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Subhadeep Koley

MathWorks

Last seen: alrededor de 2 años hace Con actividad desde 2019

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I am a Software Engineer here at The MathWorks.

My areas of interest are Image Processing, Pattern Recognition, Computer Vision & Graphics, and plotting.

DISCLAIMER: Any advice or opinions here are my own and in no way reflect that of The MathWorks.

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Respondida
How to calculate signal to noise ratio of hyperspectral image refolded in 2D matrix format?
As per my understanding, "A single value for SNR" indicates the overall SNR between the noisy and cleaned data. While in order t...

alrededor de 2 años hace | 0

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Respondida
MATLAB hyperspectral toolbox issues
1) The error is originating from line number 53 of "enviinfo.m". It seems that you have one local custom function in the name o...

más de 2 años hace | 1

Respondida
how to use 'createImagePatchesFromHypercube' function
It seems you're trying to execute createImagePatchesFromHypercube outside of the "Classify Hyperspectral Images Using Deep Learn...

casi 3 años hace | 1

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Respondida
How to make an ENVI header file."?
Looks like the indian_pines.hdr ENVI header file has been modified in your system. For a valid ENVI header file, the first four ...

casi 3 años hace | 0

Respondida
Reading a RAW file from a hyperspectral camera using ENVI information
You can use the enviinfo(__) function to read metadata from your ENVI header file (.hdr file), and then you can use multibandrea...

casi 3 años hace | 1

Respondida
How to read hyperspectral data without wavelenth data?
If you know the height, width, and number of spectral bands of your data, you can try using multibandread(_). However, in orde...

casi 3 años hace | 0

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Respondida
How to read hyperspectral data
The error is originating from line number 53 of "enviinfo.m". I suspect you have one local custom function in the name of "envi...

casi 3 años hace | 0

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Respondida
My batch image processing is only processing the last image of the folder!
You're calculating imhist() outside of the for loop that is why only the last read image is being processed. You need to use the...

casi 3 años hace | 1

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Respondida
Phase Scrambling/Fourier transform of Images?
phase_scrambled_img is of type double but its range is beyond [0, 1], therefore use the below syntax so that imshow(_) can scale...

casi 3 años hace | 0

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Respondida
The following cmd doesnt work "openExample('uav/ConnectPosesOfAllValidUAVDubinsPathsExample')"
The example you're trying to launch comes under UAV Toolbox. You have to have UAV Toolbox installed in order to use that example...

alrededor de 3 años hace | 1

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Respondida
Hyperspectral Imaging preprocessing method for raw data acquired from hyperspectral camera? tools or algorithm
You can use Image Processing Toolbox's Hyperspectral Imaging Library support package. It can be downloaded from here. You can ...

alrededor de 3 años hace | 0

Respondida
How to detect and separate pixels in an image
rgbImg = imread('image.png'); grayImg = rgb2gray(rgbImg); greenMask = detectGreen(rgbImg); figure imshow(rgbImg); hold on...

alrededor de 3 años hace | 0

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Respondida
Help with User defined function
function y = UnitConversionsFunction(x, options) % Validate that value is a character vector or string scalar. (Works only wi...

alrededor de 3 años hace | 0

Respondida
Goodness of fit using chi2gof
Wasim, this link might help you.

alrededor de 3 años hace | 0

Respondida
How do I change the array of 200x2x100 to 100x2x200?
% Generate demo data data = rand(200, 2, 100); % Permute the data newData = permute(data, [3 2 1]); size(data) size(n...

alrededor de 3 años hace | 1

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Respondida
App Designer Plot Multiple Graph
The attached minimum working example App might help you! Have a look.

alrededor de 3 años hace | 1

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Respondida
How can I overlay an edge detected from a binary image onto a RBG image?
% Read the RGB images fig00RefFull = imread('00-Ref-Empty.jpg'); fig00RefEmpty = imread('00-Ref-Full.jpg'); % Convert those...

alrededor de 3 años hace | 0

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Respondida
MATLAB app designer not playing sounds
I have attached one demo minimum working example. Have a look. It might help you fix the issue. Also, if possible provide the...

alrededor de 3 años hace | 1

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Respondida
how to change hyperspectral image size array?
This code snippet might help. % Creating a random data dataCube = rand(3248,242,256); % Permuting the 2nd and 3rd channel ...

alrededor de 3 años hace | 1

Respondida
'unrecognized function or variable 'yolov30ObjectDetector'
This example you're executing, requires the Computer Vision Toolbox™ Model for YOLO v3 Object Detection. You can download & inst...

alrededor de 3 años hace | 3

Respondida
How to import a .MAP OMNIC picta file into matlab
As, .MAP is not a standard file format. It is difficult to provide exact solution. However, if the .MAP file is a binary file,...

alrededor de 3 años hace | 0

Respondida
Displaying Multispectral Image in MATLAB
You can not use imshow(_) or imagesc(_) to display Multi-plane images having more than 3 channels. You can use sliceViewer(_) t...

alrededor de 3 años hace | 1

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Respondida
Combining hyperspectral image bands R, G, B and NIR
% Read the TIF file cube = imread('yourFile.tif'); % cube is your 8 band TIF file % Extract R, G, B, and NIR band according ...

alrededor de 3 años hace | 0

Respondida
Read and Extract channel data from Hyperspectral images
You can use the hypercube(__) function to read and explore hyperspectral images. % Read the hyperspectral image (specify your i...

alrededor de 3 años hace | 0

Respondida
Stacking indexed images and view the resulting volume
This code snippet might help. A = imread('image2.png'); B = imread('image3.png'); C = imread('image4.png'); [D, map] = rgb...

alrededor de 3 años hace | 0

Respondida
I have multispectral image of [ 8225,8850,6]. How to read image and i need to seperate bands for analysis?
For visualization of individual pixel spectra / hyperspectral band image you can use the interactive hyperspetralViewer App. e.g...

alrededor de 3 años hace | 1

Respondida
How can I combine three hyperspectral bands into an "RGB" image?
You can use the hypercube(__) function to read your ENVI file (.dat and .hdr file pair), and also the colorize(__) method will h...

alrededor de 3 años hace | 0

Respondida
How to create RGB image with 3 bands from hyperspectral image?
You can use the hypercube(__) function to read Hyperion EO-1 L1R files and also the colorize(__) method will help you to estimat...

alrededor de 3 años hace | 0

Respondida
IN remote sensing seven spectral bands are exists in multi spectral images, how to make seven spectral bands of images into one false color image in matlab not in ERDAS
If anyone using R2020a or later, then the colorize function of the hypercube might be useful. The above mentioned fetures come ...

alrededor de 3 años hace | 0

Respondida
hypercube or hyperpca not found. Not even in R2020b .why ?
hypercube, hyperpca and other hyperspectral related functions come under Image Processing Toolbox's Hyperspectral Imaging Librar...

más de 3 años hace | 2

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