intensityCtrl: Simple image manipulations
In karenkuang37/MyoManager: Visual analysis of skeletal muscle microscopy data

Description Usage Arguments Details Value Examples

The following function manipulates the brightness and the degree of contrast of an image.

1	intensityCtrl(img, brightness = 0, contrast = 1)

`img`	An object of Image class specific to EBImage, stored as multi- dimensional arrays containing the pixel intensities.
`brightness`	A `numeric` value containing the level of brightness to be applied to the image. Default is 0. (no increased/decreased brightness)
`contrast`	A `numeric` value (>0) containing the degree of contrast to be applied to the image. Default is 1.(no increased/decreased contrast)

As EBImage objects are stored as matrices, they can be manipulated with all R mathematical operators. This includes + to control the brightness,

to control the degree of contrast, or ^ to control the gamma correction parameter.

A Image with adjusted brightness and/or contrast.

# Example 1: decrease brightness and increase contrast
# (good for object identification)
mouse = loadImage(system.file('extdata/Mouse_01.tiff', package='MyoManager'))
mNuc = selectFrame(mouse, 3)
viewImage(mNuc)

mouse_enhanced = intensityCtrl(mNuc, -0.2, 3)
viewImage(mouse_enhanced)

# Example 2: increase brightness and decrease contrast
human =loadImage(system.file('extdata/Human_01.tiff', package='MyoManager'))
hNuc = selectFrame(human, 3)
viewImage(hNuc)

human_enhanced = intensityCtrl(hNuc, -0.2, 3)
viewImage(human_enhanced)