GIMP :: Transparency Coloured When Exporting Image?
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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Nov 25, 2012
Basically, I am trying to use an alpha layer/channel to export a picture that is transparent except for a grass clump that is colored green over the alpha layer. So the picture looks like a solid green rectangle, but is actually a green blade of grass.
Problem is, I cannot get the alpha layer to work. I can't follow the tutorial as it is in photoshop, and random videos on-line haven't worked.
(Here is the tutorial: [URL]...... from 08:40 - 09:30)
(I have also attached my practice file as a TGA)
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Sep 7, 2008
I have a red block and on that block I have some lines which I have in white but they need to be transparent as this design is going to be printed on tshirts of different colours and the colour of the tshirt must show through the transparent lines. Im not sure how to make them transparent though, when I convert the white to tranparent you see only the red.
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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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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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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 21, 2012
My GIMP 2.8. closes down immediately after exporting an image. When I overwrite it, it doesn't happen. How can I prevent GIMP from closing down after exporting images?
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Aug 5, 2013
When I open my image, it comes up all coloured. I can get rid of it by changing to 32 bit, but then when I revert back to 8 bit to save, the HDR box pops up and it changes the look of the image automatically on me.
I am shooting with a Canon 5D Mark II, in RAW (SRAWI).
The guy on telephone support got rid of it temporarily, but next time I opened the program, everything was messed up again. He claims he just reset the setting to default, but I made NO changes to the settings following his intervention.
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Jun 4, 2012
effective way of removing a selected coloured area from an image (a jpeg in this instance) without affecting other parts of the image. I've added a sample to illustrate what I mean.
I,ve tried the select color/ erase tool but find that it select the white from all parts of the picture, even from other colours.The picture is too complex for the freehand mask tool and time consuming.
Is there another way, or even a plug in that could vouch for?
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Feb 1, 2011
Import a photo image which is, for example, 100px high by 500px long. Now apply a simple fade transparency from the left edge to 100% transparent 100px in from the left edge (i.e. 400px of the image's length is now 'invisible').
Export this as a png and then import this png. It will still be 100 x 500 - can you tell Xara export the image truncated down just the 'visible' portion (i.e. 100 x 100)?
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Nov 25, 2013
I have always flattened everything out of CDR whenever there is any transparencies involved, this works fine, you just have to deal with large bitmaps. Now in recent discussions some respected contributors have touted using the X3 pdf setting with Compatibility set to Ver9. That works, transparencies print without the yellow box ....fine... but.
I design with CMYK colours ( I know.. BIG discussion that has been addressed many times) and use RGB images (because they are usually client supplied or our Stock site only supplies RGB).
My problem is in my PDF settings I have everything set to export as Native which works well on the Roland using Max Impact and even if I set compatibility to PDF Ver 9 transparency will still have the yellow box.
To get transparencies to work without flattening, everything has to be exported as CMYK and as you know RGB blue goes purple when you do this and the RGB images just don't look as good.Is there a way to get transparency to work in a PDF with exporting everything as Native and using PDF Ver 9?
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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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Aug 23, 2011
I'm having real troubles exporting a button which has drop shadow applied to it. The vector shape has Gradient Overlay, Inner Shadow and Drop Shadow applied to it as layer effects.
When I export it with transparency, PNG-24 and then open and place it over the same background, the drop shadow looks quite different.
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Dec 31, 2012
I'm trying to batch save a series of PNG animation files using the File => Scripts => Export Layers to Files action in Photoshop CS5. Each layer has a transparency and a shadow that have been converted from layer effects and "baked" into the image. I tried the batch save but it turned all of the transparencies solid with white backgrounds. Also the image size was not cropped to the dimensions of the object on each layer.
Lastly, is there a way to edit the numbering for each file? When the images were exported it created a lengthy set of numbers after each file name when all I need is a 00 padding.
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Jun 21, 2008
I would like to know how to change the colour of a single layered, single coloured gradient (foreground to transparent) image. There is nothing more to it than that other than I don't want to use the hue/saturation adjustment as it's hard to get a specific colour.
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Mar 26, 2013
It makes very serios color shift. how can I prevent this.
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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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