Digital image processing using Histograms:
Histogram-Based Enhancements The histogram is a graphical representation that brings a visual impression of the distribution of data. Rather than looking just at digital numbers, which becomes difficult to understand how the pixel values are distributed against an image. But if we plot a histogram, which is easy to do, on the y-axis we get the frequency on the x-axis we get the pixel value. And once it is done, then a lot of information as also discussed in previous lectures can be gathered about a particular image. So histograms provide a basically univariate because histograms of individual bands, individual images there, that is why it is univariate. And if we want to see the histogram of 2, then it would be bivariate or multivariate or also possible. So one variable description of data, how data is distributed and that tells also how the quality of an image taken by a sensor, so that can be seen An image histogram is basically which is...