調(diào)色盤操作實例-文庫吧資料
2024-08-04 01:25本頁面
【正文】 g, 2nd ed. 169。 R. E. Woods Specified PDF Obtaining Procedures 1) Obtain the transformation function T(r) using Eq. (). 2) Use Eq. () to obtain the transformation function G(z). 3) Obtain the inverse transformation function G1. 4) Obtain the output image by applying Eq. () to all the pixels in the input image. ? The result of this procedure will be an image whose gray levels, z, have the specified probability density function pz(z) Digital Image Processing, 2nd ed. 169。 R. E. Woods Some Useful PDFs of pz(z) ? ?? ??????? ?????????22m i n2m i nm i nm i nm a x2e x p)( :R a y l e i g h)(e x p)( :lE x p o n e n t i a1)( :U n i f o r m????zzzzzpzzzpzzzpzzzDigital Image Processing, 2nd ed. 169。 R. E. Woods Histogram Matching ? ?)()( t h u s,)()(l e t )()()()(1100rTGsGzrTzGsdttpzGdwwprTszzrr???????????Digital Image Processing, 2nd ed. 169。 R. E. Woods Histogram Matching (Specification) ? The histogram equalization automatically determines a transformation function that seeks to produce an output image that has a uniform histogram. ? The method used to generate a processed image that has a specified histogram is called histogram matching or histogram specification. Digital Image Processing, 2nd ed. 169。 R. E. Woods Histogram Equalization ? Automatically determines a transformation function that seeks to produce an output image that has a uniform histogram. ? When the uniform histogram is not the best approach, we may try the Histogram Matching or Histogram Specification. ? Histogram Matching allows us to specify the shape of the histogram. Digital Image Processing, 2nd ed. 169。 R. E. Woods 修正後的結(jié)果 323205433No R G B 0 0 0 0 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 7 7 7 7 Digital Image Processing, 2nd ed. 169。 R. E. Woods 調(diào)色盤操作實例 ? 假設(shè)有一 3x
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