I have a plain rectangle with overall c09300c0 RGBA levels.I want to change the alpha channel value from c0 (193) to some other value, for the whole image at once. Or some other color channel.
How can I change the absolute value of a channel ? The color menu has only relative adjustments.
GIMP 2.8.4 Windows 7 64-bit
Using the native GIMP rotate function to rotate a rectangular image about its center (for instance) the corners of the image which are exposed by the rotation are set to RGB 0x000000 with an alpha value of 0.so that these areas are transparent.
If the same operation is performed as a GEGL operation the corners have RGB values of 0x000000 but alpha values of 255 - i.e. they are solid black.
Is there a setting to cause GEGL to use alpha values of 0 for these pixels? This also applies to GEGL operations such as shear.
I have an image which is simply a one color gradient, with transparency from nothing to something. I would like to be able to access the existing gradient on the image and change only the color. I have hunted high and low and cannot see how to do this.
(I am familiar with how to make a new gradient and how to change the colors in a saved gradient via the gradient dialogue. But for the life of me, I can't see how to access an existing gradient on an image and change only this one parameter.
I have a dark gray triangle alongside a pure white triangle in a square GIF image. I want to convert the white triangle to alpha and leave the dark gray triangle completely opaque. When I use Color --> Color to Alpha, however, I see the checkerboard pattern extend over the gray in addition to the white.
1. Does this mean that the gray is being made translucent?
2. If so, how do I set only one the white to alpha (at 0% opacity) and leave the gray at 100% opacity?
When I color a the background of a photo to alpha it works just fine, I save it and export.
But when I try to open that same photo anywhere else the background is white .
I had a .JPEG of a leaf photographed against a white background. When I went to turn that white background into a transparent alpha channel, it seemed to work okay....except for the fact that when I then went to select the new alpha channel via the Fuzzy Select Tool, it wasn't selecting all these newly transparent pixels.
View 6 Replies View RelatedI am using the latest version of GIMP on my windows 7 pc but color to alpha doesn't work. At my pc at work it works fine but i use windows xp there and i have ghostscript and python installed.
Or is it something completely different?
I don't understand how you can know which colors to use when applying "Alpha to Color".
Here are a few images I have and what I've done so far:
Here are my original images
I have been doing light box photography, but I want to get that pure white background as product images usually have.
My background is a light grey.. Using the wand tool, I was able to get close - but far from close enough.
[URL].....
What's the right method, to turn every thing around the dime, white?
Here it is before the wand,
[URL]......
I have a texture for an object that will be rendered. The RGB for the texture contains diffuse color, and the Alpha channel contains a special parameter for the shader. The value for the parameter is 0 for 99% of the pixels.
In my XCF I have diffuse color on one layer, and the special parameter on another layer (as a greyscale).
So I copy the diffuse layer and call the copy Final. Then I create a layer mask on the parameter layer using the greyscale value. I copy the layer mask from the param layer to the Final layer, and then I apply the layer mask to Final, which should simply write the mask to alpha.
I look at the channels window to be sure, and alpha is written correctly, BUT everywhere that alpha is black THE OTHER THREE CHANNELS ARE ALSO BLACK! I can't fix this! What do I do? I even tried exporting to see if it carries through to the output image, and it does!
What's more, I tried to trick it by putting a very low value (like 1/2) in the pixels that are supposed to be 0 in alpha, and then I get an even weirder effect, wherein most of the color is kept, but some pixels color information is trashed anyway. Is there an export mode which will tell GIMP not to trash the color information on fully transparent pixels? Or better yet, can I tell it that alpha is not transparency?
First time using GIMP. Following the directions here: [URL] ......
Using, "Color to Alpha," I tried to select the background of my .jpg image. The background is white, the picture (logo) portion is silver. Because of the closeness in color, when I select white, the software selects the entire image to become alpha (transparent).
When I select the color of the picture, silver, I am able to select just the logo portion. How can I take the logo portion, which is now converted to transparent, and give it a black or transparent background, and then return the logo back to its former color silver. The logo is perfect, it is just that I recently switched my site from a white header to a black header and the image has a white background, so that does not look good.
