Chop[expr] replaces approximate real numbers in expr that are close to zero by the exact integer 0.

Threshold[data] thresholds data by replacing values close to zero by zero.Threshold[data, tspec] thresholds data using threshold specification tspec.Threshold[image, ...] ...

Matrix inversion. Here is a simple 2×2 matrix. This gives the inverse of m. In producing this formula, Mathematica implicitly assumes that the determinant ad-bc is nonzero.

Mathematica's symbolic architecture makes it possible to treat images just like any other form of expression—applying functions to them, displaying and inputting them in ...

As discussed in "Exact and Approximate Results", Mathematica can handle approximate real numbers with any number of digits. In general, the precision of an approximate real ...

ImagePartition[image, s] partitions an image into an array of s*s-pixel subimages.ImagePartition[image, {w, h}] partitions an image into an array of subimages of pixel width ...

Throughout Mathematica there is support not only for approximate real numbers, but also for exact numbers represented in algebraic or symbolic form. Functions like Floor, ...

Mathematica has sophisticated built-in automatic numerical precision and accuracy control. But for special-purpose optimization of numerical computations, or for studying ...

Clip[x] gives x clipped to be between -1 and +1. Clip[x, {min, max}] gives x for min <= x <= max, min for x < min and max for x > max. Clip[x, {min, max}, {v_min, v_max}] ...

NResidue[expr, {z, z_0}] numerically finds the residue of expr near the point z = z_0.