Blogs de Ciência

Jan 06

I’m back

Sheep @ Info and Tech in Signals Categorias: Ciência Geral, Scilab, digital image processing, digital signal processing, free software, neural network

I will travel today and my return is next Monday. I will start a tutorial about Scilab, I'm thinking in create a new blog over the English version of the Scilab tutorial.I'd like that the readers comment this post with suggestions about examples areas like digital signal and image processing, computational intelligence, automation and control, etc...I will use the suggestions on the Scilab's codes that I will develop.I created a new blog (all in English). I'd like to receive visits on my new blog.

Nov 02

Vowels in Sign Language

Sheep @ Info and Tech in Signals Categorias: Ciência Geral, SIVP, Scilab, computation, computational vision, digital image processing, engineering, free software, linux, neural network, simulation, threshold

I recorded some videos more to my mastering qualify (the alphabet in Libras - Brazilian Sign Language).I'm having problems with the Scilab (it doesn't read the videos), thus I used the mplayer to extract the frames. For extract frames from a video, I use the command:>> mplayer -vo jpeg name_of_the_file.aviNow, I'm doing tests about skin segmentation. I tried threshold and clustering algorithms, but nothing works with all pictures that I have.If anyone can helps me, I will be very grateful.These are some pictures that I have:

Letter 'A':

Letter 'E':

Letter 'I':

Letter 'O':

Letter 'U':

Set 30

Neural Segmentation of Hands

Sheep @ Info and Tech in Signals Categorias: Ciência Geral, SIRENE, SIVP, Scilab, biometria, computation, computational vision, digital image processing, engineering, neural network

I developed an algorithm for segmentation of objects in digital images.I maked this algorithm because I will need do segmentation of hand in my mastering project.This a video whose I do for show the result.The algorithm consists in build 2 clusters, the first for mapping the object and the second for mapping the ground.I used Self-Organizing Maps for build the clusters.I wrote the code in Scilab, using the SIVP toolbox.

Set 22