3results about How to "High quality image" patented technology

The embodiment of the present disclosure provides an image restoration method based on a text-guided and detail-preserving diffusion model, which belongs to the technical field of image processing, and specifically comprises the following steps: obtaining a preliminary degraded image according to a clear image, encoding the clear image into a latent space through an encoder and adding noise to obtain a noise latent variable; inputting the preliminary degraded image and the noise latent variable into a conditional diffusion model as conditions to predict noise added in the t-th step, calculating a latent variable that preserves details and clarity, and decoding a new degraded image through a decoder according to the latent variable; inputting the new degraded image and the noise latent variable into the conditional diffusion model as conditions again to obtain a final predicted noise, and calculating a loss according to the final predicted noise and a preliminary predicted noise to train the conditional diffusion model; saving the model weight of the trained conditional diffusion model, and completing the image restoration process of a target image by using the inference process of DDIM. Through the scheme of the present disclosure, the restoration efficiency and adaptability are improved.

The present invention discloses a short-focus projection lens and a projection imaging system, the short-focus projection lens comprising: a lens assembly, the lens assembly comprising a plurality of spherical lenses arranged on the same optical axis, for projecting an external input light beam; the spherical lens comprises a first meniscus lens, a first biconvex lens, a biconcave lens, a second biconvex lens and a second meniscus lens arranged in sequence. The short-focus projection lens provided by the embodiment of the present invention can project an external input light beam by selecting a plurality of coaxially arranged lenses, and the plurality of lenses are all spherical lenses, which can avoid the use of aspherical lenses, and solve the technical problem of the difficulty and high cost of processing the aspherical lenses used in the prior art. In addition, the short-focus projection lens provided by the embodiment of the present invention can use only five lenses, which reduces the number of lenses compared to the lenses in the prior art, and reduces the difficulty of the production and assembly process.

The present invention discloses a coaxial multi-band reflective derotation optical system, which comprises: a scanning component; an imaging component, the imaging component and the scanning component are arranged at intervals along a first direction; a reflecting component, the reflecting component is rotatably arranged between the scanning component and the imaging component; the light is incident on the reflecting component after passing through the scanning component, and the light is incident on the imaging component after being reflected multiple times in the reflecting component. By adopting the present invention, the reflecting component is used to reflect the light multiple times to realize the derotation function, which not only makes the derotation optical system suitable for multi-band light, but also ensures the optical performance and high-quality image quality of the derotation optical system.