WO2024013405A1 - Method for reducing lateral chromatic aberration on a screen by viewing through lenses, and device for said method - Google Patents
Method for reducing lateral chromatic aberration on a screen by viewing through lenses, and device for said method Download PDFInfo
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- WO2024013405A1 WO2024013405A1 PCT/ES2022/070451 ES2022070451W WO2024013405A1 WO 2024013405 A1 WO2024013405 A1 WO 2024013405A1 ES 2022070451 W ES2022070451 W ES 2022070451W WO 2024013405 A1 WO2024013405 A1 WO 2024013405A1
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- screen
- lenses
- chromatic aberration
- lateral chromatic
- viewing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
- H04N25/61—Noise processing, e.g. detecting, correcting, reducing or removing noise the noise originating only from the lens unit, e.g. flare, shading, vignetting or "cos4"
- H04N25/611—Correction of chromatic aberration
Definitions
- the present invention relates to a procedure for reducing lateral chromatic aberration on screen by viewing through lenses, and to the device and computer program for implementing said procedure.
- Transverse chromatic aberration occurs when, as a light beam passes through a diopter (a change of medium with a different refractive index), it decomposes into its base colors, generating a halo of colors around the focused images. This effect causes a blur that affects visual acuity; And not only that, but it also affects more in oblique gazes, and is variable depending on the graduation of the obliquity of the gaze and the Abbe number of the lens construction material.
- Transverse - or lateral - chromatic aberration occurs on the sides, therefore displaced from the center of the visual field, and is independent of axial chromatic aberration. It may exist even if the other aberrations have been eliminated. This aberration is greater with higher lens power, and also increases when looking away from the optical axis and outside the so-called paraxial optics (very small angles).
- the procedure for reducing lateral chromatic aberration on the screen by viewing through lenses of the invention comprises generating, in the images displayed on the screen, and through an image processor, a color shift (that is, a chromatic aberration induced lateral), of equal value but opposite direction to the lateral chromatic aberration generated by the lenses.
- a color shift that is, a chromatic aberration induced lateral
- this compensation of the lateral chromatic aberration is generated in the non-centered areas of the screen, so that the user's visual perception will be without aberration.
- the image processor will identify the different basic colors present in the image and present them laterally out of phase to a greater or lesser extent depending on the lateral aberration generated by the lens, which must be known to be compensated.
- the correction When used on screens associated with digital devices where high resolution is read and required, the correction is only induced during the correction, not affecting other objects when looking through the lenses, which normally will not require high resolution or definition.
- Viewing quality is optimized and the profitability of high-resolution digital screens is increased.
- Figure 1 Shows a schematic view in horizontal section of the transmission of a color image generated on a screen, and its passage through a lens, where its decomposition into light beams of the basic colors occurs, appreciating how each beam corresponding to each color reaches the retina in different positions, more displaced from each other the greater the laterality
- Figure 2. Shows a front view of an image on the screen under normal conditions, without offsetting basic colors.
- Figure 3. Shows a view similar to that of Figure 1, applying the induced aberration on the screen thanks to the method of the invention, so that the convergence of the light beams of the different colors of each point in that section is achieved. of the screen at the same point on the retina, compensating for the lateral chromatic aberration generated by the lens
- Figure 4.- Shows a view similar to that of Figure 2 applying the induced aberration on the screen thanks to the method of the invention.
- the procedure for reducing the lateral chromatic aberration on the screen (1) by viewing through lenses (2) of the invention comprises the generation of the images (3) displayed on the screen (1), through a data processor. images (4), of a color shift or induced lateral chromatic aberration, of equal value and in the opposite direction to the lateral chromatic aberration generated by the lenses (2).
- Figure 1 it can be seen how, after passing through the lens (2), the light beams corresponding to the basic colors (A, A', A”) of the image shown on the screen under the conditions seen in Figure 2 are out of phase, and reach the retina (100) ungrouped, generating the lateral chromatic aberration that the lens user will appreciate, while in Figure 4 you can see how the image is shown on the screen with the basic colors out of phase (B, B',. B"), so that when passing through the lens they reach the retina (100) in groups, disappearing the chromatic aberration as seen in fig. 3.
