{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:28:29Z","timestamp":1760243309758,"version":"build-2065373602"},"reference-count":26,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2014,9,5]],"date-time":"2014-09-05T00:00:00Z","timestamp":1409875200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Algorithms"],"abstract":"<jats:p>Contrast enhancement plays a fundamental role in image processing. Many histogram-based techniques are widely used for contrast enhancement of given images, due to their simple function and effectiveness. However, the conventional histogram equalization (HE) methods result in excessive contrast enhancement, which causes natural looking and satisfactory results for a variety of low contrast images. To solve such problems, a novel multi-histogram equalization technique is proposed to enhance the contrast of the palm bone X-ray radiographs in this paper. For images, the mean-variance analysis method is employed to partition the histogram of the original grey scale image into multiple sub-histograms. These histograms are independently equalized. By using this mean-variance partition method, a proposed multi-histogram equalization technique is employed to achieve the contrast enhancement of the palm bone X-ray radiographs. Experimental results show that the multi-histogram equalization technique achieves a lower average absolute mean brightness error (AMBE) value. The multi-histogram equalization technique simultaneously preserved the mean brightness and enhanced the local contrast of the original image.<\/jats:p>","DOI":"10.3390\/a7030444","type":"journal-article","created":{"date-parts":[[2014,9,8]],"date-time":"2014-09-08T03:35:44Z","timestamp":1410147344000},"page":"444-455","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Novel Contrast Enhancement Technique on Palm Bone Images"],"prefix":"10.3390","volume":"7","author":[{"given":"Yung-Tsang","family":"Chang","sequence":"first","affiliation":[{"name":"Department of Information Networking Technology, Hsiuping University of Science and Technology, No. 11, Gongye Rd, Dali Dist., Taichung 412, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jen-Tse","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Information Management, Hsiuping University of Science and Technology, No. 11, Gongye Rd, Dali Dist., Taichung 412, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wang-Hsai","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Information Networking Technology, Hsiuping University of Science and Technology, No. 11, Gongye Rd, Dali Dist., Taichung 412, Taiwan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2014,9,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"215","DOI":"10.1016\/0952-1976(92)90005-5","article-title":"A neural architecture applied to the enhancement of noisy binary image","volume":"5","author":"Shin","year":"1992","journal-title":"Eng. Appl. Artif. Intel."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"511","DOI":"10.1109\/TIP.2006.887736","article-title":"Correction of simple contrast loss in color images","volume":"16","author":"Oakley","year":"2007","journal-title":"IEEE Trans. Image Process."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1016\/j.engappai.2009.09.003","article-title":"Adaptive typhoon cloud image enhancement using genetic algorithm and non-linear gain operation in undecimated wavelet domain","volume":"23","author":"Zhang","year":"2010","journal-title":"Eng. Appl. Artif. Intel."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"503","DOI":"10.1109\/TIP.2006.888339","article-title":"Detection of gait characteristics for scene registration in video surveillance system","volume":"16","author":"Havasi","year":"2007","journal-title":"IEEE Trans. Image Process."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Chen, C.Y., Lin, T.M., and Wolf, W.H. (2008). A visible\/infrared fusion algorithm for distributed smart cameras. IEEE J. Sel. Top. Signal Process., 514\u2013525.","DOI":"10.1109\/JSTSP.2008.2001309"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"235","DOI":"10.1016\/j.clinimag.2004.11.024","article-title":"Classification of breast ultrasound images using fractal feature","volume":"29","author":"Chen","year":"2005","journal-title":"Clin. Imaging"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"645","DOI":"10.1109\/TMI.2003.812262","article-title":"Blood pool contrast-enhanced MRA: improved arterial visualization in the steady state","volume":"22","author":"Bemmel","year":"2003","journal-title":"IEEE Trans. Med. Imaging"},{"key":"ref_8","unstructured":"Gonzalez, R.C., and Woods, R.E. (2002). Digital Image Processing, Prentice Hall. [2nd ed.]."