GIMP :: Image Loses Transparency
Nov 22, 2011
*) Open the image "Ok.png" - you'll see there's a small green triangle on the right.
*) Mark and delete a bit of the triangle.
*) Save the image (I checked the 3rd (gamma), the 5th (resolution) and the 6th (time) checkbox).
When I now open the saved image in a different viewer (I use the picasa viewer because this viewer shows the transparent areas nicely), the image is still transparent.
*) Delete the rest of the small green triangle on the right.
*) Save the image.
When you now open it in a different viewer, then suddenly the background isn't transparent anymore. (It's then like the 2nd attached pic - Fail.png)
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Jun 12, 2013
I placed and traced a PS doc (with transparent background) in AI..... then I saved it as an AI file, opened it in Photoshop, and the background was white. Result was the same whether I saved it flattened or with layers as objects. How do I do this and maintain transparency? It's probably something obvious....
(I'm using CS 5 on a turn of the century Mac.)
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Mar 5, 2011
Are there different formats of transparency in a PNG image?
I've made a PNG image with transparency that looks fine (I see gray checkerboard through the image) when I close it and reopen it in GIMP. But in the Windows 7 picture viewer, all of the transparency looks opaque white. It is also opaque white when I load it into my Android app for use in OpenGL.
I've made PNG images with Inkscape, and they do not have this problem. The transparency looks correct in the Windows picture viewer, and in my Android app.
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Jun 10, 2013
I have a large background image and I want to change (lower) the transparency of the header portion. I can select the portion with the rectangle, but after that I'm stuck. I tried changing opacity but it affected the entire image. I tried selecting Layer -> transparency -> add alpha channel, but that didn't do anything that I could see. How do I make the rectangle portion that I selected somewhat blurry?
Note: I did simply blur out the header portion of my image as one solution. But is it possible to add a layer over just the header part of the image and make that layer semi transparent?
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Jul 11, 2011
You probably think "but come on, there are many places where this is explained...". And so it is, but it doesn't work anyways.
I have an image with transparent areas. I have an alpha channel. When I save the file, I do use the "Save colour values from transparent pixels" for png and for gif I check "Interlace" option.
I have done the rigth click -> colour to alpha. What happens when I do this is that some white parts become black.
Things I have noted, perhaps that doesn't matter , is that when checking the alpha channel in the layer tool, it is white and not transparent.
The image is attached.
One last thing, I did copy the image from ConeptDraw (visio-alike application on Mac) before trying to save it with transparency.
This is driving me nuts, I have struggled for hours. I have done it before (way back), but something is different now.
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Oct 21, 2012
Is there any way I can directly make a grayscale image into an alpha transparency channel?
I mean, NOT involving selection? Because selection by color to layer mask,is really difficult what I need to do the selection threshold.
Why is it easy to turn an alpha channel into a grayscale image but not the reverse?
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Dec 15, 2011
I already have an image file in png format..which I want to use as an application launcher icon for my android application.
The android specifies image with following properties for the launcher icon(Will need 4 different image to support different screen size in mobile devices)
Launcher icons should be 32-bit PNGs with an alpha channel for transparency. The finished launcher icon dimensions corresponding to a given generalized
Screen density are shown in the table below.
1. 36 * 36 px
2. 48 * 48 px
3. 72 * 72 px
4. 96 * 96 px
I would like to create 4 png files(with specifications mentioned above) from the already existing image file. How do I do that in GIMP.
I am completely novice to image editing(Never touched any image editing software before) and not sure how to achieve this in GIMP.
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Nov 26, 2011
I just noticed a serious UI issue. Say I'm zoomed in and am creating acomplex freehand selection. I'm now selecting stuff at the very top ofthe canvas, and I happen to miss a bit and touch the 'ruler'. Suddenly,GIMP switches to the move tool and I've lost the whole selection! Does this behaviour can be turned off?
(I know I can turn off the rulers, but it's annoying having to turn themoff and on all the time since they are sometimes useful.)
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Apr 25, 2013
The quality is gorgeous at first, but when I export the image, it loses all it's quality.
Image here
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Jan 16, 2012
I'm zoomed in and am creating acomplex freehand selection. I'm now selecting stuff at the very top ofthe canvas, and I happen to miss a bit and touch the 'ruler'. Suddenly,GIMP switches to the move tool and I've lost the whole selection! How this behaviour can be turned off?
(I know I can turn off the rulers, but it's annoying having to turn themoff and on all the time since they are sometimes useful.)
Is there a way to make rulers be off by default when I start Gimp? Iknow it's just a matter of clicking ctrl+shift+r, but that's easy to saywhen you've just lost a huge, painstakingly made selection …
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Apr 18, 2012
I'm using a Windows 7 icore7 machine. The file I'm working on is composed of six layers: 1) a masked Levels layer; 2) a masked Noise layer; 3) a masked Hipass layer; 4) a convert to BW layer; 5) a copy of the background layer; 6) the background layer. All the eyes on the layers are ON.
When I Flatten Image the contrasty look I've created with the Levels adjustment layer AND with the Hipass layer disappears and the flattened image no longer exhibits those qualities - in other words it reverts back to being soft, low contrast.
