Histogram Equalization in OpenCV
What is an Image Histogram It is a graphical representation of the intensity distribution of an image. It quantifies the number of pixels for each intensity value considered. What is Histogram Equalization It is...
Category: Image Contrast Enhancement Methods
Image Contrast Enhancement Methods
Contrast stretching
One of the simplest piecewise linear functions is a contrast-stretching transformation. Low-contrast images can result from poor illumination, lack of dynamic range in the imaging sensor, or even wrong setting of a lens aperture...
Local enhancement using histogram statistics
This method is used to enhance details over small areas in an image. The procedure is to define a square or rectangular neighborhood and move the center of this area from pixel to pixel....
Histogram equalization
This method usually increases the global contrast of images, especially when the usable data of the image is represented by close contrast values. Through this adjustment, the intensities can be better distributed on the...
Power Law transformation
The general form of Power Law transformation is : s = c * r Ɣ Where c,Ɣ positive constants power-law curves with fractional values of Ɣ map a narrow range of dark input values...
MATLAB Classes
There are many different data types, or classes, that you can work with in the MATLAB® software. You can build matrices and arrays of floating-point and integer data, characters and strings, and logical true...
Contrast enhancement using Logarithmic transformation
The general for m is : S = C * LOG( 1+R ) where S is the output value R is the input value C is a constant This transformation maps a narrow range...
Contrast (Images)
Contrast is the difference in visual properties that makes an object (or its representation in an image) distinguishable from other objects and the background. In visual perception of the real world, contrast is determined...