Abstract: The monitoring device for dye baths in which a dye component is introduced during a period of time D includes: a transparency sensor (140) for the liquid contained in the bath adapted to supply a signal representing the transparency of the bath for at least one spectral range and control elements (148) adapted to determine a reference point (315) for transparency evolution of the bath corresponding to the transparency that the bath would have had if there had been no absorption of the colorant during the period of time D. Preferentially, the reference point is determined by interpolating transparency evolution to the start of the introduction, interpolation carried out over the period of time D of the introduction of colorant into the dye bath.

Abstract: The present invention relates to a communication method that includes an operation of receiving a succession of pages originating from a first site of a computer network. That method further includes an operation of memory storage of information representative of the said succession of pages, outside the said first site and an operation of associating a certificate of integrity with the memory-stored information representative of the said succession of pages. The certificate of integrity is stored in memory in association with the information representative of the said succession of pages. The certificate of integrity makes it possible to detect any alteration to the memory-stored information representative of the said succession of pages, subsequent to its being stored in memory.

Abstract: The online transaction information backup method includes:

Abstract: The device includes a motor that move the web and an electronic camera which supplies a signal representing an image of the web formed on an image sensor having photosensitive points. The device has synchronization of the duration of a predetermined number of successive pitches of the web passing through the optical field of the camera and the duration separating the start of two successive imaging operations of the camera. Thus, an optical filtering is performed. From one image to the next, the same photosensitive point of the sensor corresponds to identical portions of threads and interstices of the web, so that any optical variation of the threads or interstice is detected. The signals representing the images produced by each photosensitive point during successive shots correspond to zones of material with similar designs.

Abstract: A device for increasing the dynamic range of a camera comprising a lens (2) which forms a picture (6) of a scene (1) on a primary electronic image sensor (3) having a first dynamic range, a second image data source (4) corresponding to one picture of said scene (1), and an electronic image processing circuit (5), which combines the data from the primary image sensor (3) and the data from the second image data source (4) and provides image data representing the scene (1) as observed and represented by said image data, with a ratio between the brightest and dimmest areas of said scene (1) which is greater than the dynamic range of a primary image sensor (3). In various embodiments, the second image data source (4) is either a secondary image sensor or a memory which stores a previously sensed image from the primary image sensor (3).

Abstract: A device for detecting defects (2, 3) in fibrous materials (4, 22) includes members (16, 17) for squeezing the material against a film (1), a separating member (24) downstream of the squeezing members for separating the fibrous material from the film, and an opto-electronic sensor (6) downstream of the separating member for imaging the film and defects. An image processing assembly (26, 44) is electrically connected to the output of the imaging assembly for sensing and counting the marks left on the film by the defects. A member (25) is provided for moving the film relative to the opto-electronic sensor. Various optical systems, particularly polarizers (9, 10), may be incorporated into the device.

Abstract: A non-linear device for amplifying the intensities of light rays includes a photosensitive optical component upon which a first image is formed by light rays incident upon the photosensitive optical component. A final image is formed from the rays passing through the photosensitive optical component. The photosensitive optical component includes a transparency which is variable at any point as a function of the luminous intensity reaching that point and another characteristic of the incident light. A control circuit responsive to the other characteristic is provided for controlling the operation of the optical component such that the luminous intensities of each point forming the initial image are amplified in a non-linear manner and form a final image, the contrast of the luminous intensities of which are different from those of the rays forming the initial image.

Abstract: An image processing device having at least an image sensor, a flat image transfer screen and a computer, characterized by a sensor (3) arranged as a first network of image points or pixels, an analysis device (6, 4) adapted to generate for each pixel of the sensor a signal representative of at least one parameter, and at least a flat screen (18, 20, 25) organized according to a network of image points or pixels in association with processing means (5, 9) intended to elaborate for each pixel of the screen a state control signal which is a function of the representative signals delivered by the analysis means, the sensor and the screen receiving images of same objects, these images being transmitted or reflected by the screen. The device is more particularly suited to be used in the photographic industry.