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Latest Activity

George Nelson Moraes liked Sandipan Dey's blog post Some Applications of Markov Chain in Python
Oct 23
Prasanth liked Sandipan Dey's blog post Dogs vs. Cats: Image Classification with Deep Learning using TensorFlow in Python
Sep 8
Dumitru Puscasu liked Sandipan Dey's blog post Solving Some Image Processing Problems with Python libraries - Part 3
Sep 7
Sandipan Dey posted a blog post

Solving Some Image Processing Problems with Python libraries - Part 3

In this article a few more popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems.Histogram Matching with color imagesAs described here, here is the algorithm:The cumulative histogram is computed for each image dataset, see the figure below.For any particular value (xi) in the input image data to be adjusted has a…See More
Aug 29
Sandipan Dey's blog post was featured

Solving Some Image Processing Problems with Python libraries - Part 3

In this article a few more popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems.Histogram Matching with color imagesAs described here, here is the algorithm:The cumulative histogram is computed for each image dataset, see the figure below.For any particular value (xi) in the input image data to be adjusted has a…See More
Aug 29
Prabhakaran Sampath liked Sandipan Dey's blog post Solving Some Image Processing Problems with Python libraries - Part 2
Aug 24
Sandipan Dey posted a blog post

Solving Some Image Processing Problems with Python libraries - Part 2

In this article a few more popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems.Some Applications of DFT 0. Fourier Transform of a Gaussian Kernel is another Gaussian KernelAlso, the spread in the frequency domain  inversely proportional to the spread in the spatial domain. Here is the proof:…See More
Aug 23
Sandipan Dey's blog post was featured

Solving Some Image Processing Problems with Python libraries - Part 2

In this article a few more popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems.Some Applications of DFT 0. Fourier Transform of a Gaussian Kernel is another Gaussian KernelAlso, the spread in the frequency domain  inversely proportional to the spread in the spatial domain. Here is the proof:…See More
Aug 23
Sandipan Dey posted a blog post

Solving Some Image Processing Problems with Python libraries - Part 1

In this article a few popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems. Image Transformations and Warping 0. Display RGB image color channels in 3DA gray-scale image can be thought of a 2-D function f(x,y) of the pixel locations (x,y), that maps each pixel into its corresponding gray level (an integer in [0,255], e.g.,).For an RGB image there are 3 such functions, f_R(x,y),…See More
Aug 18
Sandipan Dey's blog post was featured

Solving Some Image Processing Problems with Python libraries - Part 1

In this article a few popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems. Image Transformations and Warping 0. Display RGB image color channels in 3DA gray-scale image can be thought of a 2-D function f(x,y) of the pixel locations (x,y), that maps each pixel into its corresponding gray level (an integer in [0,255], e.g.,).For an RGB image there are 3 such functions, f_R(x,y),…See More
Aug 18
Bogdan Oancea liked Sandipan Dey's blog post Brand-Value Analysis with simple Sentiment Analysis using Shiny / R
Aug 9
Sandipan Dey commented on Sandipan Dey's blog post Data Science with Python: Exploratory Analysis with Movie-Ratings and Fraud Detection with Credit-Card Transactions
"@Georgios Sarantitis This problem appeared in an project in a data science course and i just had the time to upload the report here, to familiarize the audience with different techniques available to classify an imbalanced dataset. This is…"
Jul 16
Sandipan Dey posted a blog post

Data Science with Python: Exploratory Analysis with Movie-Ratings and Fraud Detection with Credit-Card Transactions

The following problems are taken from the projects / assignments in the edX course Python for Data Science and the coursera course Applied Machine Learning in Python (UMich). 1. Exploratory Analysis to Find Trends in Average Movie Ratings for different GenresDataset● The IMDB Movie Dataset (MovieLens 20M) is used for the analysis. ● The dataset is downloaded from here . ● This dataset contains 20 million ratings and 465,000 tag…See More
Jul 16
Mohammad liked Sandipan Dey's blog post Few Machine Learning Problems (with Python implementation)
Jul 14
John Ho liked Sandipan Dey's blog post Data Science with Python: Exploratory Analysis with Movie-Ratings and Fraud Detection with Credit-Card Transactions
Jul 1
Abdoulaye Diallo liked Sandipan Dey's blog post Some Social Network Analysis with Python
Jun 19

