GIMP :: Are There Different Formats Of Transparency In PNG Image

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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GIMP :: Several Formats Cannot Handle Layers Or Transparency

Jul 28, 2013

I am well aware that several formats cannot handle layers or transparencys. GIMP however seems hell bent to remind me of this EVERY SINGLE TIME I TRY TO SAVE A FILE (and even pops up a second "Oh, these are the current defaults, are they ok?" type dialog on some formats.)

Is there a switch hidden in GIMP that reads something like:

"When I click Save, assume I'm smarter than a plastic fork and know what I'm doing and just save the file in whatever default format has been requested like I told you to and do not attempt to engage me in playing 20 questions."

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Photoshop :: Preserving Transparency - Formats

Oct 17, 2005

I have a couple of logos that I need to "archive" and catalog in the following formats:

.tif
.eps

These logos were done in PSCS and are now in the .psd format - they contain a number of layers including a base transparent layer.

The question is can I preserve the transparency within the 2 above mentioned formats? If so how? I made a few attempts at it with each format but came up with a background color each time.

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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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GIMP :: Change Transparency For Portion Of Image?

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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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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GIMP :: Make Grayscale Image Into Alpha Transparency Channel

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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GIMP :: Creating 32bit PNG Image With Alpha-channel Transparency

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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GIMP :: Export File To Other Formats (PGN / JPEG)?

Nov 15, 2012

I just downloaded GIMP 2.8.2 for MAC and I'm trying to export a file to other formats (PGN, JPEG etc. The export image window greys out and nothing happens for many minutes.

I finally give up and I get this error: Saving '/Users/muladhara2004/Desktop/filename.png' failed: Procedure 'file-png-save-defaults' returned no return values

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GIMP :: JPG File - How Photo Will Fit In Various Printed Formats

Jul 7, 2013

I'm working with a jpg file. I'd like to be able to see how the photo will fit in various printed formats--8x10, 10x14, 12x18, for example, and what cropping, if any, I'd need to perform. How do I do that? And how do I see its current size, given either the horizontal or vertical dimension?

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GIMP :: Remove Save As File Formats From The List

Feb 16, 2011

Is there a way to remove some of the "save as" file formats from the list (when saving a file as...)? After numerous years in my field, there are a number of file formats I have - and probably never will - need to save my files as. If I could remove some of them, then it would speed up my workflow (so that I don't have to scroll down every time I save a file).

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Paint.NET :: PNG And JPEG Image Formats - Compatible?

Jun 22, 2012

A photo (a complex one with different layers) that was originally saved as a jpeg (100% quality) but after changing its size, saved as a png, is now used on another png photo.

When saving the end result as one photo with the png format as well, is that going to cause problems^^ with regards to print quality or not?

As it basically means a kind of mix and matching of jpeg and png formats.

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GIMP :: Transparency Does Not Appear?

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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GIMP :: How To Recreate Transparency

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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GIMP :: Transparency From Background

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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GIMP :: PNG Images And Transparency

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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GIMP :: Setting Transparency In PNG

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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GIMP :: Transparency From Selection

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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GIMP :: Black Alpha (RGB+A) Transparency?

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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GIMP :: Not Erase Something Off The Transparency Layer

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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GIMP :: How To Create Variable Transparency

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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GIMP :: Transparency For A Sprite Sheet

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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GIMP :: Set Transparency On Couple Of Layers?

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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GIMP :: Flatten Without Losing Transparency

Nov 5, 2012

Is there an easy way to flatten without losing transparency?

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GIMP :: 2.8 - Can't Draw Area Of Transparency

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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GIMP :: Layer Transparency Does Not Work

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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GIMP :: How To Reduce All The Transparency Of Room

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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GIMP :: Remove Transparency In Animated GIF?

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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GIMP :: Unable To Save Transparency?

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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GIMP :: Degree Of Transparency In Copy?

May 20, 2012

I have made background png pictures and I have copied sections of such pictures onto other pictures, but the copy is never translucent or partly transparency and I have not found a way to do that. I can choose a degree of opacity when I simply fill an area with a solid color, but I have not found that option in the copy command. Is there such a capability in Gimp?

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GIMP :: Preparing Images For The Web / Transparency?

Mar 11, 2012

I need to put images on websites such as headers, buttons, icons, just text and so forth.

I have saved my work first as .xcf for later editing. Then I save my work as .png that I have created with a transparent background. However, when I go to put them on the websites I am building there is Always a white background. ??

Even when I upload them to Photobucket there is a white background. But when I make .png images in Inkscape they load fine to Photobucket with no white background but again, when I try to put the Inkscape .png images on my websites they too have white backgrounds.

Also, when I save files with a transparent background as .gif and upload them to Photobucket the transparent background is there but the images look just awful. They are no longer smooth around the edges & look like the pixels are sticking out all around the images.

Also, when I save files as .gif and upload them to my websites they too have a white background. ??

I've been using Dropbox to send images to my biz partner and both the .png and the .gif are showing up with white backgrounds in Dropbox as well.

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