- the image processor (4) comprises a color shift degree adjuster module (40), which will allow it to be adjusted during use.
- Said adjuster module (40) can be associated with a cursor (45) for manual adjustment and/or with an identification reader (41) for automatic adjustment, for example where the identification reader (41) comprises a camera (41 a). and a QR code interpretation module (41 b) associated with the camera (41a), so that carrying the prescription and characteristics of the lens in a simple QR, the processor, thanks to an application implemented to act on the images, do an automatic adjustment.
- the invention also encompasses the program adapted to execute the procedure on any processor.
- the invention also comprises a device (10) that comprises an image processor (4), which comprises an input (42) of image or images to be processed, an identification module of basic colors (43) in the images introduced through the input (42), a displacement module (44) for the position of the pixels based on the basic colors, an adjuster module (40) associated with the displacement module (44) to determine the amplitude of the displacement in each area of the image (a displacement calculation module), and an actuation element associated with the adjuster module (14).
- the actuation element will ideally comprise a manual adjustment cursor (45) represented on the screen (1) and/or a camera (41a) and a QR code interpretation module (41b) for automatic adjustment.
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Abstract
Description
PROCEDIMIENTO PARA REDUCCIÓN DE LA ABERRACIÓN CROMÁTICA LATERAL EN PANTALLA POR VISUALIZACIÓN A TRAVÉS DE LENTES Y DISPOSITIVO PARAPROCEDURE FOR REDUCING LATERAL CHROMATIC ABERRATION ON SCREEN BY VIEWING THROUGH LENSES AND DEVICE FOR
DICHO PROCEDIMIENTO
OBJETO DE LA INVENCIÓN OBJECT OF THE INVENTION
La presente invención se refiere a un procedimiento para reducción de la aberración cromática lateral en pantalla por visualización a través de lentes, y al dispositivo y programa de ordenador para puesta en práctica de dicho procedimiento. The present invention relates to a procedure for reducing lateral chromatic aberration on screen by viewing through lenses, and to the device and computer program for implementing said procedure.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
La aberración cromática transversal se produce cuando, al pasar por un dioptrio (un cambio de medio con diferente índice de refracción) un haz luminoso, se descompone en sus colores base, generando un halo de colores alrededor de las imágenes enfocadas. Este efecto provoca un desenfoque que afecta a la agudeza visual; y no solo eso, sino que además afecta más en miradas oblicuas, y es variable en función de la graduación de la oblicuidad de la mirada y del número de Abbe del material de construcción de la lente. Transverse chromatic aberration occurs when, as a light beam passes through a diopter (a change of medium with a different refractive index), it decomposes into its base colors, generating a halo of colors around the focused images. This effect causes a blur that affects visual acuity; And not only that, but it also affects more in oblique gazes, and is variable depending on the graduation of the obliquity of the gaze and the Abbe number of the lens construction material.
La aberración cromática transversal -o lateral- tiene lugar en los laterales, desplazada por tanto del centro del campo visual, y es independiente de la aberración cromática axial. Puede existir aunque se hayan eliminado las demás aberraciones. Esta aberración es mayor a mayor potencia de la lente, y también aumenta cuando se mira desviado del eje óptico y fuera de la denominada óptica paraxial (ángulos muy pequeños). Transverse - or lateral - chromatic aberration occurs on the sides, therefore displaced from the center of the visual field, and is independent of axial chromatic aberration. It may exist even if the other aberrations have been eliminated. This aberration is greater with higher lens power, and also increases when looking away from the optical axis and outside the so-called paraxial optics (very small angles).
En la visualización de pantallas, debido a la cercanía del ojo y lente correctora a las mismas en ordenadores, dispositivos personales, etc, por norma general va a haber objetos mostrados en la pantalla desplazados de la zona paraxial, donde por tanto se va a producir la aberración cromática lateral. When viewing screens, due to the proximity of the eye and corrective lens to them in computers, personal devices, etc., as a general rule there will be objects shown on the screen displaced from the paraxial zone, where therefore it will occur. lateral chromatic aberration.
