انت هنا الان : شبكة جامعة بابل > موقع الكلية > نظام التعليم الالكتروني > مشاهدة المحاضرة
الكلية كلية تكنولوجيا المعلومات
القسم قسم شبكات المعلومات
المرحلة 2
أستاذ المادة توفيق عبد الخالق عباس الاسدي
4/3/2011 8:38:58 PM
Image enhancement [ray]
When pictures are converted from one form to another by processes such as imaging, scanning, or transmitting, the quality of the output image may be inferior to that of the original input picture. There is thus a need to improve the quality of such images, so that the output image is visually more pleasing to human observers from a subjective point of view. To perform this task, it is important to increase the dynamic range of the chosen features in the image, which is essentially the process of image enhancement.
Enhancement has another purpose as well, that is to undo the degradation effects which might have been caused by the imaging system or the channel.
The growing need to develop automated systems for image interpretation necessitates that the quality of the picture to be interpreted should be free from noise and other aberrations. Thus it is important to perform preprocessing operations on the image so that the resultant preprocessed image is better suited for machine interpretation. Image enhancement thus has both a subjective and an objective role and may be viewed as a set of techniques for improving the subjective quality of an image and also for enhancing the accuracy rate in automated object detection and picture interpretation.
[pratt]
Image enhancement processes consist of a collection of techniques that seek to improve the visual appearance of an image or to convert the image to a form better suited for analysis by a human or a machine. In an image enhancement system, there is no conscious effort to improve the fidelity of a reproduced image with regard to some ideal form of the image, as is done in image restoration.
There is no general unifying theory of image enhancement at present because there is no general standard of image quality that can serve as a design criterion for an image enhancement processor.
[Anil K. Jain]
The enhancement process does not increase the inherent information content in the data, But it increase the dynamic range of the chosen features so that they can be detected easily. The greatest difficulty in image enhancement is quantifying the criterion for enhancement.
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
|