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New paper accepted

December 14, 2012 1 comment

We got a paper accepted on the IEEE Trans. on Image Processing 🙂 . It is about a new micro pattern descriptor that relies on directional numbers (direction indexes in a local neighborhood), and we tested it on face analysis tasks, namely, face identification and expression recognition. We’ve been working on these ideas for some time, and sadly the revision was delayed some time, but finally it’s over.

I hope to give more details next week when I have more time, and give some insights on the ideas behind. Meanwhile, I leave you with the abstract and the pre-print at our site or at the IEEEXplore

Abstract—This paper proposes a novel local feature descriptor, Local Directional Number Pattern (LDN), for face analysis: face and expression recognition. LDN encodes the directional information of the face’s textures (i.e., the texture’s structure) in a compact way, producing a more discriminative code than current methods. We compute the structure of each micro-pattern with the aid of a compass mask, that extracts directional information, and we encode such information using the prominent direction indexes (directional numbers) and sign—which allows us to distinguish among similar structural patterns that have different intensity transitions. We divide the face into several regions, and extract the distribution of the LDN features from them. Then, we concatenate these features into a feature vector, and we use it as a face descriptor. We perform several experiments in which our descriptor performs consistently under illumination, noise, expression, and time lapse variations. Moreover, we test our descriptor with different masks to analyze its performance in different face analysis tasks.

Converciencia 2012: streaming

July 25, 2012 Leave a comment
Categories: News Tags: , , ,

Converciencia 2012: ciencia en Guatemala

July 20, 2012 2 comments
Converciencia 2012

Converciencia 2012

Señores y señoras, niños y niñas… la otra semana da inicio Converciencia, en su séptima versión, y se realizará en INTECAP. Al parecer la entrada es “libre”, pero hay que inscribirse antes de llegar. Me imagino que pueden tener limite de participantes, o no se por que razón. Para más información revisen el programa.

Si no saben que es Converciencia, pues vayan y averigüenlo! Sí quieren saber que es antes de ir, pues sigan leyendo.

En resumén, es un encuentro entre científicos guatemaltecos y, espero yo, el público en general, donde podemos palpar la ciencia en Guatemala. En esta actividad se reúnen varios investigadores guatemaltecos con una idea en mente: divulgar y hacer ciencia en Guatemala. En el sitio lo definen como:

CONVERCIENCIA es una actividad académica que el Consejo Nacional de Ciencia y Tecnología, CONCYT, lleva a cabo anualmente, desde 2005, por intermedio de la Secretaría Nacional de Ciencia y Tecnología, SENACYT, como parte de su política actual de impulsar efectivamente el desarrollo de la ciencia, la tecnología y la innovación en Guatemala.

CONCYT

Si alguna vez te preguntaste: ¿Qué hace un científico en Guatemala?, y si te han dicho “si estudias ciencia te vas a morir de hambre”, como bien lo mencionaban antes. Pues no te quedes con la duda. En Converciencia pueden haber respuestas… 💡

vivos pues!

Cleaning up…

July 5, 2012 Leave a comment

Hi, I’ve been quite busy lately. I’m cleaning up the blog, and posting a little bit about the research.

I hope to put more of the stuff I’ve been working one. I just have to find the time.

So, the “Research” menu has now its the first post (of many I hope), and I will be adding more soon.

Stay tuned…

Categories: News
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