Subhadeep Koley

MathWorks

Last seen: mehr als 2 Jahre vor | Aktiv seit 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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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...

mehr als 2 Jahre vor | 0

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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...

etwa 3 Jahre vor | 1

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The Piggy Bank Problem
Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

etwa 3 Jahre vor

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

mehr als 3 Jahre vor | 1

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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 ...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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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 ...

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 0

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

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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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 ...

mehr als 3 Jahre vor | 1

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

mehr als 3 Jahre vor

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'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...

mehr als 3 Jahre vor | 3

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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,...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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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 ...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 1

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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...

mehr als 3 Jahre vor | 0

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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...

mehr als 3 Jahre vor | 0

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