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"593","DOI":"10.1109\/TCE.2007.381734","article-title":"A dynamic histogram equalization for image contrast enhancement","volume":"53","author":"Kabir","year":"2007","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2303","DOI":"10.1109\/TIP.2006.875201","article-title":"Graylevel grouping (GLG): An automatic method for optimized image contrast enhancement-part. ii: the variations","volume":"15","author":"Chen","year":"2006","journal-title":"IEEE Trans. Image Process."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"475","DOI":"10.1109\/76.915354","article-title":"An advanced contrast enhancement using partially overlapped sub-block histogram equalization","volume":"11","author":"Kim","year":"2001","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"966","DOI":"10.1109\/TCE.2006.1706495","article-title":"CMBFHE: A novel contrast enhancement technique based on cascaded multistep binomial filtering histogram equalization","volume":"52","author":"Lamberti","year":"2006","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_13","unstructured":"Umbaugh, S.E. (1998). Computer Vision and Image Processing, Prentice Hall."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1109\/30.580378","article-title":"Contrast enhancement using brightness preserving Bi-Histogram equalization","volume":"43","author":"Kim","year":"1997","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"68","DOI":"10.1109\/30.754419","article-title":"Image enhancement based on equal area dualistic sub-image histogram equalization method","volume":"45","author":"Wang","year":"1999","journal-title":"IEEE Trans. on Consum. Electron."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1310","DOI":"10.1109\/TCE.2003.1261234","article-title":"Minimum mean brightness error bi-histogram equalization in contrast enhancement","volume":"49","author":"Chen","year":"2003","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1326","DOI":"10.1109\/TCE.2005.1561863","article-title":"Brightness preserving histogram equalization with maximum entropy: A variational perspective","volume":"51","author":"Wang","year":"2005","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1186","DOI":"10.1109\/TCE.2007.4341603","article-title":"Multi-histogram equalization methods for contrast enhancement and brightness preserving","volume":"53","author":"Menotti","year":"2007","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1962","DOI":"10.1109\/TCE.2008.4711259","article-title":"Color image enhancement using brightness preserving dynamic histogram equalization","volume":"54","author":"Kong","year":"2008","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1981","DOI":"10.1109\/TCE.2008.4711262","article-title":"A contrast enhancement method using dynamic range separate histogram equalization","volume":"54","author":"Park","year":"2008","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1803","DOI":"10.1109\/TCE.2008.4711238","article-title":"Adaptive contrast enhancement using gain-controllable clipped histogram equalization","volume":"54","author":"Kim","year":"2008","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1301","DOI":"10.1109\/TCE.2003.1261233","article-title":"Contrast enhancement using recursive mean separate histogram equalization for scalable brightness preservation","volume":"49","author":"Chen","year":"2003","journal-title":"IEEE Trans.Consum. Electron."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1209","DOI":"10.1016\/j.patrec.2007.02.003","article-title":"Recursive sub-image histogram equalization applied to gray scale images","volume":"28","author":"Sim","year":"2007","journal-title":"Pattern Recognit. Letters"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"593","DOI":"10.1109\/TCE.2007.381734","article-title":"A dynamic histogram equalization for image contrast enhancement","volume":"53","author":"Kabir","year":"2007","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1752","DOI":"10.1109\/TCE.2007.4429280","article-title":"Brightness preserving dynamic histogram equalization for image contrast enhancement","volume":"53","author":"Ibrahim","year":"2007","journal-title":"IEEE Trans. Consum. Electron."},{"key":"ref_26","first-page":"137","article-title":"Survey of contrast enhancement techniques based on histogram equalization","volume":"2","author":"Manpreet","year":"2011","journal-title":"Int. J. Adv. Comput. Sci. Appl."}],"container-title":["Algorithms"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1999-4893\/7\/3\/444\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T21:15:40Z","timestamp":1760217340000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1999-4893\/7\/3\/444"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,9,5]]},"references-count":26,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2014,9]]}},"alternative-id":["a7030444"],"URL":"https:\/\/doi.org\/10.3390\/a7030444","relation":{},"ISSN":["1999-4893"],"issn-type":[{"type":"electronic","value":"1999-4893"}],"subject":[],"published":{"date-parts":[[2014,9,5]]}}}