Profile Information

Short Bio
Currently Working as
Data Scientist, Turnoutnow

Research Interests
Data Mining, Machine Learning, Text Mining, Natural Language Processing, Information Retrieval, Optimization, Pattern Recognition, Algorithms, Programming/Problem Solving, Computational Photography, Computer Vision, Image Processing, Mathematics, Distributed/Cloud Computing.

Hobbies
Music, Movies

Education
MS, Computer Science, UMBC, USA
BE, Computer Science & Engineering, Jadavpur University, Calcutta, India

Rpubs
http://rpubs.com/sandipan/

WordPress blogs
https://sandipanweb.wordpress.com/

Tumblr blogs
http://sandipanumbc.tumblr.com/

Gmail blogs
https://www.blogger.com/blogger.g?blogID=7539416912746312433#allposts

Linkedin profile
https://www.linkedin.com/in/sandipan-dey-0370276

github
https://github.com/sandipan

Stackoverflow
http://stackoverflow.com/users/4706171/sandipan

DBLP
http://dblp.uni-trier.de/pers/hd/d/Dey:Sandipan

ArnetMiner
https://cn.aminer.org/profile/sandipan/53f4739edabfaee43ed2a4f6

Academia
https://umbc.academia.edu/SDey

ResearchGate
https://www.researchgate.net/profile/Sandipan_Dey

Rosalind
http://rosalind.info/users/sandipan/

Mathworks
http://demonstrations.wolfram.com/preview.html?draft/04814/000001/

Shinyapp
https://sandipan.shinyapps.io/rchartsentiment/

Coursera Profile
https://www.coursera.org/user/i/f34069ce8df6de7dbebfedfb7e760d9f
My Web Site Or LinkedIn Profile
http://https://www.linkedin.com/in/sandipan-dey-0370276
Field of Expertise
Data Science, Machine Learning, AI, Business Analytics, Deep Learning
Professional Status
Technical
Years of Experience:
10+
Your Job Title:
Data Scientist
Interests:
Other

Sandipan Dey's Blog

Solving Some Image Processing Problems with Python libraries - Part 3

Posted on August 16, 2018 at 1:30pm 0 Comments

In this article a few more popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems.

Histogram Matching with color images

As described here, here is the algorithm:

  1. The cumulative histogram is computed for each image dataset, see the figure below.
  2. For any…
Continue

Solving Some Image Processing Problems with Python libraries - Part 2

Posted on August 16, 2018 at 1:00pm 0 Comments

In this article a few more popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems.

Some Applications of DFT 

0. Fourier Transform of a Gaussian Kernel is another Gaussian Kernel

Also, the spread in the frequency domain  inversely proportional to the spread in the spatial domain. Here is the proof:…

Continue

Solving Some Image Processing Problems with Python libraries - Part 1

Posted on August 16, 2018 at 1:00pm 0 Comments

In this article a few popular image processing problems along with their solutions are going to be discussed. Python image processing libraries are going to be used to solve these problems.

 

Image Transformations and Warping

 

0. Display RGB image color channels in 3D

  1. A gray-scale image can be thought of a 2-D function f(x,y) of the pixel…
Continue

Few Machine Learning Problems (with Python implementation)

Posted on May 31, 2018 at 10:00pm 0 Comments

1. Back-propagation

This problem also appeared as an assignment problem in the coursera online course Mathematics for Machine Learning: Multivariate Calculus. The description of the problem is taken from the assignment itself.

In this assignment, we shall train a neural network to draw a curve. The curve takes one input variable, the…

Continue

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