All the eyes are ON.
I tried various combinations of MERGE VISIBLE and the same thing happens.I swapped Hipass for Unsharp Mask and for Smart Sharpen and even more weirdness happens - These filters have no effect at all.
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Oct 30, 2007
I have saved several hundred images from a jpg format to jpg for web, (optimized), but it loses it brilliancy to colors. I am using the Sharpen filter and Shadow/Highlight to edit the image. But it loses that little bit of edge once it goes to save for web.
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Aug 19, 2013
I have a large image at 72 ppi. When I reduce the size (pixel count) leaving the resolution at 72 ppi, the smaller image loses sharpness. Why is this happening?
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Jan 3, 2014
I have a background that has 8.5" x 11" external dimensions. In the project bin, I'm also showing a layer (with transparent edges) that I've resized to 1" x 1.5". When I double-click the background to put it on the screen, and then drag the layer onto the screen, why doesn't it look like a small picture on top of a big one? Instead, it's huge, and I have to drag it down to size with the move tool!
And now, the entire story:
Running PSE9 under Mac OS X 10.6.8 Snow Leopard.
My project is a montage of stamp-sized images on a letter-size background, as in the attached -- commemorating the woman in the centerpiece. I've stumbled though this kind of effort before with great success. This time the small photos are coming out blurry, and it's because this time I've done one thing differently.
In prior efforts, I recall somehow reducing the outside dimensions of an open file to about 2" x 3" before editing and finally adding it as a layer to the big background (using Move Tool to size it to fit), although during editing I was working with a reasonably-sized image and not a stamp (probably using command +). The images in the final version were all sharp. On this effort, however, cannot remember how to do it the same way, and I ended up working with the original photo, and then when I added it as a layer, I reduced it using the move tool -- very clumsy in view of the fact that the edited layer's image seemed to be larger than the canvas I was building, and the final images were blurry.
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Jan 25, 2014
Sometimes I make a fresh transparency blank of gimp. Then I import a jpg. I expect the transparency to appear as I erase. Sometimes it erases and there is white; sometimes I erase and it's transparent. ? Isn't it supposed to be transparent?
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Oct 4, 2012
The edges of this fabric are semi transparent. The grey colour to the area where the arrow points is caused by the photo's original background. Now I'm wondering is it possible to recreate the transparency so that the colours from a new background will show through. I've tried colour to alpha but that makes most of the image transparent.
The rest of the image is mostly black and greys with a splash of red. I would post the entire image but it's copyrighted - DA stock model - so I don't want to break the rules.
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Mar 26, 2012
How is it possible, to take the brightness of every pixel from the background, and transfer that to the upper layers transparency. (The upper layer is for example all blue). As I said before, I know that this works. I tried everything out and asked Google a lot of times, but I just can´t figure it out.
What I can remember doing there was just take the blue layer and transfer it to another picture. I was wondering because i didn´t do anything special.
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Apr 8, 2013
My Gimp version……2.6.8.
Until recently Gimp has either supported transparency of .png image files or automatically added an alpha channel to the image. This I don't know. I do a lot of rendering and have always been able to take a .png or convert any image type to a .png, create a path, and delete everything outside of the path and end up with a transparent background.
But something has changed where I must now manually add an alpha channel to a .png image in order to end up with a “transparent background”. what changed in Gimp that I can no longer just erase or delete a selected area of a png resulting in a transparent area?
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Jun 1, 2012
[URL]
In each program I have used from Corel Photo-Paint 11, Paint Shop Pro 5 and 7, to Gimp 2.6.11 the end result is exactly the same.
I select the background Invert the selection to pull it out of the original Paste the remaining image with transparent background or make an alpha channel The background needing to be transparent stays transparent.
The moment I save the image as a PNG, close the image, reopen it, check if the Mask/ Alpha channel data remains in tact, and it does, the transparency is completely removed and the background turns to white. This happens on every one of the programs and I am just at my wits end.
There must be something, an order of operations, a color scheme, a presetup step that -everyone- knows but me, that is preventing this from having a transparent background.
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Jun 25, 2012
I've to select an area ant turn the background transparent. Previously this was simple: select foreground, invert so background selected, toggle the transparency to 0% and hey presto, transparent background. Now when I do that it goes white.
I have tried using transparency - add alpha channel, and nothing happens: the menu stays there. Is that a glitch in y version of Gimp? and how can I now isolate the background and turn int transparent?
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Dec 7, 2011
making a alpha channel transparency; Funny thing is. I made it work once a few days ago. I went to bed and forgot to write down how i did it (Tried everything, almost)
In the link right here [URL] n i have 4 files; Q3a_arrow_gimp_ver4.tga (TGA that works as i want it, you'll notice ALL the alpha channels have a black layer channel in the channels tab, how do i recreate that?) Q3a_arrow_methodtry.tga (tried to recreate with THIS tutorial [URL] with no success P.S. i tried loooads of tutorials but this recreation seems rather close to the working .TGA i need) Q3a_arrow.ai (sourcematerial all vector from Adobe Illustrator) Q3a_arrow.png (picture with transparency intact if needed for comparison)
So; Now... What i did to make the working picture was making a .PNG - drag it into gimp.. I recall doing some Alpha and or masking or selection thing with it, then rendered it for .TGA since Illustrator does not support the kind of .TGA i needed. Worked flawlessly in the engine where i use a function called alphafunc GE128 (blend with black as invisible layer and white as solid)
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Jan 28, 2014
I loaded one PNG pic.
