5 Answered Questions for the topic projection

Projection Linear Algebra

05/12/20

#### How to construct a matrix to project 4-dimensional space to a 2-dimensional plane?

How to Construct a matrix to project vectors in 4-dimensional space to a 2-dimensional plane that lies in the space and passes through the origin and the points (1,-1, -1, 1) and (1, -1, 1, 1).

05/12/20

#### How to construct a matrixto project 4-dimensional space to a 2-dimensional plane?

How to Construct a matrix to project vectors in 4-dimensional space to a 2-dimensional plane that lies in the space and passes through the origin and the points (1 ,-1, -1, 1) and (1, -1, 1, 1).

#### I need to work out the elipse a half circle that is vertical leaves on to a pitched surface

Say the half circle had a radius of 800mm and it was casting back of to a pitched line of 45 degrees it would leave an elipse how do i work that out ?
And is therr a set formula so i can change...
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04/12/19

#### Is there a map that displays every country at its correct relative size?

I know that the standard Mercator projection is completely wrong when it comes to the relative sizes of countries (Greenland appears relatively much larger than in reality, for example). AFAIK they...
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04/03/19

#### Lens correction projection?

What is the simplest way to un-warp a photo made using fisheye or wide-angle lens? I'm looking a pixel projection formula that has few parameters. Camera and lens parameters will not be known, so...
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