I have a binary itk image that I am trying to fill the holes using itk::BinaryFillholeImageFilter
using FillholeFilterType=itk::BinaryFillholeImageFilter<ImageType>;
FillholeFilterType::Pointer fillHoleFilter=FillholeFilterType::New();
fillHoleFilter->SetInput(someFilter->GetOutput());
fillHoleFilter->SetForegroundValue(itk::NumericTraits<PixelType>::max());
fillHoleFilter->Update();
However, it does not fill the holes. ImageType is float and its dimension is 3. How to solve this issue?
I ran SimpleITK.BinaryFillhole on your image, setting the foreground value to 1.0. Basically the same thing you did except the function version of the filter. It worked as expected.
The BinaryFillhole filter fills in holes that are contained completely within the object. In your case, there were some tiny, 1 pixel, holes that were filled in.
Maybe you were expecting some of the holes/junk along the object boundary to be filled. Because those holes are in some way (perhaps very small way) connected to the boundary, the filter does not fill those holes.
Perhaps you could try some smoothing of the image first.
BinaryFillholeImageFilter expects a binary image. Convert your image to itk::Image<unsigned char, 3> first, and then apply hole filling.
Related
In the attached Google charts Pie chart the labels fit well inside the segments. Determining the length of a bit of text in HTML5 canvas is easy enough - but how do you determine whether the label will fit into a particular segment (using trigonometry) ? As you can see on the image, two of the segments don't have labels inside the segment.
EDIT: Here's an example of what I have at the moment: https://www.rgraph.net/tests/canvas.pie/in-pie-labels.html
As you see the labels for the small segments overlap. What I'm after is a way to calculate whether there's enough space for the labels at the point where they're going to be rendered. If not, I can just not draw the label like in the example image above.
Could chord size be useful to do this?
Here's the forumulae for the chord size that I found via Google:
"Chord length using trigonometry = 2 × r × sin(θ/2); where 'r' is the radius of the circle and 'θ' is the angle subtended at the center by the chord."
I sorted it (in about one hour) after 3 days of trying to calculate it with trig by using the built-in context.isPointInPath() function...
Draw the text (transparent color) to get the coordinates (x/y/w/h) of it. You might be able to get away with measuring it to get the width and height.
Draw the segment in a transparent color and do not stroke or fill it. Also, do not close the path.
Test each corner of the text rectangle (formed the x/y/w/h that you got above) using the context.isPointInPath() function. If the function returns true for each corner of the rectangle formed by the coordinates of the text, then the text will fit into the segment.
I've been searching and searching for an answer to my question, but I can't seem to find anything. Does anyone know of a way to wrap/float text around a chart or image in SSRS? I was hoping for some kind of option similar to the blue one below in Word, but no luck there:
I found the following post, which has a good example image of what I'm looking for, but doesn't have any helpful answers (I'm not using Crystal Reports, I'm using BIDS SSRS through Visual Studio 2015).
Crystal report (or SSRS) flowing text around image
I've tried the following:
Overlaying a text box on top of the image (rendering shoves the image below the text)
Trying to find or create a mad scientist algorithm that can split the text after a certain number of characters, but not in the middle of a word, chop off the rest, and continue the rest of the text in a separate textbox under the image (not a mad scientist, so no luck)
Thanks for any tips!
There's no built in way to do this in SSRS.
Someone wrote a function that determines how many pixels are in a given text string.
Truncate textbox content with ellipsis in SSRS
Public Function TextWidth(str As String) AS Double
'Returns the width, in pixels, of a string, assuming Tahoma size 8.
Dim size As System.Drawing.SizeF
Dim font As New system.Drawing.Font("Tahoma", 8)
size = System.Windows.Forms.TextRenderer.MeasureText(str, font)
TextWidth = size.Width
End Function
You may be able to use this to figure out where to make a break in the first text box and spill the rest to the second. You'd just need to do testing to figure out how many pixels of text your first text box holds.
Once you figure out how many pixels would fit (I would just fill the first text box with text then use the function to see how many pixels that text is), change the other TextCap function to return either the first or second part at the pixel split. You could add an Argument in the function to indicate whether to return the first or second part of the text. Then use the function in the first text box to return the first part and the second part in the second text box.
It's a bit of work but seems feasible. It depends on how bad you want it and how much time you have.
I recently made a game with game maker and I've tried converting it to html5, but it's got some big errors... here is the game in html format: http://ivatrix.com/Game/index.html
First off, text is meant to appear in the top left like how you can see in this screenshot: http://gyazo.com/baa386fe06cfac9439c83b6e5192efd8 the text only appears after you create a combo.
