GIMP :: Threshold Function Parameters That Vary By Position?
Apr 1, 2012
I would like to obtain a black and white image of a photograph of a book page.
My attempt to do this is by running the threshold function over theentire image. This appears to give the desired result, but onlylocally. It appears that the optimum parameters of the thresholdfunction vary by position (i.e., according to some scalar field), withone extreme in the center of the glare and then radiating outward. Sojust running the threshold function over the entire image withconstant parameters always gives sub-optimum contrast for 75% of theimage. Will I have to find a way to run the threshold function withnon-constant parameters, or is there some other tool to do the job?
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Sep 4, 2012
I want to use the Threshold Alpha command on a Layer of Solid Noise, but nothing happens. If I set the threshold to 255 everything goes transparent, anything below that the clouds are supremely unimpressed. It's an RGB image, has an alpha channel, no Alpha channel lock, the Threshold tool works fine. I also tried creating another test picture with several gradient in greys and colors, and they are equally unaffected by Threshold Alpha.
I'm using GIMP 2.6.11 on WinXP SP3.
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Jan 21, 2014
i tried restarting gimp but it did not fix my problem. All of a sudden, out of nowhere, my fuzzy select tool selects WAY too much even at a threshold of 1. at 2 it just selects the whole picture.Re-installing did not fix.
i am creating black/white based icons. So it is a 48x48 image. i am mainly trying to fuzzy select black, white, and transparent selections. As you can guess, it has become impossible now and i don't know what i did.
EDIT: Okay so it actually isn't selecting "too much" per-say. i willt ry and explain the best i can here:
Black and white image with the exception of some shades inbetween.Select fuzzy select and put threshhold at 1. Click. Selects all the white (i actually think it misses some). i hit SHIFT and click on a pixel that is slightly not white. VERY SLIGHTLY. In fact, it may actually be white. It fuzzy selects EVERYTHING.
Another example on an image that is Black and Transparent (with shades inbetween) Slect black on threshold 1. It selects All the black AND all the shades inbetween. Eveything except flat out transparent. i hit CTRL and select a shad einbetween and it deselects everything.
EDIT 2: Doesnt matter the threshold apparently. It will do this on any.
EDIT 3: The solution, after all, was so save these problematic images as JPG and then open them as the JPG.
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May 3, 2013
I scanned some images to Tiff format and when I bring them into Gimp I can't seem to get the threshold effect to work. The other color effects work but not threshhold. I check with other Tiff images I have and they work but not for this new set (done on a different scanner).
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Feb 11, 2011
Is there a way to get the position parameters for a Biped COM to play with in Track View? All I get are the rotation parameters.
If that's not possible I'd like to know a way to manipulate the animation between 2 keyframes. The TCB parameters don't seem to be working for this.
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Jul 26, 2013
In the Add function documentation there are two parameters XDirectionStartPoint and YDirectionStartPoint.
But are these 3d or 2d points? Maybe 2d points on a sketch.
And if there was a c++ example of use it.
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Oct 12, 2012
I would need a function to sort images based on GPS position, north to south or vest to east. Is that possible or an function that will come in the future.
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Jun 21, 2012
I am having a problem with the perpendicular function when I draw a line. It won't lock at a single point, instead it moves along an axis.
For example, when I want to draw a line in Y direction it moves in the X axis, and opposite if I draw in the X direction.
How can I make the perpendicular function lock to one position?
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Feb 15, 2014
How can I add dimension parameters inside a Curtain Panel Tag family to adjust tag position?
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Jun 22, 2011
I didn't find a way to know the position (x, y) of a layer. I found the dimensions of a layer but not the position. Gimp knows that bacause when I open a file the layers are positioned but I can't find a way to know the layer's position, also with a script.
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Jan 20, 2003
If i draw a path and then stroke, is there any way to vary the thickness on some parts of this path?
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Jul 10, 2004
I want to know if there is a way I can vary the thickness of a paintbrush line in Photoshop without having a tablet. I've done it before in Freehand by toggling the number keys, and I'm hoping that there is a similar way to do it in Adobe programs.
Anybody have any clue or should I just go ahead and invest in a tablet? I've got a lot of control with a mouse so accuracy isn't too much of an issue.
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Dec 16, 2008
Mean I finished my sketching and see some part of the pic that strokes need to be thinner or thicker. I saw this article some where on the net long ago but can't find it
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May 14, 2011
Using:
TB-5300 Slimline Design Tablet
Windows 7 (32 and 64 bit, problem occurs on both)
The problem I am having is that the X-coordinate for my pen tablet is incorrect. The paint brush appears to the left of the screen and doesn't move as far left/right as my pen does. By moving the position of the drawing area I have found that pressure works correctly. Strangely, the position of the mouse when being controlled by the pen tablet is correct, it's just the paint brush which is wrong.
I can correct this problem by uninstalling the pen tablets drivers, but then the pressure sensitivity stops working.
This problem fixed itself for about a few days, but then came back without anything apparently having changed in that time.
It's occuring in both a 32 and 64 bit version of windows.
[URL]
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Apr 15, 2013
Basically, I have one text size in the model space, say 20, and one text size in the paperspace, say 0.008. These are dramatically different. I assume that the reason is due to scale, because your model could be enormous etc, and therefore it makes sense to have such a small font size in the model space.
