GIMP :: Horizon Straightening On Image - How Rotation Tool Work
Apr 6, 2011
I need to do a small bit of horizon straightening on an image which I have.
Using the rotation tool is fair enough.
Under clipping I select crop to result.
In the rotation dialog i enter the angle ( -.7 )
When I click rotate, it goes through the motions of a status bar advancing (green bar), but when it is finished doing its thing the image vanishes entirely, and i'm left with what looks like a transparent background.
If in clipping, I select 'Adjust', it rotates fine but I have to crop the result manually to have the image 'square' with no transparent angled edges.
How the rotation tool works? I'm using Gimp 2.6.4 on Windows Vista.
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Aug 27, 2012
I would like to know if it is possible to do this in gimp:
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or this:
clone and rotate the cloned source:
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if its possible, how do I do it?
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Feb 19, 2013
I'm putting together a series of images, and I want the horizon line to be a constant from image to image, though they were not that way in the original files. I'm assuming that I should go with the picture that has the smallest distance from the bottom of the picture and then crop the others so the distance appears to be the same in them as well. But is there a way to make that a simple process?
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Apr 15, 2011
I have an image with the sea and a horizon, I want to make the horizon straight and wonder if there is any useful tool in Gimp to edit the image? I have done it in Photoshop before and remember that there was several tools to pull and change the image. Perhaps Gimp doesn't have tools like that? As it is now, the the horizon is a little bit curved and look strange.
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May 16, 2013
After using the straighten tool, I end up with the picture within its own borders the way I want, but it appears on top of another piece of white paper, and skewed on that white paper…how do I get just the straightened picture without it appeared on top of the “white paper”? I am using Photoshop elements 10 on an i Mac desktop.
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Jul 13, 2012
I would like to know which tools to improve the border of a small image after rotation. Something like sharpening.
The picture is around 25px wide. When magnified, it shows like this :
The original image pure red and pure white.
The white line, that is a ~1 px from the border is at some points too much polluted by the red color. And the red color is locally too much polluted by the white color.
There is also some aliasing that I want to remove.
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Jun 27, 2009
I just got elements 7. I tried to straighten a photo, but I do not know how to save the change.
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May 19, 2012
The "Done" button that appears at the bottom when using the Crop & Straightening tool and others has suddenly disappeared. I thought it was a full screen issue but cycling through F doesn't restore it.
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Nov 2, 2013
I have several photographs of amateur paintings that were taken with some kind cheap camera that distorts the edges, making them curved.
I want to straighten those edges and then crop the photo so it'll be just the painting.
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Jan 25, 2007
I just downloaded the trial version of CS2. I have a lot of images on my computer that I scanned into my computer. Naturally, these images were not centered when I used my scanner.
I was just wondering if Photoshop has any features that would allow me to slightly rotate my image to make it completely straight?
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Jan 15, 2009
I have a requirement to take a relatively simple technical line drawing (think circuit diagrams etc) that have been hand drawn and then somehow convert them into a nice sharp and neat diagram that looks like it had been done in illustrator or Visio.
I know that image editing tools such as Illustrator allow you to "vectorize" a bitmap image but the thing I don't about is whether any of the applications can automatically straighten and correct lines and give me a "nicer" picture as a result?
Does anyone know if this sort of thing is even possible?
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Feb 13, 2012
I am making a poster but not very experienced with GIMP.I want it to look like this:URL...The perspective tool doesn't work because it makes it unreadable as the text I want to use is quite long - 3 words long.
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Jul 13, 2013
I'm looking at tutorials on how to add strokes to text (I downloaded it today) and they say to use the color select tool. In their demonstration, when they select text, it has the normal dotted lines around it. For me, when I click it just has a thick border around it and it tells me to move my mouse to change the threshold. It won't select the text, just change the threshold when moving my mouse from left to right.
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Sep 3, 2011
That option seems to cause the corners to snap to some other points which aren't the grid, and making vertical lines impossible.
Is there a way to make it use the grid just like how the rectangle select tool does?
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Nov 9, 2013
I'm running Photoshop CS3. I recently got a Wacom Cintiq 22HD Touch with an Art Pen. The Art Pen supposed to give me that 6th rotation(barrel rotation). But when I tried it, it doesn't rotate any of my custom brushes.
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Jul 30, 2013
I use a copystand regularly, due to the design of the stand, the camera ends up taking photos of the scene upside down. In lighroom the only way I can find to rotate images is in the library module using Ctrl-] (twice as I need to rotate 180) or using the little arrows under the image. When doing copystand work, requiring instant review, and taking many hundred photos in a day, this isn't really workable.
I tether my camera for this work, and due to using an unsupported camera (sony a850) I use the hotfolder import method. This gives me the option to apply a "develope setting" profile and a "metadata" profile, but the single thing I can't work out how to change automatically on an image is the one that I really need to change: the rotation option.
I have also found inconvenience in the past of having to switch back from the develop module to the library module to find that one misplaced editing option. I like that this setting is accessible from the library module, but I'd like to see it also being accessible as part of the develop module's crop functionality, both from the UI, and from the metadata sync/save systems.
Would this make a reasonable feature request?
I currently use Lightroom 4.4, but will be upgrading to Lightroom 5 shortly, It doesn't look like it's been sorted out there either. I'm also on windows 7, but i'd be surprised if this was different on mac.
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May 21, 2012
I am very familiar on how to use the scissors tool, but I want to know once I get to the end, is there a way to go to another section of the image to cut out what I want to get rid of?
