Dxo Labs

Do Labs

Vision Iq

Bruno Liege

Frederic Guichard

Jean-Marc Lavest

Jerome Meniere

Benoit Chauville

Laurent Chanas

Imene Tarchouna

Hoang-Phi Nguyen

Lionel Moisan

Martin Lefebure

Christophe Migliorini

Etienne Knauer

Regis Tessieres

Frederic Cao

Cesar Douady

Ayham Nseir

Thierry Cohignac

Fanny Rousson

Michael Kraak

Abdelmounim Belahmidi

A method and a system are described where the quality of an image can be modified, using formatted information related to the defects of the appliances of the chain of appliances. The method may include compiling directories of sources of formatted information related to the said appliances, searching automatically for this formatted information related to the appliances of the said chain of appliances, modifying the said image automatically by image-processing software or components by taking into account the formatted information. Additionally, the formatted information may be modified as a function of variable characteristics of the image to be processed and of the chain of appliances. Thus, it is possible to process the images derived from appliances that may be of diverse origins and that have been commercialized gradually over time, such as photographic or video images in optical instrumentation, industrial controls, robotics, metrology, etc.

Method and system for modifying image quality of an image

A system for capturing sequences of digital images, including a lens, a digital sensor including a plurality of light-sensitive elements, a focusing module suitable for varying the focus of the lens on the sensor, and an electronic processing unit. The electronic processing unit is suitable for determining a variation in magnification between two consecutively captured digital images from a variation in the focus of the lens, and for determining a digital compensation for said variation in magnification. The electronic processing unit is further suitable for digitally processing at least one of the consecutively captured digital images on the basis of said predetermined compensation. The system enables compensation for visual effects resulting from changes in magnification between two consecutively captured images.

Method and system for capturing sequences of images with compensation for variations in magnification

The invention relates to a method for estimating a defect in an image-capturing system (I), which produces, with regard to any first image (I), representing any scene (S), a variation in the field of a characteristic of the first image, having an order of magnitude that is statistically lower than a variation in the field of said characteristic added by the scene. The method comprises: calculating, in at least a first portion of the field of the first image, a measurement (&#x3bc;(I)) related to said characteristic of the first image, an estimative magnitude (&#x3bd;) of said defect, depending on the calculated measurement and having a variation having the same order of magnitude as the variation in the field of said characteristic of the first image produced by said defect.

Method for estimating a defect in an image-capturing system, and associated systems

A method and a system for reducing update frequency of an image processor, in particular a software and/or a component. The image processor enables modifying the quality of digital images derived from and addressed to a set of appliances. The set of appliances includes an image capture device and/or an image scanning device. The image processor uses formatted data dependent on at least one variable, associated with defects of at least one appliance of the set of appliances. The formatted data includes parameters of at least a parameterable model dependent on the variables. The formatted data enables establishing a correspondence, in particular by a correspondence table, between part of the variables and identifiers. The identifiers enable determining the value of the variable corresponding to an identifier taking into account the identifier and the image.

Method and system for reducing update frequency of image-processing means

Method of monitoring an image capture system () comprising a sensor (C) comprising a plurality of photosensitive elements (Z, Z, Z) and an optical device (L) for focusing the light emitted from a scene towards the sensor. This method comprises the obtaining () of respective responses of certain at least of the photosensitive elements (E, E', P, P) of the sensor to an exposure of the image capture system to any scene (S), followed by a determination () of at least one deviation (&#x394;) between at least one quantity (G) deduced from the responses obtained and at least one reference quantity (Gref). These steps may be followed by an estimation () of an optical effect of the image capture system () on the basis of said deviation (&#x394;) determined and optionally by an implementation of an action able to at least partially compensate () for the estimated optical defect.

Monitoring of optical defects in an image capture system

A method and a system with which the quality of an image derived from or addressed to a chain of appliances can be modified. Formatted information related to defects of the appliances is employed. The method and system: compile directories of sources of formatted information related to the said appliances, search automatically for the formatted information related to the appliances, and modify the image automatically by image-processing software and/or image-processing components by taking into account the obtained formatted information. The formatted information can be modified as a function of variable characteristics of the image to be processed and/or the appliances. With the method and system it is possible to process images derived from appliances that have diverse origins and that have been commercialized gradually over time. Such a method and system are applicable to processing of photographic or video images and in optical instrumentation, industrial controls, robotics, metrology, etc.

Method and system for modifying image quality

In order to increase the depth of field of an optical system, there is provision to add a phase object, interposed between an object (O) to be imaged and an image plane () of the optical system. The phase object is interposed although a chromatic aberration of the system is not yet corrected. After interposition, the measured optical signal is corrected complementarily so as to eliminate the chromatic aberrations therefrom. It is shown that if a parameter of the expansion of the expression, a function of pupil dependency, that the difference in path length of the optical system possesses a significant value of higher order than that of the defocus, then an increase in the depth of field is obtained.