Para compensar esta aberración, en la actualidad se utilizan combinaciones de lentes de diferentes índices de refracción, pegadas entre sí, de manera que la aberración que induce el primer dioptrio es compensada por la aberración contraria que induce la otra lente. Esta configuración resulta en montajes muy pesados y difíciles de materializar, y además no es una solución técnicamente posible de realizar en todas las lentes de uso oftálmico. To compensate for this aberration, combinations of lenses are currently used. different refractive indices, glued together, so that the aberration induced by the first diopter is compensated by the opposite aberration induced by the other lens. This configuration results in very heavy mounts that are difficult to materialize, and is also not a technically possible solution to implement in all lenses for ophthalmic use.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
El procedimiento para reducción de la aberración cromática lateral en pantalla por visualización a través de lentes de la invención comprende generar, en las imágenes mostradas en la pantalla, y a través de un procesador de imágenes, un desfase de colores (esto es, una aberración cromática lateral inducida), de valor igual pero de sentido contrario a la aberración cromática lateral generada por las lentes. De este modo se genera esta compensación de la aberración cromática lateral en las zonas no centradas de la pantalla, con lo que la percepción visual del usuario será sin aberración. The procedure for reducing lateral chromatic aberration on the screen by viewing through lenses of the invention comprises generating, in the images displayed on the screen, and through an image processor, a color shift (that is, a chromatic aberration induced lateral), of equal value but opposite direction to the lateral chromatic aberration generated by the lenses. In this way, this compensation of the lateral chromatic aberration is generated in the non-centered areas of the screen, so that the user's visual perception will be without aberration.
Para ello, el procesador de imágenes, identificará los diferentes colores básicos presentes en la imagen y presentará los mismos desfasados lateralmente en mayor o menor medida en función de la aberración lateral generada por la lente, que deberá ser conocida para ser compensada. To do this, the image processor will identify the different basic colors present in the image and present them laterally out of phase to a greater or lesser extent depending on the lateral aberration generated by the lens, which must be known to be compensated.
Además, se obtienen las siguientes ventajas: In addition, the following advantages are obtained:
No se aumenta el peso en montajes de lentes, puesto que no se emplean lentes dobles.There is no increased weight in lens mounts, since double lenses are not used.
Como la aberración es variable en función de la posición de la mirada, podemos corregirla en cualquier posición de ésta. As the aberration is variable depending on the position of the gaze, we can correct it in any position of the gaze.
Al utilizarse en pantallas asociadas a dispositivos digitales en las que se lee y se precisa una alta resolución, solo se induce la corrección durante la corrección, no afectando cuando se mira a través de las lentes a otros objetos, que normalmente no precisarán alta resolución o definición. When used on screens associated with digital devices where high resolution is read and required, the correction is only induced during the correction, not affecting other objects when looking through the lenses, which normally will not require high resolution or definition.
Se optimiza la calidad de visionado y se aumenta la rentabilidad de las pantallas digitales de altas resoluciones. Viewing quality is optimized and the profitability of high-resolution digital screens is increased.
La visualización resulta más confortable y se genera menos cansancio. Viewing is more comfortable and less fatigue is generated.
La simpleza de la invención permite su implantación en cualquier pantalla con procesador de imágenes (tarjeta gráfica). corrige las aberraciones cromáticas totales, es decir la que induce la lente y otras que pudieran estar inducidas por otros factores. DESCRIPCIÓN DE LOS DIBUJOS The simplicity of the invention allows it to be implemented on any screen with an image processor (graphics card). It corrects total chromatic aberrations, that is, the one induced by the lens and others that could be induced by other factors. DESCRIPTION OF THE DRAWINGS
La figura 1.- Muestra una vista esquemática en sección horizontal de la transmisión de una imagen a color generada en una pantalla, y de su paso por una lente, donde se produce su descomposición en haces luminosos de los colores básicos, apreciando cómo cada haz correspondiente a cada color alcanza la retina en posiciones diferentes, más desplazadas entre sí a mayor lateralidad Figure 1.- Shows a schematic view in horizontal section of the transmission of a color image generated on a screen, and its passage through a lens, where its decomposition into light beams of the basic colors occurs, appreciating how each beam corresponding to each color reaches the retina in different positions, more displaced from each other the greater the laterality
La figura 2.- Muestra una vista frontal de una imagen en pantalla en condiciones normales, sin desfasar colores básicos. Figure 2.- Shows a front view of an image on the screen under normal conditions, without offsetting basic colors.
