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Hello,
I have the coordinates of the top left Point of a rectangle as well as its width, height and rotation from 0 to 180 and -0 to -180.
I am trying to get the bounding coordinates of the actual box around the rectangle. What is a simple way of calculating...
Started by coulix on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
Transform and call it max_x Ditto with the y's Your bounding....
If you think the rectangle may spill over the imagable area post respectively of the obtained x,y coordinates to define your new bounding box.
For all points concerned.
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I have the need to determine the bounding rectangle for a polygon at an arbitrary angle. This picture illustrates what I need to do:
The pink rectangle is what I need to determine at various angles for simple 2d polygons.
Any solutions are much appreciated...
Started by kevin42 on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Then you can use the min/max x/y coordinates....
For a given 2D polygon, how do you calculate the position of a bounding rectangle for whichTo get a bounding box with a certain angle, rotate the polygon the other way round by that angle.
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Given a monochrome bitmap:
0010001 000101 00001 1 000101 101 0010001 10001 101 1 100001 100001
I want to be able to find the bounding rectangle of each object on the bitmap.
Are there any established algorithms that I can use?
Answer Snippets (Read the full thread at stackoverflow):
Basically you need.
It does a lot of things, including finding bounding boxes.
Blobs are used in lots of machine vision and inspection applications function source .
Perimeter, bounding-box, etc.
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Ask your Facebook Friends
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I need some help coming up with an algorithm to determine the minimum bounding rectangle around a set of lat/lon coordinates. It is OK to assume a flat earth since the coordinates will not be too far apart. Pseudocode is OK, but if someone has done this...
Started by Matthew Belk on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
For more sophisticated solutions, see:
http://stackoverflow.com/questions/1298003/calculate-minimum-area-rectangle-for-a-polygon
If you're in Objective.
And use those as the bounds of your rectangle.
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I need to perform a flood fill on a region of an image. However I do not actually need the resulting image, I only need to know the smallest rectangle containing all pixels that would be changed by the flood fill.
Is there a variant of a flood fill algorithm...
Started by finnw on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
When you can't go right+down anymore, then you need ... .
Find the bottom right corner of the real edge:
You can do this by going as far right+down as possible inside your color .
Basically you need to determine biggestX, biggestY, smallestX, and smallestY .
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Maths101 question - does anyone know how to calculate an ellipse (width/height) that will enclose a given rectangle. Obviously there is no single ellipse - I'm after an algorithm that will give me various width/height combinations - or perhaps the smallest...
Answer Snippets (Read the full thread at stackoverflow):
For a square with half side length = 1, the radius of the circle would be sqrt is more precise than "enclosed"), you ... .
If you give your ellipse the same aspect ratio as the rectangle, you can work on the basis into the required rectangle.
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In AS3, I have a Sprite that has a Z axis rotation applied.
How do I calculate that Sprite's dimensions (it's original size) from Sprite.rotationZ and Sprite.getRect(...)?
Started by Ben on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
It can also be done without ever seeing it visually if you switch the rotationZ back once you get your width and height, like ... .
Antpaw's answer is best / easiest.
Sprite.width and sprite.height on sprite.rotationZ = 0 would give you the original size .
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I have a table with thousands of addresses as points.
Is there a function in postgis that will allow me to get a bounding polygon around these points and return it as a polygon?
update I am looking for a more complex polygon than just a bounding rectangle...
Started by ADAM on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
It may be understood.
As
minimum bounding rectangle (also known as MBR or envelope) for which you can use ST_Envelope be not 100% clear from your question what you mean as more bounding polygon .
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I've googled till I'm blue in the face, and unless I'm missing something really obvious, I can't find any algorithms for calculating the bounding box of a 2D sector.
Given the centre point of the enclosing circle, the radius, and the angles of the extent...
Started by Steve Folly on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Find the max and min of ....
This is your bounding box I'm going points to find.
The only other possible) Calculate the min and max x and y from the above points .
Of the bounding rectangle, and this is the only case when it will be.
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Drawing on a QPicture should update its bounding rect. Like this:
>>> picture = QPicture() >>> painter = QPainter(picture) >>> picture.boundingRect() QRect(0,0,0,0) >>> painter.drawRect(20,20,50,50) >>> picture...
Started by Georg on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
The boundingRect (if not null) is set to the what the bounding rectangle should a bounding....
The Bounding Rectangle after the text parameter (which is apparently different than the rectangle to the specified flags.
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