Secondly, when you click on an orb it's meant to scale down to half it's size then scale up to 1.5x it's size, but instead it's shrinking until it's 1px large then infinitely increasing in size. Draw code is here:
if sl=1
{
if (s=0.6 or s=1) then d=d*(-1)
s+=d
if(frozen=1)
{
draw_sprite_ext(sprite_index,global.skin,x,y,s,s,0,c_blue,1)
}
}
And then there's other small errors like some text won't display, particle effects don't seem to draw, the game always returns saying there is no match on the board. That's all I've found so far.
Does anyone have any idea what I can do to fix this?
Thanks.
Since no one has provided an answer and I've found one myself, I'll put it up here so others in the same boat can benefit as well. Practically, the source of all my problems with floating point numbers being irregular, for example instead of it being 1 it could be 1.000000003, which meant if you were to check if that variable was equal to one, it would return false. Further information here: http://help.yoyogames.com/entries/77891197-HTML5-Issues-And-Differences
So for an example in my case, I changed the line
if (s=0.6 or s=1) then d=d*(-1)
to
if (s<0.6 or s>1) then d=d*(-1)
And now the problem is fixed.
I did an thinning operation on vessels, and now I'm trying to reconstruct it.
How to expand them to normal vessels in ITK when I have a skeleton line and radius values for each pixel?
DISCLAIMER: This could be slow, but since no other answer has been suggested, here you go.
Since your question does not indicate this, I'm assuming that you're talking about a 2D image, but the following approach can be extended for 3D too. This is how I'd go about it:
Create a blank image with zero filled pixel values
Create multiple instances of disk/sphere ShapedNeighborhoodIterator each having a different radius on the blank image (choose the most common radii from the vessel width histogram).
Visit each pixel in the binary skeleton image. When you come upon a white (vessel skeleton) pixel, recollect the vessel radius at that pixel.
If you already have a ShapedNeighborhoodIterator for that radius value, take the iterator to the pixel location in the blank image and fill up a disk/sphere of white pixels centered about that pixel. If you don't have a ShapedNeighborhoodIterator for that radius value, create one and do the same operation.
Once you finish iterating over the skeletonized image, you will have a reconstructed tree in the other image. Note that step 2 is optional, but will help you achieve faster computation.
I'm trying to position an image on top of another image based upon the make-up of the smaller image. The smaller image is a cut-out of a larger image and I need it to be positioned exactly on the larger image to make it look like a single image, but allow for separate filters and alphas to be applied. As the images are not simple rectangles or circles, but complex satellite images, I cannot simply redraw them in code. I have quite a few images and therefore do not feel like manually finding the position of each image every and hard setting them manually in actionscript. Is there any way for me to sample a small 5-10 sq. pixel area against the larger image and set the x and y values of the smaller image if a perfect match is found? All the images are in an array and iterating through them has already been set, I just need a way to sample and match pixels. My first guess was to loop the images pixel by pixel right and down, covering the whole bitmap and moving to the next child in the array once a match was found, leaving the matched child where it was when the perfect match was found.
I hope I understood your question correctly.
There may be an option that uses copypixels to achieve what you want. You can use the bitmapdata.rect value to determine the size of the sample you want, and loop through the bigger bitmap using thet rectangle and a moving point. Let's see if I can code this out...
function findBitmapInBitmap(tinyimg:BitmapData, largeimg:BitmapData):Point {
var rect:Rectangle = tinyimg.rect;
var xbound:uint = largeimg.rect.width;
var ybound:uint = largeimg.rect.height;
var imgtest:BitmapData = new BitmapData(tinyimg.rect.width, tinyimg.rect.height);
for (var ypos:uint = 0, y <= ybound, y++) {
for (var xpos:uint = 0, x <= xbound, x++) {
imgtest.copyPixels(largeimg, rect, new Point(xpos, ypos);
if (imgtest.compare(tinyimg) == 0) return new Point(xpos, ypos);
}
}
return new Point(-1,-1); // Dummy value, indicating no match.
}
Something along those lines should work - I'm sure there's room for code elegance and possible optimization. However, it seems like something like this method would be very slow, since you'd have to check each pixel for a match.
There is a better way. Split your big image into layers, and use the blitting technique to composite them at runtime. In your case, you could create a ground texture without satellites, and then create the satellites separately, and use the copyPixels method to place them whereever you want. Google "blitting in as3" to find some good tutorials. I'm currently working on a game project that uses this technique and it's a very good method.
Good luck!
Edit: Forgot to code in a default return statement. Using this method, you'd have to return an invalid point (like (-1,-1)) and check for it outside the function. Alternatively, you could just copy your small bitmap to the big one within the function, which would be much more logical, but I don't know your requirements.
You need to find pixel sequence in the big image. BitmapData.getPixel gives you pixel value. So get first pixel from small image, find it in big image, then continue comparing until you find full match. If you have trouble to code that, feel free to ask.
For the actual comparison, there's BitmapData.compare which returns the number 0 if the BitmapData objects are equivalent.