39 results about "Image diffusion" patented technology

There is provided provide an image-forming apparatus that is capable of bringing a transfer film and a print medium into intimate contact without any gap therebetween, to thereby enhancing the quality of an image transferred from the film to the print medium. An image-forming apparatus uses a print medium, and a transfer film formed of a water-soluble resin material and having a smooth printing surface, to form a transferred image on the print medium. An image is printed on the printing surface of the transfer film, with sublimable dye ink. The printed transfer film and the print medium are overlaid such that the printing surface of the transfer film faces a transfer surface of the print medium. The printed transfer film and the print medium overlaid to each other are sandwiched and a thermal pressing process is performed on the printed transfer film and the print medium to cause the image printed on the transfer film to be diffused and fixed on the transfer surface. At this time, a pressure heating roller performs pressure rolling on the printed transfer film and the print medium overlaid to each other, from a non-printing surface side of the transfer film. Alternatively, a pair of pressure heating rollers sandwich the printed transfer film and the print medium overlaid to each other therebetween, and send them forward by rotation thereof.

Inhomogeneous tissue structures cause spatial-varying water molecule diffusion that is characterized by the spatial derivative of diffusivity, i.e., diffusion gradient. In a magnetic resonance imaging (MRI) system, the effects of diffusion and diffusion gradient are simultaneously encoded in an echo signal using diffusion-encoding magnetic field gradient pulses. A method for imaging the diffusion gradient of water molecules in tissues and for delineating the interface between two tissues having different diffusion properties is disclosed. The method also describes imaging diffusion anisotropy and diffusion gradient simultaneously without any additional scans in comparison with diffusion tensor MRI.

Disclosed are an electrochromic device and a method for fabricating the same. The electrochromic device comprises a transparent electrode, on which an electrochromic layer is formed, a counter electrode on which a reflective layer is formed, and an electrolyte layer interposed between the transparent electrode and the counter electrode. Since the electrolyte layer is formed in only an active region of unit pixels, neither crosstalk nor image diffusion occurs and only the selected region of unit pixels is operated. Thus, the electrochromic device can realize passive matrix displays capable of representing a desired color. Furthermore, the electrochromic device can be utilized in a variety of applications including flexible displays and electrical papers.

The invention relates to an apparatus for measuring parallel of laser beam, which adopts the tested light beam, diaphragm, a convergence lens, a semi-transmitting reflector, two column lenses, two four-quadrant detectors and a computer to form the measuring apparatus; it also adopts a convergence lens a semi-transmitting reflector, two column lenses, two four-quadrant detectors to form light beam parallel detector; it does light beam parallel detecting based on image diffusion focusing error detecting. It adopts differential method to eliminate the detecting error from the incidence light off-axis. It can own any sensitivity and linear range by designing the optical system; especially be suit for detecting the light caliber with high quality, and the laser beam with small diffusing angle and rotational symmetry.

The present invention provides an image encryption method based on chaotic mapping and chaotic S-box substitution in the technical field of image encryption, including: step S10, obtaining a color image file and performing hash calculation to obtain a hash value, based on the hash value calculation system Parameters; Step S20, generating four initial values ​​of the four-dimensional hyperchaotic map based on the hash value, and then obtaining four sets of chaotic pseudo-random sequences; Step S30, extracting sequences based on the chaotic pseudo-random sequences and system parameters W z , using the sequence W z And use the S box of AES algorithm to generate chaotic S box; Step S40, carry out Arno l d scrambling to color image file to obtain scrambling image, utilize chaotic S box to carry out byte substitution to scrambling image and obtain replacement image; Step S50, Using chaotic pseudo-random sequence and system parameters, image diffusion encryption is performed on the three components of RGB in the substitution image to obtain three ciphertext data, and the encrypted image is obtained based on each ciphertext data. The invention has the advantages of greatly improving the security of image encryption.

The invention belongs to the field of image processing, and provides a spatial domain multi-image encryption algorithm based on a chaotic system, which comprises a bit-level multi-image scrambling mode and a multi-image diffusion mode. In the algorithm, pixel points in one image can be dispersed into different images after being scrambled, and tiny variation in a plaintext image can be diffused into all the images. The algorithm can achieve high safety in histogram analysis, correlation coefficient analysis and information entropy analysis, is simple in structure, high in encryption efficiencyand easy to implement, and can be applied to the fields of business, electronic government affairs, personal affairs and the like.

The present invention relates to a glass plate including a first main surface subjected to antiglare treatment, and a second main surface opposed to the first main surface, in which a clarity index value T, a reflection image diffusiveness index value R and an anti-sparkle index value S satisfy respective relations of: clarity index value T≥0.8; reflection image diffusiveness index value R≥0.01; and anti-sparkle index value S≥0.85; and a transmission haze measured by a method according to JIS K 7136 (2000) being 15% or less. The glass plate of the present invention is excellent in clarity, reflection image diffusiveness and anti-sparkle, and also excellent in reproducibility of color.