La figura 3.- Muestra una vista similar a la de la figura 1 , aplicando la aberración inducida en pantalla gracias al método de la invención, de modo que se consigue la convergencia de los haces luminosos de los diferentes colores de cada punto en esa sección de la pantalla en el mismo punto de la retina, compensando la aberración cromática lateral generada por la lente Figure 3.- Shows a view similar to that of Figure 1, applying the induced aberration on the screen thanks to the method of the invention, so that the convergence of the light beams of the different colors of each point in that section is achieved. of the screen at the same point on the retina, compensating for the lateral chromatic aberration generated by the lens
La figura 4.- Muestra una vista similar a la de la figura 2 aplicando la aberración inducida en pantalla gracias al método de la invención. Figure 4.- Shows a view similar to that of Figure 2 applying the induced aberration on the screen thanks to the method of the invention.
REALIZACIÓN PREFERENTE DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION
El procedimiento para reducción de la aberración cromática lateral en pantalla (1) por visualización a través de lentes (2) de la invención, comprende la generación en las imágenes (3) mostradas en la pantalla (1 ), a través de un procesador de imágenes (4), de un desfase de colores o aberración cromática lateral inducida, de valor igual y en sentido contrario a la aberración cromática lateral generada por las lentes (2). En la figura 1 puede verse cómo tras pasar por la lente (2), los haces luminosos correspondientes a los colores básicos (A, A’, A”) de la imagen mostrada en la pantalla en las condiciones que se aprecian en la figura 2 se desfasan, y alcanzan desagrupados a la retina (100), generando la aberración cromática lateral que apreciará el usuario de la lente, mientras que en la figura 4 puede verse cómo se muestra en la pantalla la imagen con los colores básicos desfasados (B, B’,. B”), de forma que al pasar por la lente alcanzan la retina (100) agrupados, desapareciendo la aberración cromática como se ve en la fig. 3. Además, se prefiere que el procesador de imágenes (4) comprenda un módulo ajustador (40) de grado de desfase de colores, lo que permitirá ajustar el mismo durante su utilización. Dicho módulo ajustador (40) puede estar asociado a un cursor (45) para ajuste manual y/o a un lector (41) de identificación, para ajuste automático, por ejemplo donde el lector (41) de identificación comprenda una cámara (41 a) y un módulo de interpretación (41 b) de códigos QR asociado a la cámara (41a), de forma que llevando la graduación y características de la lente en un sencillo QR, el procesador, gracias a una aplicación implementada para actuar en el procesador de imágenes, haga un ajuste automático. The procedure for reducing the lateral chromatic aberration on the screen (1) by viewing through lenses (2) of the invention, comprises the generation of the images (3) displayed on the screen (1), through a data processor. images (4), of a color shift or induced lateral chromatic aberration, of equal value and in the opposite direction to the lateral chromatic aberration generated by the lenses (2). In Figure 1 it can be seen how, after passing through the lens (2), the light beams corresponding to the basic colors (A, A', A”) of the image shown on the screen under the conditions seen in Figure 2 are out of phase, and reach the retina (100) ungrouped, generating the lateral chromatic aberration that the lens user will appreciate, while in Figure 4 you can see how the image is shown on the screen with the basic colors out of phase (B, B',. B"), so that when passing through the lens they reach the retina (100) in groups, disappearing the chromatic aberration as seen in fig. 3. Furthermore, it is preferred that the image processor (4) comprises a color shift degree adjuster module (40), which will allow it to be adjusted during use. Said adjuster module (40) can be associated with a cursor (45) for manual adjustment and/or with an identification reader (41) for automatic adjustment, for example where the identification reader (41) comprises a camera (41 a). and a QR code interpretation module (41 b) associated with the camera (41a), so that carrying the prescription and characteristics of the lens in a simple QR, the processor, thanks to an application implemented to act on the images, do an automatic adjustment.
Dado que el procedimiento se aplicará fundamentalmente mediante procesado de imágenes, con el efecto técnico de conseguir una representación de una imagen en pantalla con una aberración inducida, la invención también abarca el programa adaptado para ejecutar el procedimiento en cualquier procesador. Since the procedure will be applied fundamentally by image processing, with the technical effect of achieving a representation of an image on the screen with an induced aberration, the invention also encompasses the program adapted to execute the procedure on any processor.