Is it possible to automate the following: I have a directory of about 50 jpg files. With each file I would like to:
- make the image square, by increasing the canvas size of the least dimension. ie if the width is less than the height, increase the width to the value of the height, or conversely if the height is less than the width
- add a transparency layer
- save to xcf
I'm working in Photoshop CS 5.5 on a Mac, and I want to apply a specific CMYK color to a selection in an image. I create the color with the values C=0, M=100, Y=100, K=10 and add it to my color swatches. Then I select the section of the image where I want to apply the new color and fill it with the paint bucket. The color fills the section just fine and life is good. But then when I roll over the section with the eyedropper to double-check the CMYK values in the Info window, it shows that they've inexplicably shifted to C=9, M=100, Y=100, K=1.
View 4 Replies View RelatedI'm on MacOS 10.9 (Mavericks). Using GIMP 2.8.8 (lisanet edition).
GIMP has been installed for many years on my computers, but first since it runs natively (without x11 or xQuartz) have I finally and entirely switched to GIMP for my raster graphic work.
I really like GIMP and I'm working on expanding my knowledge and respect this excellent programme very much. There are of course a couple of oddities when you are used to Photoshop (until 3 months ago). I'm getting there. Though one issue sticks out:
The use of the eyedropper tool for example in the Color to Alpha Dialogue. First of all I'm aware about the difference between the Color Picker (set colour from image pixels) in the toolbox and the eyedropper. I'm writing here about the latter. It simply doesn't work at all. When I open Color to Alpha... and then click on the color field (by default it's white #ffffff) the Color to Alpha Color Picker opens. When I select here the Eyedropper tool (Click the eyedropper, then select a color anywhere on your screen to select that color.) the following scenario happens: the cursor doesn't indicate a particular function (stays as standard pointer) - when clicking anywhere on my screen both dialogues, Color to Alpha and Color to Alpha Color Picker disappear (respectively they slip behind the main GIMP interface). I can't select any color! And when I manage to get the two dialogue windows back into focus, I have to wait a certain amount of time before any pressing of OK or Cancel shows any response.
Sometimes a random color gets selected but this is beyond my influence.
I guess it's a weak spot of the new native GIMP without any X11 wrapping. The windows managements has several weaknesses (i.e. GIMP/Hide). I also thought that it might be caused by the Single-Window Mode. But even without that the problem remains. All in all it's a very important function and without it the workflow involved gets very tiresome.
There seems to be tons of threads on how to make a transparent image, but I haven't been able to fine one to do one specific thing.
How do I set the alpha channel to be black? I want to have a black background on a png file, but I need the black to be transparent to things behind it on a webpage.
Then GIMP starts its foreground and background colors aren't black and white anymore.
I would like to know how to reset them back to default values (then program starts).
I've had this problem before, and it randomly popped up again today.
This time restarting Ai fixed the issue the first time. I just don't know if this was human-error/setting on my end, or a minor bug to report.
So I create a CMYK Ai doc. Create some black text and/or shapes. Then decide to change color to rich black by manually entering CMYK values (in this case, 60, 40, 40, 90), select ok. However, the colors revert back to original percentages (75, 68, 67, 90).
In past versions, it's happened once or twice, and restarting Ai didn't solve the first time.
why change the CMYK values of a color when converting to spot color in a color chart
xmp C 0 M 90 Y 100 K 0
to C0 M 87 Y 89 K 0
I opened a transparent PNG and exported the PNG to another file and unchecked 'save color values from transparent pixels' but about 20% of the color values in transparent pixels STILL remain in the picture when viewed in other programs that show those pixels!!! Gimp is NOT removing ALL color values in transparent pixels!
View 1 Replies View RelatedI am trying to color a sketch I made and have thus far (successfully??) created a white background, an ink layer and a color layer. They are in multiply mode. The file I am working with is not GIF or JPEG, it's XCF.
Color is set to 100%, mode is normal. And yes, the image mode IS set to RGB.
I had selected a small color palette and filled an ellipse shape with it. Fine so far. I wanted to make another ellipse within this one and make it a different color. This did not work. I don't know how many options I tried, incl. exiting the program and starting again, to no avail. Somehow (how this worked) ONE additional color worked (very similar to the first). But no black, for example, no green, nothing.
Yesterday I finished a picture (my first attempt using GIMP or any software, at least for art) and I was super happy with the result. It's not working.