The problem I'm really having is that I use the same dimstyle in the model space as in the paper space because sometimes I will dimension in the model space and sometimes in the paper space.
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Jun 30, 2013
Is there a way to find out the position of a layer after you move it from the starting point of 0,0 and 0 rotation?
I'm trying to line-up two images and the bottom layer is the reference image so I move the top layer in the x,y direction and rotate the layer until it looks good. But instead of saving I want the new x,y location along with the rotation number to enter into an Imagemagik bash script.
I'm using GIMP 2.6.11, but will update to 2.8 if necessary.
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Jun 30, 2013
Is there a way to find out the position of a layer after you move it from the starting point of 0,0 and 0 rotation?
I'm trying to line-up two images and the bottom layer is the reference image so I move the top layer in the x,y direction and rotate the layer until it looks good. But instead of saving I want the new x,y location along with the rotation number to enter into an Imagemagik bash script.
I'm using GIMP 2.6.11, but will update to 2.8 if necessary.
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May 17, 2013
Situation Basically I have a series of 8-bit bitmap images which all use different palettes but have around 64 colors in common.
This will allow them to be combined with another graphic which uses only those 64 colors in a 3D engine, thereby allowing that graphic to be used with the images with no color misassignments.
I need to be able to set those 64 colors to the same position in the colormap for each image. I could just limit the images to 192 colors, but the loss of information is unacceptable to me.
The task I'd like to manually drag those specific colors to the bottom of the colormap in a set order, but the "Rearrange Colormap" dialogue does not show me what their RGB values are, so there is too much room for error. (Tried in Gimp-2.6 and 2.8)
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Dec 13, 2013
I'm creating a sprite sheet and I need to move my sprites to a specific location.
For example my sprite is 120x120, so I need to place the 5th animated frame at EXACTLY 120x5=600 pixels from zero or at 600, 0. I can't seem to find a way of doing this in GIMP, it shows me a mouse delta position from where I first clicked?
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Jun 21, 2012
I have a question with batch crop. I have about 300 images of same dimension and would like crop to specific position in all of them. In photoshop, I would import all the images as a layer and crop a layer, then export the layer as an individual file.
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Dec 3, 2013
Attached is an image of a frame-generated assembly. The (5) cross members on the left of the image are identical to the (5) cross members on the right (same family, size, & material). However the (5) on the left were originally made in an earlier version of Inventor (probably 2009), & I just added the (5) on the right in Inventor 2014.
The older members have been migrated to the current version, yet you can see a clear color difference between the new version & the old version. Why is it that the colors do not match.
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May 2, 2003
i can't seem to find where the threshold command is on photoshop 6.0..
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Jul 28, 2007
I'm trying to create a threshold image using only two colors of the explosion of the atomic bomb, can anyone tell me how to it. I know it's pretty easy,
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Mar 8, 2013
os windows 7, upgraded to Gimp 2.8.4 I open an .xcf file and go to single window mode. everthing looks ok the zero offsets on the rulers are where they should be and I can see the bottom of the gimp window where the % size change is. I then ask for a new tool bar which is provided and locked to the widow. if i go to full screen and then back the picture is pushed down as are the ruler zero's and i now can't get to the bottom of the screen. this annoying behavior does not seem to happen in multi window mode. attached is a screen capture.
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May 31, 2012
I created a jigsaw puzzle from an image. All the pieces exist in different layer.
Is there a way to get the position of the pieces (a script or a menu command)? I realize I could use the ruler, however, I would like something that would be more exact and less tedious.
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Jun 16, 2011
Dynamic block is for a title block which can be horizontal or vertical and a few different positions.
My lookup table controls the orientation and position of all the items including a number of attributes. But for two attributes I have allowed a grip on the Point Parameters so they can be dragged left/right if there is not enough room when the text is longer.
I can reposition the attributes but if I reposition twice then the Lookup table resets to its "Unmatched" configuration which I don't want. I believe I have to have an "unmatched" setting and "allow reverse lookup" and at the same time I want the user to be able to customize the position of these attributes.
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Jan 18, 2013
after 13.02, the 'threshold' cannot be executed in the actions.
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Aug 5, 2007
I have been using too much threshold, black and white simple stuff. I was wondering if there was anything similar to it but different style?
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Jan 13, 2012
When I use the Cut or Clear function with a graphic design I can punch a hole right through a layer or layers. But with a jpeg photo and duplicate layers all I get is that the selected area turns opaque white. There are work arounds, but it would be simpler to be able to turn a selected area transparent. So what gives? Running Windows 7.
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Aug 17, 2011
One of the most fantastic features of Gimp was it's ability to use a MIDI controller such as this:
It's now not possible to resize brushes because Gimp has no scale function. Scale was much better than the new size which goes to an absurd 10000 pixel brush. This means you can't use set value from MIDI as is done here:
I have to mouse around in UI or use my Wacom strip. The brilliant ergonomics of Gimp via MIDI is ruined.
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Apr 10, 2012
On Windows 7 Home Premium x64, GIMP does not properly restore the position of the Toolbox window with "Save window positions on exit" checked in Preferences > Window Management. The Toolbox window does retain its size, but is placed in a seemingly random place in the top-left area of the screen every time GIMP is launched. Other windows retain their size and shape perfectly. I've searched for a solution to this problem but couldn't find one.
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