- Adaptive histogram equalization
Adaptive histogram equalization is a computer
image processingtechnique used to improve contrastin images. It differs from ordinary histogram equalizationin the respect that the adaptive method computes several histograms, each corresponding to a distinct section of the image, and uses them to redistribute the lightness values of the image. Ordinary histogram equalization simply uses a single histogram for an entire image.
Consequently, adaptive histogram equalization is considered an image enhancement technique capable of improving an image's "local contrast", bringing out more detail in the image. However, it also can produce significant noise. A generalization of adaptive histogram equalization called "contrast limiting adaptive histogram equalization", also known as
CLAHE, was developed to address the problem of noise amplification.
Shadow and highlight enhancement
Wikimedia Foundation. 2010.
Look at other dictionaries:
Histogram equalization — is a method in image processing of contrast adjustment using the image s histogram.OverviewThis method usually increases the local contrast of many images, especially when the usable data of the image is represented by close contrast values.… … Wikipedia
CLAHE — In Image Processing, CLAHE stands for Contrast Limited Adaptive Histogram Equalization. CLAHE is a technique used to improve the local contrast of an image. It is a generalization of adaptive histogram equalization and ordinary histogram… … Wikipedia
Shadow and highlight enhancement — refers to an image processing technique to correct exposure. Images with over and under exposed areas can be recovered with the Shadow/Highlight tool in Photoshop. Though this tool can be used to darken overexposed highlights, it is used… … Wikipedia
Comparison of image processing software — The following table provides a comparison of image processing software. Functionality Matlab* Mathematica imageJ FIJI (software) Population Extract alpha channel No … Wikipedia
List of computer vision topics — This is a list of computer vision and image processing topics Contents 1 Image enhancement 2 Transformations 3 Filtering, Fourier and wavelet transforms and image compression … Wikipedia
Chasys Draw IES — Developer(s) John Paul Chacha s Lab  Stable release 3.66.02 / 5 September 2011; 51 days ago (2011 09 05) Operating system … Wikipedia