I added an alpha channel to make it a transparency.
I used the select by color tool.
I clicked white & removed.
I saved. I switched to eraser - but it is acting like I'm trying to erase something off the transparency layer and won't erase anything.
I have the correct layer selected in the layers window.
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Sep 4, 2013
I'm sure 'variable transparency' is not the right way of putting this.
I have an image which has some text in white. However because of the aliasing the text is not 100% white against the background (black). Rather; the edges are shades of white.
I want to convert the image so that the text is transparent. If the text was 100% white it would be simple. Colors.. Colors To Alpha. However that doesn't work as it doesn't deal with the shades of white around the edges of the text.
I want the shades of white to be transparent with the same degree of opacity as they white. So the white in the image is 100% transparent and a pixel which is say light grey to be 90% transparent. (The end image is going to be used as a webkit mask; showing the background behind the masked element).
I don't know where to start with this. I know PNGs support 8 bit transparency so it should in theory be possible.
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Dec 21, 2013
I have a PNG of sprites similar to this:
[URL].........
I want to change the background color to a transparent one. I've tried using Color to Alpha but that makes the sprites themselves partially transparent which is not what I want. My second attempt was to use the fuzzy select tool to select all of the white bits and remove them. This doesn't really work either because on a non white background each of the sprites has a few whitish pixels around it's edge. So what I really want is a combination of the two, i.e. all of the white pixels are made completely transparent, and the whitish pixels on the edge of each sprite are made partially transparent, but the sprites themselves remain opaque.
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May 7, 2012
I need to set transparency on a couple of layers, how do I do that in GIMP 2.8?
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Nov 5, 2012
Is there an easy way to flatten without losing transparency?
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Mar 16, 2013
Take any image. Enlarge the canvas to create an area of transparency. Find out you can't draw on it. Click and unclick the buttons by "Lock:" in the layers bar. Get really really frustrated.
What do I do to fix this (before I give up and uninstall Gimp)?
(to pre-empt the innevitable question - I can't draw on an area of transparency. Even if I copy a section of picture and paste into a new layer and move that to cover the transparent area, it isn't visible. Its like there's an area of completely opaque transparency covering everything else.)
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Aug 15, 2012
I find myself creating new layers and making them slightly transparent all the time. But when I do this using Gimp it does not work right? This is what I am doing:
Add new layer
use transparency/opaque slider to change the setting
what happens is that the new layer stays solid until it goes below 50% on the slider and then it disappears, above 50% and it is back. It is like the 50% mark is an on/off switch for the layer.
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Sep 25, 2012
I have some objects in PNG which I want to keep the same size but I want to reduce all the transparency room so when I put them on a page the box is not so big.
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Nov 11, 2012
I have an animated gif in which I put in a transparent background on all the frames a long time ago. But the edges of the images were all anti-aliased, so the edges look pretty bad on a much different background. Now I want to change it back to the black background on each frame, and the origial file is lost.
I went through each frame and used Select by color to select the transparency, then Edit to fill the selection with black. However, most frames have a layer boundary that is smaller than the image size because the animation does not always fill the screen. The background on each layer/frame is still transparent. When I saved that work, only the current layer boundary in each frame shows - the rest is transparent. So instead of an unchanging size image with a black background, I get a variable sized one.
So I thought I would remove the alpha channel from each frame. That looks ok while the whole image is open in GIMP, but when I go to save it, GIMP puts the alpha channels back in each frame! I don't know why it's doing that. But I did notice that when I preview the animation with the alpha channels removed, artifacts are visible when the next frame is smaller than the one before it, so I don't know that it's what I want, anyway.
Can I change the alpha channel from completely transparent to completely black? how to make the blackgrounds transparent, but I can't find anything about undoing it.
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Feb 21, 2013
It seems I'm unable to save a png (or gif) with transparency.
I want to convert a white background to a transparent background so I perform the steps below but unfortunately the exported image still has a white backgroud. I've tried exporting to gif but that doesn't make a difference. Here are the steps:
1. I first add Alpha Channel
2. Select color to alpha and select white (this gets rid of the white background but now my image looks ugly as all the white is gone and it's partially transparent so I perform the next steps to add the white back to the image)
3. Duplicate the layer
4. On the second layer I add a layer mask and initialize it to white
5. On the second layer I use the bucket to color it all white
6. With the second layer selected I meticulously erase the white background knowing that if I accidently erase too much it wont be a big deal - it will only begin to expose the ugly image that.
7. I'm happy with the image so I merge the layers
8. Export to png and I make certain the "Save color values from transparent pixels" is unchecked
why the image I see in GIMP is losing the transparency when I export?
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