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However, by drawing a straight line through two points on a curve, the value at other points on the curve can be approximated. In the formula for interpolation, x-sub1 and y-sub1 represent the first set of data points of the values observed. X-sub2 and y-sub2 represent the second set of data points.
To interpolate in Excel, use the XLOOKUP function to find the x-values on either side of the input value of x as well as the corresponding y-values.
If a function is only known at a discrete set of data points (xi,yi), interpolation can be used to estimate the value of that function at values of x not included in the data. An interpolation function I(x) passes through the points of a discrete data set, I(xi)=yi.
vq = interp1( x , v , xq ) returns interpolated values of a 1-D function at specific query points using linear interpolation. Vector x contains the sample points, and v contains the corresponding values, v(x). Vector xq contains the coordinates of the query points.
I am currently developing a piece of software using opencv and qt that plots data points. I need to be able fill in an image from incomplete data. I want to interpolate between the points I have. Can anyone recommend a library or function that could help me. I thought maybe the opencv reMap method but I can't seem to get that to work.
The data is a 2-d matrix of intensity values. I want to create an image of some sort. Its a school project.
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