Example, a picture of someone with their hands on their hips - I want to cut out the space in between the hips and arms and then everything else. How do I accomplish that?
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Oct 4, 2012
I am using Linux Mint 13 and gimp 2.8.2 and I keep getting an error message "set a source image first" when trying to heal a dust spot. I choose the tool, I select the area I want to use to replace the dust spot with ctrl click but when I release the ctrl button and click the area to fix I get the message "set a xource image first". Strangely after I release the ctrl a animated radar appears briefly on the screen. Do not ever recall seeing that in earlier versions of gimp. At any rate I can not do a simple heal.
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Mar 30, 2012
I am new to Photoshop and I want to learn how to realy use it to its full capacity, so I purchased a book titled Adobe Photoshop CS5 one-onone by Deke McClelland. I was going through the chapters and I came upon the use of the Rotation Tool. While following along I selected the rotation tool to rotate an image, but with teh tool selected all I got was the little circle with the line through it indicating it was not active.what may be causing this?
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Mar 5, 2012
Using Photoshop CS5 Extended, I have an image open with the 3D Workspace.
When I click on the 3D rotation tool the red horizontal / green vertical tool does not appear.
Please see the image below, I believe this is the tool that should appear but doesn't...
Is this a setting ? Where am I going wrong ?
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Oct 9, 2012
I just downloaded Maya 2012. The rotation tool only rotates an object on the y axis. For some reason, when I grab the X or Z axis, it will still only rotate on the Y axis. How do I fix this?
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Nov 27, 2012
I'm brand new to GIMP, I just downloaded it to get into some simple pixel art.
I was going fine, but I've run into a problem. I'm trying to select a portion of my image using the rectangle tool, and then move it to a different location using the move tool. However, when clicking and dragging the move tool it shifts the entire image, not just the portion I have selected. I read in the FAQ that you need to press "Enter" to finalise the selection before you move it, but even doing that doesn't work.
This was working fine for me earlier, I'm not sure what I've done to break it. I've tried resetting my tool preferences back to defaults but that has not worked.
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Oct 29, 2011
I have an image, I was manipulating it, smudging etc. Then I selected the lasso to crop out the image. Then I wanted to go back and blur something else. But it wont let me. The lasso'd section of the image stays flashing, even when I double click it to stop it. I am stumped as to how to exit this function. I don't know why it doesn't just switch to blur when I press the BLUR button.
How can I get this to stop? It keeps interrupting my edits and I now have to do it all over again in a separate window as no matter how many times I undo the lasso section will not stop flashing!
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Oct 20, 2013
I've been wondering how do you get the rectangle select tool to move the image, like in mspaint whenever I use it, it just moves the rectangle square and not the selected part of the image.
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Feb 20, 2012
I've used the clone tool since Photoshop 4, and it has greatly improved. The ability to preview the effect before clicking, the addition of patch and bandied tools, etc are great. The next version is supposed to have content aware moves.
However a basic feature that is lacking is the ability to rotate the clone selection. Cloning out lines crossing edges is hard. Cloning non edged areas is relatively easy, but edges in real life often follow a curve. Now that the clone tool has a preview, it would be good if keystrokes could rotate the clone clockwise or counterclockwise to better clone along curved edges. There are workarounds with ctrl-j selections, but they are cumbersome. I'm not saying the content aware features will not be useful, but more mundane improvements are lacking.
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Apr 19, 2012
When I copy a selection from one image to another, I can't select the feather tool to blend it in the new image (it's greyed out). I have to first anchor the layer, then use the paths tool to re-select the pasted portion again, then feather. Is there another way?
Update: Looks like I can feather before copying/pasting the selection.
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Dec 8, 2012
IProblem 1: Tool Palettes on top of image.
I'm using a 15" thinkpad laptop, with I think 1024 x whatever highest resolution. When I use Gimp, my screen real estate is being eaten up by the tool palettes more so than the image I'm trying to work on. I like the tool palettes - I'd like them to stay open - BUT what I'd really like is for the image to lay over top of the palettes, rather than the palettes lying over top of my image.
Problem 2: Zooming and scrolling in the image.
I'm not too sure what was different about photoshop in this regard, but I'm having a bear of a time getting my images to zoom and scroll in the manner I was used to in photoshop. What can I change in the Gimp settings to make it behave more like photoshop in that regard? I found one setting to increase window size as the image zooms, but that was worse.
I like a lot of the aspects of Gimp, but these two things are preventing me from getting to use it very much presently.
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Aug 24, 2013
The Scale tool from the toolbox behaves differently from Image>Scale Image. What's the difference? Are there circumstances when I want one and not the other? I'm using 2.8.6, Windows 7.
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Jun 25, 2011
When I open a rectangular photographic image (JPG) and rotate it 90 degrees, the canvas remains the same and the ends of the photo are cropped. I there a way to rotate the whole shebang so this cropping doesn't happen?
Telling the canvas to resize to the picture doesn't seem to work for me.
Gimp 2.6.11 on Linux
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Nov 16, 2012
I have drawn a 9" circle on a 11" x 11" canvas. I would like to create 45 "tic marks" around the circle at 8 degree intervals. How to use rotation to accomplish this goal?
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Nov 3, 2011
I rotated some pixels, but afterwards when I do something else, the pixels become unrotated. I tried saving the image, but that reverts the rotation, too. Why won't the pixels stay put?
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