HoldComplete[expr] shields expr completely from the standard Mathematica evaluation process, preventing even upvalues associated with expr from being used.
HoldFirst is an attribute which specifies that the first argument to a function is to be maintained in an unevaluated form.
Hyperfactorial[n] gives the hyperfactorial function H(n).
Hypergeometric0F1Regularized[a, z] is the regularized confluent hypergeometric function \[Null]_0 F_1 (a; z)/\[CapitalGamma](a).
Hypergeometric1F1Regularized[a, b, z] is the regularized confluent hypergeometric function \[Null]_1 F_1 (a; b; z)/\[CapitalGamma](b).
ImageAdd[image, x] adds an amount x to each channel value in image.ImageAdd[image_1, image_2] gives an image in which each pixel is the sum of the corresponding pixels in ...
ImageAdjust[image] adjusts the levels in image, rescaling them to cover the range 0 to 1.ImageAdjust[image, c] adjusts the contrast of image by an amount c.ImageAdjust[image, ...
ImageClip[image] clips all channel values in image to lie in the default range.ImageClip[image, {min, max}] clips channel values to lie in the range from min to ...
ImageConvolve[image, ker] gives the convolution of image with kernel ker.
ImageCorrelate[image, ker] gives the correlation of image with kernel ker.ImageCorrelate[image, ker, f] computes a generalized correlation in which the function f is used in ...