ES2242497B1 - METHOD AND DEVICE FOR MEASURING TRAINING ON PAPER USING WAVELETS. - Google Patents

METHOD AND DEVICE FOR MEASURING TRAINING ON PAPER USING WAVELETS.

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Publication number
ES2242497B1
ES2242497B1 ES200301367A ES200301367A ES2242497B1 ES 2242497 B1 ES2242497 B1 ES 2242497B1 ES 200301367 A ES200301367 A ES 200301367A ES 200301367 A ES200301367 A ES 200301367A ES 2242497 B1 ES2242497 B1 ES 2242497B1
Authority
ES
Spain
Prior art keywords
paper
wavelets
transmission
image
measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
ES200301367A
Other languages
Spanish (es)
Other versions
ES2242497A1 (en
Inventor
Josep Pladellorens Mallofre
Mouade Bouydain
Josep Francesc Colom Pastor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universitat Politecnica de Catalunya UPC
Original Assignee
Universitat Politecnica de Catalunya UPC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universitat Politecnica de Catalunya UPC filed Critical Universitat Politecnica de Catalunya UPC
Priority to ES200301367A priority Critical patent/ES2242497B1/en
Publication of ES2242497A1 publication Critical patent/ES2242497A1/en
Application granted granted Critical
Publication of ES2242497B1 publication Critical patent/ES2242497B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

La formación del papel, es decir la estructuración de las fibras, es un parámetro importante dentro del proceso de fabricación de éste. Esta invención permite diferenciar con más exactitud que mediante los métodos actuales, papeles de distinta formación. El sistema consta de caja de iluminación que tiene como objeto conseguir iluminación uniforme a través del papel que es analizado por transmisión, cámara ccd que capta la imagen del papel iluminado por transmisión y un ordenador que analiza las imágenes que provienen de la cámara, utilizando algoritmos basados en la teoría matemática de las wavelets.The formation of the paper, that is to say the structuring of the fibers, is an important parameter in the process of manufacturing it. This invention allows differentiating more accurately than by current methods, different training roles. The system consists of a lighting box that aims to achieve uniform illumination through the paper that is analyzed by transmission, ccd camera that captures the image of the paper illuminated by transmission and a computer that analyzes the images that come from the camera, using algorithms based on the mathematical theory of wavelets.

Description

Método y dispositivo para la medida de la formación en papel utilizando wavelets.Method and device for measuring the paper training using wavelets.

Sector de la técnicaTechnical sector

Óptica, Procesado de imágenes, Ingeniería papelera.Optics, Image Processing, Engineering paper bin.

Estado de la técnicaState of the art

En relación a dispositivos para la medida de la formación en papel utilizando wavelets, se desconocen patentes y publicaciones que aborden soluciones técnicas similares a las aquí presentadas.In relation to devices for measuring the paper training using wavelets, patents and publications that address technical solutions similar to those here presented.

Breve explicación de la invenciónBrief Explanation of the Invention

La formación del papel, es decir la estructuración de las fibras, es un parámetro importante dentro del proceso de fabricación de éste. Esta invención permite diferenciar con mas exactitud que mediante los métodos actuales, papeles de distinta formación. El sistema consta de caja de iluminación, cámara ccd y ordenador que utiliza un programa basado en la teoría matemática de las wavelets.The formation of the paper, that is the fiber structuring is an important parameter within the This manufacturing process. This invention allows to differentiate more accurately than by current methods, papers of different training The system consists of lighting box, camera ccd and computer that uses a theory based program Wavelet math.

Descripción del inventoDescription of the invention

El dispositivo consta de tres partesThe device consists of three parts

a) Una caja de iluminación que tiene como objeto conseguir iluminación uniforme a través del papel que es analizado por transmisióna) A lighting box whose purpose is get uniform illumination through the paper being analyzed by transmission

b) Una cámara ccd que capta la imagen del papel iluminado por transmisiónb) A ccd camera that captures the paper image illuminated by transmission

c) Un ordenador que analiza las imágenes que provienen de la cámara, utilizando algoritmos basados en las wavelets.c) A computer that analyzes the images that they come from the camera, using algorithms based on the wavelets

La caja de iluminación tiene como objetivo que la luz que salga por una de las caras sea uniforme, actúa como caja integradora, consiguiendo que la luz de una bombilla se refleje en las caras interiores y finalmente salga uniformemente distribuida. La luz atraviesa la hoja de papel llegando hasta la cámara ccd obteniéndose una imagen de la estructura interna del papel. La imagen obtenida tiene 512 X 512 pixeles.The lighting box aims to the light that comes out from one of the faces is uniform, acts as a box integrating, getting the light of a bulb to be reflected in the inner faces and finally come out evenly distributed. The light passes through the sheet of paper reaching the ccd camera obtaining an image of the internal structure of the paper. The Image obtained has 512 X 512 pixels.

