This paper presents a new approach for contrast enhancement of spinal cord medical images based on multirate scheme incorporated into multiscale retinex algorithm. The proposed work here uses HSV color space, since HSV color space separates color details from intensity. The enhancement of medical image is achieved by downsampling the original image into five versions, namely, tiny, small, mediu...

There is noise interference in low-illumination images, which makes it difficult to extract weak signals. For this reason, paper proposes a image signal enhancement algorithm based on neural network. Multi-scale normalization performed low-light and multi-scale Retinex used enhance signals images. On basis, the GAN artificial network detect of image, completed residual network, self-encoding pa...

Low-light image enhancement (LLIE) is a method of improving the visual quality images captured in weak illumination conditions. In such conditions, tend to be noisy, hazy, and have low contrast, making them difficult distinguish details. LLIE techniques many practical applications various fields, including surveillance, astronomy, medical imaging, consumer photography. The total variational sou...

Inspired by retinex theory, we propose a novel method for selecting key points from a depth map of a 3D freeform shape; we also use these key points as a basis for shape registration. To find key points, first, depths are transformed using the Hotelling method and normalized to reduce their dependence on a particular viewpoint. Adaptive smoothing is then applied using weights which decrease wit...

In this paper we propose a method to speed up Retinex-type algorithms, consisting of a computationally intensive nonlinear illumination estimation module followed by a relatively simple manipulation module. Speed up is obtained by way of computing the illumination on a sub-sampled image. The challenge is to interpolate a piece-wise smooth low resolution image. We present and analyze the trade o...

The history of the spatial aspect of color perception is reviewed in order to lay a foundation for the discussion of retinex image processing. While retinex computations were originally conceived as a model for color constancy in human vision, the impact on local contrast and lightness is even more pronounced than the compensation for changes in the spectral distribution of scene illuminants. I...

this study is aimed at comparing life expectancy, resilience and differentiation between adolescents of single-child and multi-child families living in khorramabad, iran. this is a causal-comparative study and the statistical population consisted of all the male and female adolescent students in the middle and high schools of khorramabad in the academic year 2015-2016. the sample included 150 s...

If color appearance is to be a useful feature in identifying an object, then color appearance must remain roughly constant when the object is viewed in different contexts. People maintain approximate color constancy despite variation in the color of nearby objects and despite variation in the spectral power distribution of the ambient light. Land's retinex algorithm is a model of human color co...