparent' space either size and then ending up with a 360x360 file?
thanks
scott

Scott,
I do not have CS4, but believe that you can Crop your Export with FLV and the positioning should be centered. Remember, this is an assumption on my part.
Good luck,
Hunt

Problems with alpha

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