Optical system provided with a device for augmenting its depth of field

To increase the depth of field of an optical system, an inversion of the chromatism is produced. This accommodates the fact that, in natural light, users prefer, for their photographs, taking long distance shots outdoors, where the illuminant is mostly composed of blue, and short-distance shots indoors, where the illuminant is mostly composed of red. While optical devices naturally focus the blue components at a shorter distance than the red components, which is unfavorable, with an inversion of the chromatism, a focus more in keeping with what is required is restored.

Optical system furnished with a device for increasing its depth of field

The invention concerns a method for activating a function by using a measurement taken from at least one digital image () having at least two colors () and originating from an image-capturing apparatus, the method including measuring the relative sharpness () between at least two colors in at least one region R of the image, and Controlling at least one action () depending on the measured relative sharpness.

Method for activating a function, namely an alteration of sharpness, using a colour digital image

A method for activating a function by using a measurement taken from at least one digital image having at least two colors and originating from an image-capturing apparatus, wherein a relative sharpness is measured between at least two colors on at least one region of the digital image, and at least one function is activated depending on the measured relative sharpness.

Method of controlling an action, such as a sharpness modification, using a colour digital image

A method and system with which quality of an image derived from or addressed to a chain of appliances can be modified. Formatted information related to defects of the appliances is employed. The method and system: compile directories of sources of formatted information related to the appliances, search automatically for the formatted information related to the appliances, and modify the image automatically by image-processing software and/or image-processing components by taking into account the obtained formatted information. The formatted information can be modified as a function of variable characteristics of the image to be processed and/or the appliances. With the method and system it is possible to process images derived from appliances that have diverse origins and that have been commercialized gradually over time. Such a method and system are applicable to processing of photographic or video images and in optical instrumentation, industrial controls, robotics, metrology, etc.

A method and a system for producing formatted information related to defects of appliances of a chain of appliances. To produce the formatted information related to the defects of an image-capture appliance of the chain, the method includes a first calculation algorithm with which there can be chosen, within a set of parameterizable transformation models, within a set of parameterizable reverse transformation models, within a set of synthesis images, within a set of reference scenes, and within a set of transformed images: a reference scene, and/or a transformed image, and/or a parameterizable transformation model, with which a reference image of the reference scene can be transformed to the transformed image, and/or a parameterizable reverse transformation model, with which the transformed image can be transformed to the reference image, and/or a synthesis image obtained from the reference scene and/or obtained from the reference image. The formatted information is at least partly composed of the parameters of the chosen parameterizable transformation model and/or of the parameters of the chosen parameterizable reverse transformation model.

Method and system for producing formatted information related to defects of appliances

A method and system for providing, in accordance with a standard format, formatted information to an image-processor, especially software and/or components. The formatted information is related to defects of a chain of appliances including an image-capture appliance and/or an image-restitution appliance. The image-processor uses the formatted data to modify the quality of at least one image derived from or addressed to the chain of appliances. The formatted information includes data characterizing defects of the image-capture appliance, especially distortion characteristics, and/or data characterizing defects of the image-restitution appliance, especially distortion characteristics. The method fills in at least one field of the standard format with the formatted information. This field is designated by a field name and contains at least one field value.

Method and system for providing formatted data to image processing means in accordance with a standard format

The invention concerns a method and a system for detecting a body () in a zone () located proximate an interface (). The body is illuminated by an electromagnetic radiation () comprising at least two different wavelengths, located in ranges corresponding to near infrared and to green-blue. The method comprises the following steps: selecting two wavelengths; providing, for each of said wavelengths, an image () of the interface and of the zone; extracting from said data of each image two sets of data () respectively representing at least one part of the body in the near infrared range and in the green-blue range; comparing said data sets (). It is thus possible to detect the presence of a body by discriminating between a body entirely located beneath the interface and a body located at least partly above the interface.

Method and system for detecting a body in a zone located proximate an interface

A processing system and method for producing formatted information related to appliances of an appliance chain. This appliance chain includes at least one image-capture appliance and/or at least one image-restitution appliance for capturing and/or restituting an image on a medium. The system and method produce formatted information related to geometric distortions of at least one appliance of the chain. Fixed characteristics of the appliances and/or variable characteristics depending on the image can be taken into account. The fixed characteristics and/or the variable characteristics can be associated with one or more characteristic values, especially the focal length and/or the focusing. Then, measured formatted information related to the geometric distortions of the appliance are produced from a measured field. The system and method are applicable to photographic or video image processing, in optical devices, industrial controls, robotics, metrology, etc.

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Paris, France

Frederic Guichard