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Questions tagged [bilinear-interpolation]

89 questions
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How to apply a function for each of the various entries from different matrices as index?

I'm writing a function in matlab which mimics the built-in 'imwarp' function (applying geometric transformation) without using any kind of loops. i'm in the final step when i have to call my function for bi-linear interpolation for every index in…
Adeel Ahmad
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C# list of array generate bilinear-interpolation values

Before I start, please accept my apologies that I'm a starter developer. What I want is a grid with data. Only I have a list of an array with 7 points (x, y, value). I want to do this in a grid of 5x5. Only I miss a lot of values. I want to generate…
E75
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How to find the fractional weighting of n colors which contribute to a known color C?

This is related to but not the same as this question (click to go to). However the linked question would need to be solved before this one, or at least the problem understood. This could be considered to be the reverse of the other. This problem is,…
Phil
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The Concept of Bilinear Interpolation by Accessing 2-d array like 1-d array does

In 2-d array, there are pixels of bmp files. and its size is width(3*65536) * height(3*65536) of which I scaled. It's like this. 1 2 3 4 5 6 7 8 9 10 11 12 Between 1 and 2, There are 2 holes as I enlarged the original 2-d array.…
jay
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C++, Bilinear Interpolation to patch holes on the enlarged bitmap Image

To scale bitmap image 3times bigger, I implemented this code and found holes. I decided to use bilinear Interpolation and these above are the code patching the nearest pixel of which weight are calculated like this code. Output[j*hInfo.biWidth+i]…
jay
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How to perform adaptive bilinear interpolation?

I want to implement the adaptive bilinear interpolation method for image upsampling given in this paper. But I am stuck on a very basic question. imresize() in Matlab performs bilinear interpolation by taking a weighted average of pixels in the…
Nancy
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Bilinear interpolation on integer coordinates within a Delaunay triangulation

I have a planar Delaunay triangulation consisting of about 1 million triangles. Each vertex is tagged with several scalar metrics [1], and I would like to see a fast, simple interpolation of each of those metrics on the same regular grid. For…
dholstius
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Fill in the gaps of a 2D array

I have a sparsely populated array like the following. Is there an algorithm that can fill in all the blanks with values that make sense linearly? ie. deduced from the surrounding original values. I've looked at bilinear interpolation and bicubic…
Fidel
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Zooming an Image by bilinear Interpolation method in java

I am trying to read an image, zoom it in to 80*60 and then zoom out the resulted image 5 times by bilinear Interpolation method. But I get this error : Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4800 . Can anyone help me…
Nazi
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How can I upsample/dense my point cloud patches?

I am working on the preparation of training data for point cloud segmentation. I generated nearly 4000 point cloud patches by cropping them with footprints. Since the size of footprints is variable, my patches have different amounts of points. Some…
Güray Çetin
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Improving the performance of a 2D direct lookup table with equidistant inputs (Embedded C)

I am struggling with a lack of performance on the usage of a direct lookup table with equidistant inputs, for a 2D interpolation. The goal is to find the 4 values (z00,z01,z11,z10) in the table z(x,y) corresponding to the two closest values of each…
ArentiusPT
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Scaling the image using Bilinear Interpolation - matlab

I have written a code that reads an image and does scaling of 2 units in x-axis direction. Scaling matrix is filled by values that are read from a text file. Scaling Matrix looks like 2 0 0 0 1 0 0 0 1 Original Image Transformed Image (Scaling…
user7500403
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Texture taken from Item: can I make its filtering be gamma-correct?

If this was a texture that I created, I'd simply make its internalFormat be GL_SRGB. But I'm passing a Qt Quick Item foo into my custom QQuickFramebufferObject GL code, where I take foo->textureProvider()->texture() and use that texture to…
Stefan Monov
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Please help me fin the reason for no output in R

Work: a folder contains name.csv, this file contains filename in columns, and latitude and longitude in next columns. the same folder contains .tif files. I have written code in r to loop through filename each time and find matching .tif file names…
G T
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