An Image Sharpness Enhancement Algorithm Based on Green Function
نویسندگان
چکیده
منابع مشابه
Gradient-based Sharpness Function
Most autofocus methods are based on a sharpness function which delivers a real-valued estimate of an image quality. In this paper we study an L2−norm gradient-based sharpness function for two-dimensional images (2-D setting). Within this setting we are able to take into account the asymmetry of the optical device objective lens (astigmatism aberration). This study provides a useful extension of...
متن کاملA Sharpness Enhancement Using the CSF for HDR Image Rendering
The dynamic range of real-world scenes is broad in the natural world. The high-dynamic-range (HDR) image has pixel values that represent the whole range of real-world scenes. For the reproduction of HDR image, the images having the various exposure times are fused to one HDR image. Many HDR images were rendered by iCAM06 technique, the representative rendering algorithms. Because of the discret...
متن کاملAn AIHT based Histogram Equalization Algorithm for Image Contrast Enhancement
Histogram Equalization (HE) is an effective technique for contrast enhancement. However, the traditional HE method usually results in extreme over-enhancement, which causes the unnatural look and visual artifacts in the processed image. To solve the problem, we propose a novel Modulated Histogram Equalization (MHE) image contrast enhancement algorithm based on Adaptive Inverse Hyperbolic Tangen...
متن کاملA Generic 2d Sharpness Enhancement Algorithm for Luminance Signals
In this paper we attempt to generalize a sharpness enhancement technique for TV applications. Basically, the enhancement is accomplished by adding overshoot to luminance edges. However, the optimal amount of overshoot added for a high image quality depends on the local image statistics. For this purpose, four properties of the video signal are analysed locally by separate units and depending on...
متن کاملAdaptive particle image velocimetry based on sharpness metrics
Background: Optical distortions can significantly deteriorate the measurement accuracy in particle image velocimetry systems. Such distortions can occur at fluctuating phase boundaries during flow measurement and result from the accompanied refractive index changes. The usage of a wavefront sensor can be hindered by disturbing light reflexes or scattering. Methods: A combination of sharpness me...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Traitement du Signal
سال: 2021
ISSN: 0765-0019,1958-5608
DOI: 10.18280/ts.380231