Image sequence enhancement using sub-pixel displacements
نویسندگان
چکیده
Given a sequence of images taken from a moving camera, they are registered with sub-pixel accuracy in respect to translation and rotation. The sub-pixel registration enables image enhancement in respect to improved resolution and noise cleaning. Both the registration and the enhancement procedures are described. The methods are particulary useful for image sequences taken from an aircraft or satellite where images in a sequence differ mostly by translation and rotation. In these cases the process results in images that are stable, clean, and sharp.
منابع مشابه
High-Resolution Image Reconstruction with the ICM Algorithm
In this work, we consider the problem of resolution enhancement from a set of blurred and noisy lowresolution images with different sub-pixel displacements from each other. We propose a new procedure for high-resolution image reconstruction based on both the Iterated Conditional Modes (ICM) algorithm and a new approach for sub-pixel image registration. The first step is given by aligning all th...
متن کاملImage Quality Enhancement Using Pixel Wise Gamma Correction
This paper presents a new automatic image enhancement method by modifying the gamma value of its individual pixels. Most of existing gamma correction methods apply a uniform gamma value across the image. Considering the fact that gamma variation for a single image is actually nonlinear, the proposed method locally estimates the gamma values in an image using support vector machine. First, a dat...
متن کاملDisplacement monitoring of a Long-Span Arch Railway Bridge using Digital Image Correlation (DIC)
There is an escalating demand for condition monitoring enhancement of transport infrastructures worldwide. Bridges are of vital importance in transportation infrastructure and need such monitoring. In this research, a non-contact vision-based technique called Digital Image Correlation (DIC) was used to calculate the bridge displacements. A high frame rate camera with 4K capability was used for ...
متن کاملSub-pixel precision image matching for measuring surface displacements on mass movements using normalized cross-correlation
متن کامل
Image Stitching of the Computed Radiology images Using a Pixel-Based Approach
In this paper, a method for automatic stitching of radiology images based on pixel features has been presented. In this method, according to the smooth texture of radiological images and in order to increase the number of the extracted features after quality enhancement of initial radiology images, 45 degree isotropic mask is applied to each radiology image to observe the image details. After t...
متن کامل