I have an attribute blocks and this att block has two tag values , is there a simple code for to change 1st tag values automaticly according to 2nd values ?
for example :
1st tag (50x50) - 2nd tag ( 100 ) ==> 50x50-100
if i enter 201 valuse to 2nd tag then 1 st tag has to change as 100x100
if i enter 501 valuse to 2nd tag then 1 st tag has to change as 150x510
I attached a jpg file for explain much better
I've been having a hard time googling this question as it's hard to put in bite-size words. I'm looking for an easy way to take the alpha levels of each pixel on one layer, and then combine that with the color levels of each pixel on another layer. Let me give you an example. I want to take the alpha levels of image 1, replace the colors with the colors of image 2, and be left with image 3 (Only no background, because the alpha level should be zero!)
[URL]
I achieved the effect you see in image 3 by using the "difference" blending, and then inverting the image. Problem is, I've still got the gradient as a background which doesn't really work because that icon needs to sit on anything.
I have 2 x *.dds files. One is a default model texture (with no alpha channel) and the other is a lightmap, which has different visible graphics to that of the texture file. However, the alpha channel of the lightmap uses the texture file detail.
My question, as I need to recreate these from scratch, how do I import an existing image to another existing image and use it as a alpha channel. So far each time i have tried the original information is overwritten.
Here's a screengrab of what I'm trying to achieve. To recap, I'm trying to use image 1 as an alpha channel in image 2 (as shown)...
How I choose a color for any new objects I want to create. I've opened the toolbox with ctrl-b, which appears on the left side of the window. If I want to , for example, draw a red rectangle, I use the rectangular selection tool, then the bucket fill, and I don't see how to change the foreground color to red.
I've read elsewhere in the forum that there should be two rectangles somewhere on the screen that show foreground and background color, but I don't see them anywhere.
I have been having problems with images that I save appearing to be more saturated and have more contrast than the edit looks in the GIMP window. I tried playing around to figure out what it might be and found that when I open an image in GIMP, the image displayed in the program is less saturated and less contrasty than the original image without any changes made. When I save the unedited image, the new image looks like the old image, both more saturated and contrasty than the image displayed in the GIMP window. Because of the color change in the GIMP window, all of my edits are pointless because it is not showing me the correct outcome. My images are originally JPG format and I save/export in JPG format. Attached is a screencap. The original image/what the unedited saved image looks like is in the preview window on the right. The image on the left is the unedited image opened in the GIMP window.
View 1 Replies View RelatedI discovered GIMP 2 days ago and I am pretty excited to get started with it. The only problem is that I am a total newbie. I would really like to change the color of this image from black to blue but how to do so and the tutorials that I have found online don't really apply to what I am trying to accomplish.
View 3 Replies View RelatedI created a smudged brush stroke using several stokes with the same paint brush on one layer. I would like to change the color of the smudge but the bucket fill keeps filling each stroke. Is there a way to make all of those strokes one image now? So I can bucket fill with one click?
View 2 Replies View RelatedI can't change the default colors anymore. I mean the default foreground and background colors. I can change them to whatever color I need, but whenever I open GIMP they always start in some combination I had once a few weeks back.
I thought before that I was able to change it simply by going into the preferences and telling it to save the tool options are they are right now. But at some point my default colors got changed, and I can't change it back. Every time I open up gimp the colors are wrong. I can't find the correct option to change the default.
I made an image that has only two colors (not grayscale) only true black and true white. I want to know how to change these colors independently to whatever color. Basically what I did to this image was throw it in MS Paint and converted it to black and white.
How would I change these colors?
I want to select a specific color from within the image, and change all similar colors within that image to a different color. In other words, after using the Color Picker Tool to select a color from the image, I want to take the selected color (and everything in the image that is equal to or similar in color), and change them all to a different color.
I tried using the Path's Tool to create an outline in the image, and changing colors that way, but it changes all the other colors in the selection I don't want to change. I just want to change all colors in the image/selection that are equal to or similar to the selected color. How do I do this?
when I select>>copy from one image and then Paste As Layer into a new image, parts of the copied selection change color. It's usually not a vast difference in color, but a definite change.
In the screen shot you'll see that I copied the "Learn More" link from the top image and pasted it as a layer into the 3 following background images. In the first two it pasted exact (a brownish color), in the 3rd it pasted as a drab green color. Why?The 3 images being pasted to are all Indexed images with the same channels and same opacity.
The next example screen shot may identify my issue...but this one REALLY Does my head in I selected the bear by color, copied, and pasted as a layer into each one of the background images shown in the first example/screen shot.Notice in the first, how the bear is pasted as the off brown color of the Learn More link.The Second is pasted as the drab green color i'm trying to fix in the first example.And the Third is pasted as the Black color I want, but its on the same image as the drab green Learn More link I can't seem to fix...