Aritmetic Compression of Weighted Finite Automata

نویسندگان

  • Jarkko Kari
  • Pasi Fränti
چکیده

Karel Culik and the first author have demonstrated how Weighted Finite Automata (WFA) provide a strong tool for image compression [1, 2, 3, 4]. In the present article we introduce an improved method for the last step of the compression algorithm: for compressing the WFA that approximates the given image. Our method is based on arithmetic compression of sparse matrices.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

On Succinct Representations of Textured Surfaces by Weighted Finite Automata

Generalized finite automata with weights for states and transitions have been successfully applied to image generation for more than a decade now. Bilevel images (black and white), grayscaleor color-images and even video sequences can be effectively coded as weighted finite automata. Since each state represents a subimage within those automata the weighted transitions can exploit self-similarit...

متن کامل

Hyper-minimisation of deterministic weighted finite automata over semifields

Hyper-minimisation of deterministic finite automata is a recently introduced state reduction technique that allows a finite change in the recognised language. A generalisation of this lossy compression method to the weighted setting over semifields is presented, which allows the recognised formal power series to differ for finitely many input strings. First, the structure of hyper-minimal deter...

متن کامل

Better Compression Performance by Compressing Sliced Bit Planes of Image Using Weighted Finite Automata

Weighted Finite Automata (WFA) is an efficient structure for digital image storage and is successfully applied for the image compression purpose. This paper introduces the idea of slicing image into eight bit planes and then compressing each bit planes individually using proposed WFA inference algorithm. Furthermore, the proposed algorithm uses the concept of invertible resolution wise mapping ...

متن کامل

M . Droste and P . Gastin Weighted automata and weighted logics Research Report LSV - 05 - 13 July 2005

Weighted automata are used to describe quantitative properties in various areas such as probabilistic systems, image compression, speech-to-text processing. The behaviour of such an automaton is a mapping, called a formal power series, assigning to each word a weight in some semiring. We generalize Büchi’s and Elgot’s fundamental theorems to this quantitative setting. We introduce a weighted ve...

متن کامل

Pattern - Matching Problems for

The power of weighted nite automata to describe very complex images was widely studied, see [5, 6, 7]. Finite automata can be also used as an e ective tool for compression of twodimensional images. There are some software packages using this type of compression, see [12, 6]. We consider the complexity of some pattern-matching problems for two-dimensional images which are highly compressed using...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2004