La invención también comprende un dispositivo (10) que comprende un procesador de imágenes (4), el cual comprende una entrada (42) de imagen o imágenes a procesar, un módulo identificador de colores (43) básicos en las imágenes introducidas a través de la entrada (42), un módulo desplazador (44) de la posición de los píxeles en función de los colores básicos, un módulo ajustador (40) asociado al módulo desplazador (44) para determinar la amplitud del desplazamiento en cada zona de la imagen (un módulo de cálculo de los desplazamientos), y un elemento de actuación asociado al módulo ajustador (14). El elemento de actuación comprenderá idealmente un cursor (45) de ajuste manual representado en la pantalla (1) y/o una cámara (41a) y un módulo de interpretación de códigos QR (41b) para ajuste automático. The invention also comprises a device (10) that comprises an image processor (4), which comprises an input (42) of image or images to be processed, an identification module of basic colors (43) in the images introduced through the input (42), a displacement module (44) for the position of the pixels based on the basic colors, an adjuster module (40) associated with the displacement module (44) to determine the amplitude of the displacement in each area of the image (a displacement calculation module), and an actuation element associated with the adjuster module (14). The actuation element will ideally comprise a manual adjustment cursor (45) represented on the screen (1) and/or a camera (41a) and a QR code interpretation module (41b) for automatic adjustment.
Descrita suficientemente la naturaleza de la invención, se indica que la descripción de la misma y de su forma de realización preferente debe interpretarse de modo no limitativo, y que abarca la totalidad de las posibles vahantes de realización que se deduzcan del contenido de la presente memoria y de las reivindicaciones. Having sufficiently described the nature of the invention, it is indicated that the description of the same and its preferred embodiment must be interpreted in a non-limiting manner, and that it covers all the possible embodiments that can be deduced from the content of this report. and the demands.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ES2022/070451 WO2024013405A1 (en) | 2022-07-13 | 2022-07-13 | Method for reducing lateral chromatic aberration on a screen by viewing through lenses, and device for said method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ES2022/070451 WO2024013405A1 (en) | 2022-07-13 | 2022-07-13 | Method for reducing lateral chromatic aberration on a screen by viewing through lenses, and device for said method |
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| WO2024013405A1 true WO2024013405A1 (en) | 2024-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/ES2022/070451 Ceased WO2024013405A1 (en) | 2022-07-13 | 2022-07-13 | Method for reducing lateral chromatic aberration on a screen by viewing through lenses, and device for said method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012007061A1 (en) * | 2010-07-16 | 2012-01-19 | Robert Bosch Gmbh | Method for lateral chromatic aberration detection and correction |
| ES2577860A2 (en) * | 2013-03-12 | 2016-07-19 | Steven P. Lee | Computerized refraction and astigmatism determination |
| US20170302825A1 (en) * | 2016-04-18 | 2017-10-19 | Canon Kabushiki Kaisha | Image processing apparatus, image capturing apparatus, lens apparatus, image processing method, and non-transitory computer-readable storage medium |
| CN111242863A (en) * | 2020-01-09 | 2020-06-05 | 上海酷芯微电子有限公司 | Method and medium for eliminating lens lateral chromatic aberration based on image processor |
-
2022
- 2022-07-13 WO PCT/ES2022/070451 patent/WO2024013405A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012007061A1 (en) * | 2010-07-16 | 2012-01-19 | Robert Bosch Gmbh | Method for lateral chromatic aberration detection and correction |
| ES2577860A2 (en) * | 2013-03-12 | 2016-07-19 | Steven P. Lee | Computerized refraction and astigmatism determination |
| US20170302825A1 (en) * | 2016-04-18 | 2017-10-19 | Canon Kabushiki Kaisha | Image processing apparatus, image capturing apparatus, lens apparatus, image processing method, and non-transitory computer-readable storage medium |
| CN111242863A (en) * | 2020-01-09 | 2020-06-05 | 上海酷芯微电子有限公司 | Method and medium for eliminating lens lateral chromatic aberration based on image processor |
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