# The ImageEnhance Module

This module contains a number of classes that can be used for image enhancement.

## Example

Example: Vary the Sharpness of an Image

    import ImageEnhance

    enhancer = ImageEnhance.Sharpness(image)

    for i in range(8):
        factor = i / 4.0
        enhancer.enhance(factor).show("Sharpness %f" % factor)

Also see the enhancer.py demo program in the Scripts directory.

## Interface

All enhancement classes implement a common interface, containing a single method:

### enhance

`enhance(factor)`. Returns an enhanced image. The factor is a floating point value controlling the enhancement. Factor 1.0 always returns a copy of the original image, lower factors means less colour (brightness, contrast, etc), and higher values more. There are no restrictions on this value.

## The Color Class

The colour enhancement class is used to colour balance of an image, similar to the controls on a colour TV set. This class implements the enhancement interface as described above.

### Color (constructor)

`Color(image)`. Creates an enhancement object for adjusting colour in an image. A factor of 0.0 gives a black and white image, a factor of 1.0 gives the original image.

## The Brightness Class

The brightness enhancement class is used to control the brightness of an image.

### Brightness (constructor)

`Brightness(image)`. Creates an enhancement object for adjusting brightness in an image. A factor of 0.0 gives a black image, factor 1.0 gives the original image.

## The Contrast Class

The contrast enhancement class is used to control the contrast of an image, similar to the control on a TV set.

### Contrast (constructor)

`Contrast(image)`. Creates an enhancement object for adjusting contrast in an image. A factor of 0.0 gives an solid grey image, factor 1.0 gives the original image.

## The Sharpness Class

The sharpness enhancement class is used to control the sharpness of an image.

### Sharpness (constructor)

`Sharpness(image)`. Creates an enhancement object for adjusting sharpness in an image. The factor 0.0 gives a blurred image, 1.0 gives the original image, and a factor of 2.0 gives a sharpened image.