Some characteristics were used in image segmentation algorithms, however, these algorithms have some inevitable limitations, so appropriate methods were selected for a variety of practical applications against specific demands of various applications. The improved Otsu algorithm was studied in this article, and in the cluster-based image segmentation algorithm, fuzzy C-means algorithm and globa...

Wavelet transform is an effective method of image fusion. But the decomposition level is an important factor which affects the image fusion effect and computing complexity. By using some evaluation methods of image fusion, such as entropy, standard deviation, mutual information, and quality measure methods was proposed by Wang & Bovik and Xing. Evaluation of image fusion was implemented with di...

Usually in the field of image quality assessment the terms “automatic” and “subjective” are often incompatible. In fact, when it comes to image quality assessment, we have mostly two kinds of evaluation techniques: subjective evaluation and objective evaluation. Only objective evaluation techniques being automatizable, while subjective evaluation techniques are performed by a series of visual a...

Current standards for the compression of still and moving images use Discrete Cosine Transform (DCT) which represents an image as a superposition of cosine functions with different discrete frequencies. Students and engineers specializing in image and video systems engineering need to understand why DCT is necessary and to understand the influence of DCT based image compression on picture quali...

We present a novel objective image quality assessment method for image fusion based on mutual information and structural similarity. A simplified formula was deduced to compute the information amount transformed from the source images to the final fused image. With this formula we managed to resolve the overlapping information problem immediately and predigested the calculation extremely. Moreo...

abstract in this research we studied the economical effects of rainfed irrigation and 4, 8, 12 and 16 day sprinkler irrigation intervals as well as their effects on water productivity and tea quality. the study was done in fouman tea research station, northern part of iran where tea is a major crop, during growing season of 2002-2004. the results showed that during dry season of 2002 and 2003 y...

The visual quality assessment approaches and their classification are introduced. Recent developments on both image and video quality metrics, as well as several publicly available databases for both images and videos, are reviewed. Then, we conduct experiments on image and video quality databases to compare the performance of some existing state-ofthe-art visual quality metrics. It is shown th...

The problem of objective evaluation of multisensor image fusion strategies is analysed for the design of a dual infrared system. Such a system should be used to enhance the sight effectiveness in assisting a driver or a pilot in bad visibility conditions. Two no-reference indexes are used to quantify the performance of different image fusion methods. Numerical results are presented and discusse...

The objective of this work is to provide image quality evaluation for intraonly H.264/AVC High Profile (HP) standard versus JPEG2000 standard. Here, we review the structure of the two standards and the coding algorithms in the context of subjective and objective assessments. Simulations were performed on a test set of monochrome and color image. As a result of simulations, we observed that the ...