The problem due to differential terrain illumination on satellite imagery is experienced by most of areas which are on mountainous terrain. This may cause variations in reflectance of similar ground features which lead to a misclassification of land cover classes due to different topographic positions. This phenomenon most commonly occurred in the areas which are located on southern and norther...

This paper presents a new approach for automatic image color correction, based on statistical learning. The method both parameterizes color independently of illumination and corrects color for changes of illumination. This is useful in many image processing applications, such as image segmentation or background subtraction. The motivation for using a learning approach is to deal with changes of...

Cervical Cancer is one of the ubiquitous forms of cancer afflicting the female population worldwide. A Colposcope is a self-illuminated microscope which acquires the image of the affected cervix and the image is known as a cervigram. The raw cervigram is preprocessed by removing the specular reflections and then the region of interest is sought. Before the image is made ready for implementing f...

The correction of non-uniform illumination and the elimination of shading artifacts is an important preprocessing task used in a great number of image processing applications such as segmentation, registration or quantitative analysis. Although, a careful and accurate set up of the image acquisition system may degrade the importance of a brightness normalization algorithm, non-uniform illuminat...

Computer vision based projector-camera calibration approaches usually involve with complex geometry transformation and trivial operations, mostly inappropriate for scenarios that under poor illumination or interfering background. An automatic geometric correction method for projector using projection board embedded with optic sensors is proposed, aiming at simplifying the calibration operations...

This article proposes a solution to automatic color correction between two images/videos based on region correspondences. It starts with image segmentation by marker-controlled watershed transformation, which is faster and produces more uniform regions with better adherence to object boundaries than the segmentation in previous color correction approaches. Then, regions between two images are m...

Enhancing the quality of two dimensional signals is one of the most important factors in the fields of video surveillance and computer vision. Usually in real-life video surveillance, false detection occurs due to the presence of random noise, illumination and shadow artifacts. The detection methods based on background subtraction faces several problems in accurately detecting objects in realis...

Image enhancement is used to improve the visual effects and the clarity of image or to make the original image more beneficial for computer to process. Uneven illumination always affects image quality serious in practice. To weaken illumination effect on image quality, local gamma correction with adaptive threshold is used to improve the visual appearance of the image or to provide better trans...