La imagen es analizada utilizando algoritmos basados en la teoría de las wavelets. La imagen se descompone en función de un tipo de wavelets, las wavelets de Daubechies. Se realizan dos descomposiciones consecutivas, calculando a continuación la energía total asociada. Los resultados de la descomposición dependen directamente de la variación que se produce en la imagen en todas las direcciones. Estos resultados dan lugar al índice de wavelet.The image is analyzed using algorithms based on wavelet theory. The image is broken down into function of a type of wavelets, the wavelets of Daubechies. Be perform two consecutive decompositions, calculating at then the total associated energy. The results of the decomposition directly depend on the variation that occurs In the image in all directions. These results give rise to the wavelet index.

Los resultados obtenidos aparecen en la pantalla del ordenador.The results obtained appear on the screen of the computer.

Claims (4)

1. Método y dispositivo para la medida de la formación en papel utilizando wavelets caracterizado porque utiliza las imágenes obtenidas al pasar la luz a través del papel.1. Method and device for measuring paper formation using wavelets characterized in that it uses the images obtained by passing light through the paper. 2. Método y dispositivo para la medida de la formación en papel utilizando wavelets según reivindicación 1, caracterizado porque la luz es recogida por una cámara ccd.2. Method and device for measuring paper formation using wavelets according to claim 1, characterized in that the light is collected by a ccd camera. 3. Método y dispositivo para la medida de la formación en papel utilizando wavelets según reivindicación 1 caracterizado porque el ordenador analiza las imágenes obtenidas utilizando las wavelets.3. Method and device for measuring paper formation using wavelets according to claim 1, characterized in that the computer analyzes the images obtained using wavelets. 4. Método y dispositivo para la medida de la formación en papel utilizando wavelets según reivindicación 1 caracterizado porque permite obtener valores mas ajustados de la formación del papel.4. Method and device for measuring paper formation using wavelets according to claim 1 characterized in that it allows to obtain more adjusted values of paper formation.
ES200301367A 2003-06-03 2003-06-03 METHOD AND DEVICE FOR MEASURING TRAINING ON PAPER USING WAVELETS. Expired - Fee Related ES2242497B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES200301367A ES2242497B1 (en) 2003-06-03 2003-06-03 METHOD AND DEVICE FOR MEASURING TRAINING ON PAPER USING WAVELETS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200301367A ES2242497B1 (en) 2003-06-03 2003-06-03 METHOD AND DEVICE FOR MEASURING TRAINING ON PAPER USING WAVELETS.

Publications (2)

Publication Number Publication Date
ES2242497A1 ES2242497A1 (en) 2005-11-01
ES2242497B1 true ES2242497B1 (en) 2007-01-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
ES200301367A Expired - Fee Related ES2242497B1 (en) 2003-06-03 2003-06-03 METHOD AND DEVICE FOR MEASURING TRAINING ON PAPER USING WAVELETS.

Country Status (1)

Country Link
ES (1) ES2242497B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5815198A (en) * 1996-05-31 1998-09-29 Vachtsevanos; George J. Method and apparatus for analyzing an image to detect and identify defects
DE19650008A1 (en) * 1996-11-21 1998-05-28 Berliner Inst Fuer Optik Gmbh Method for optical image analysis for quick detection and classification of defects
US5893055A (en) * 1997-05-30 1999-04-06 Abb Industrial Systems, Inc. Two-dimensional web property variation modeling and control
DE19857896C1 (en) * 1998-12-15 2000-08-31 Siemens Ag Method and device for evaluating spectroscopic measurements on solid materials with spatially and / or temporally varying surfaces

Also Published As

Publication number Publication date
ES2242497A1 (en) 2005-11-01

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