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45results about How to "High image fidelity" patented technology

High-dynamic-range image information hiding method

The invention discloses a high-dynamic-range image information hiding method. The method is characterized by, in secret information embedding, obtaining three channel values of each pixel point in anoriginal high-dynamic-range image; then, according to each channel value of each pixel point and corresponding 5 index bits, determining an embedding significance bit of information to be embedded ineach channel value of each pixel point; embedding the information in each channel value of each pixel point to obtain a high-dynamic-range image embedded with secret information; in secret informationextraction, obtaining three channel values of each pixel point in the high-dynamic-range image embedded with the secret information; then, obtaining embedding position of information in each channelvalue embedded with the information of each pixel point; and extracting the information from each channel value embedded with the information of each pixel point to obtain a secret information sequence. The advantages are that the method can embed the secret information into the high-dynamic-range image in an OpenEXR format; and when the embedding rate is 30 bits per pixel, the image embedded withthe secret information can still keep high fidelity.
Owner:NINGBO UNIV

MEMS galvanometer laser micro-display

The invention discloses an MEMS galvanometer laser micro-display, which comprises a laser light source and a beam combining system, wherein the laser light source a green-light semiconductor laser light source, a blue-light semiconductor laser light source and a red-light semiconductor laser light source which are respectively used for emitting a green light beam, a blue light beam and a red lightbeam; and the beam combining system comprises a shaping lens group, a beam combining mechanism, an MEMS galvanometer and a control unit, the shaping lens group is at least used for shaping the greenlight beam, the blue light beam and the red light beam emitted by the laser light source, the beam combining mechanism is used for combining the shaped green light beam, blue light beam and red lightbeam into one light beam; the MEMS galvanometer is at least used for reflecting the RGB combined light beam outputted by the beam combining system, forming a parallel light beam or a convergent lightbeam and shooting the parallel light beam or convergent light beam into a display unit; and the control unit is at least used for controlling the light intensity change of the laser light source and the operating state of the MEMS galvanometer. Images formed on the MEMS galvanometer laser micro-display are high in authenticity. In addition, the MEMS galvanometer also has the advantages of small size, low energy consumption, low cost, good safety and the like.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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