Gradient is an option for FindMinimum and related functions that specifies the gradient vector to assume for the function being extremized.
ImageCapture[] opens a graphical user interface for capturing images from connected cameras.
ImageChannels[image] gives the number of channels present in the data for the Image object image.
ImageResolution is an option for Export, Rasterize, and related functions that specifies at what resolution bitmap images should be rendered.
ImageSizeMultipliers is an option that specifies how much smaller to render graphics that appear within other constructs.
ImageType[image] gives the underlying type of values used for each pixel element in the Image object image.
KalmanEstimator[ss, {w, v}] constructs the Kalman estimator for the StateSpaceModel object ss with process and measurement noise covariance matrices w and v. ...
KuwaharaFilter[image, r] computes for each pixel p in image the variance of the values in the four (r + 1)*(r + 1) squares that have p as a corner, and replaces p with the ...
LinkObject["name", n_1, n_2] is an object that represents an active MathLink connection for functions such as LinkRead and LinkWrite.
Links
(Built-in Mathematica Symbol) Links[] gives a list of all MathLink connections that are currently open. Links[patt] lists only links whose names match the specified string pattern.