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Images Enhancemcut By using the Histogram | ||
| Journal of College of Education | ||
| Article 1, Volume 0, Issue 3, 2017, Pages 38-49 | ||
| Authors | ||
| Asmaa s; ; la Hussien; Amel H.Abbas | ||
| Abstract | ||
| An image histogram is a chartthat sho、vs the distribution ofintensities in an irnage.The irnage histogram mnction creates plot by making n equaHy spaced bins each representing a range of data values,and then calculates the ntlmber of pixels within each range. Image enhancement that moditting the value of picture elements is a classical method for iFnprOVing the visual perception .Many digital enhancement techniques have been used in order to optinlize the、 .isual quality of image for human or machine vision throtlgh llistogranl nlodi「lcations. All these rnethods try to enhance the contrast ofthe input inlage、vithout rneasuring the contrast itsel■ In this paper t、vo histogra11l nlodi「lcation methods are introduced the flrst onc(histOgram stretching)depending on the maximum and minnlum brightness value in the image,while the second onc(histOgralu equalization) depend on the re-arrange the brightness values in the image. The experimental results indicate that the images more brightness after applying the two enhancement methods and the quality of the processed images is measured subjectively | ||
| Keywords | ||
| Image Enhancement using Histogram; hnage Equalization; and Image Stretching | ||
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