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Questions tagged [bilinear-interpolation]

89 questions
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Disable bitmap filtering in Android Jetpack Compose Image

I have pixel-art style images stored in res/drawable with their naturally small scale, but meant to be scaled up for display. However the default behaviour seems to be to blur the upscaled image to try and hide the pixels. How can that be…
Victor Basso
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Bilinear interpolation by convolution

I tried to do the upsampling by transposed convolution.Since I was unable to figure out the kernel weights,I tried the following way. Upsample image by a factor of (using nearest neighbour method) Slide a 2x2 filter with 0.25 values over it. This…
Knilakshan20
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Bilinear interpolation for retrieving a pixel rectangle in OpenCV

This problem comes from function getRectSubPix_8u32f in OpenCV. Basically, the target is to interpolate following pixel's intensity(denote as I(a,b)): but what puzzled me was the code snippet: float a = center.x - ip.x; float b = center.y…
Finley
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Working example of loading, decoding, resize_bilinear(), then encoding, and writing a jpeg image using tensorflow?

I have been unable to get anything but junk output from this small program below. All I want to do is load and decode a jpeg image resize it to (224, 224) using tf.resize_bilinear re-encode it to jpeg and save it to a file import tensorflow as…
John Allard
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The truth value of an array with more than one element is ambiguous

Using this Link for Bilinear Interpolation http://cv-tricks.com/image-segmentation/transpose-convolution-in-tensorflow/ I am trying to get some results using a dummy matrix i.e filter_shape of dimension 4 named as a tensor in my code. But it gives…
Zeeshan Nisar
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Bilinear interpolation artifacts

im trying to do Bilinear Interpolation after rotation in c++ using openCv features, but without using bilinear interpolation implemented in openCv. At my output images, there are always some artifacts (totaly different colours of pixels). Im using…
Štěpán vrša
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Texture filtering for terrain generation

I use low resolution topography texture for my terrain generation with three interpolation algorithms however I can't get rid of checkered pattern. How to fix that and made my terrain smooth? Bilinear interpolation: Constrained Bicubic…
Kedriik
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How to interpolate between fixed values in a 2D grid for biome-generation?

I am currently implementing biome-generation in my game and I want to make the type of a biome dependent on humidity and temperature values that are generated from gradual noise. different Biomes should have different heights and without…
BrunoWallner
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How to perform Bilinear Interpolation to a masked image?

Suppose I have an image with mask, valid pixels are masked as 1 and others 0, how to perform bilinear interpolation to fill all the invalid pixels? for example, image: 1, 0, 0, 4 mask: 1, 0, 0, 1 interpolation result should be: 1, 2, 3, 4 The valid…
Lamp
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How to optimize the custom bilinear sampling alternative to grid_sample for TensorRT inference?

I am trying to covert the model with torch.nn.functional.grid_sample from Pytorch (1.6) to TensorRT (7) through ONNX (opset 11). Opset 11 does not support grid_sample conversion. Custom alternative I found…
Sergiy Snake
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Faulty image with Bilinear Interpolation

I am implementing Bilinear Interpolation to resize image. The function for bilinear interpolation and resizing is as follows: def bl_resize(original_img, new_h, new_w): old_h, old_w, c = original_img.shape resized = np.ones((new_h, new_w,…
Meghal Darji
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Interpolation vs Average

I'm new of computer vision concepts and I'd like to know why, when we double the size of an image, we should use bilinear interpolation where pixels haven't values instead of average between nearest known values pixels.
M.Morris
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Image rotation in matlab using bilinear-interpolation

clear I = imread('256.jpg'); %imshow(I); center = 128; [x, y] = size(I); % declare image size array Original = [x, y]; Rotated_I = zeros(x,y); %declare size of array to store pixel theta = 90; for row = 1:y for column = 1:x x_original…
Dohoon Kim
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Applying homography to image

I am stuck at this homography problem. I have to apply homography and then 2d bilinear interpolation to render a image so that I see a birds eye view. I successfully computed the homography(I guess). I am unable to figure out how to apply this…
Abhigyan Singh
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How to implement bilinear interpolation?

I'm trying to implement bilinear interpolation to an image after affine transformation (using numpy only), and I don't understand how to implement ? I know how to use nearest neighbor interpolation (easy): X = np.round(coords[0,:]) Y =…
abc123
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