Color topographic display apparatus for generating hue and brightness correlated color topographic displays of a body region, the electrical activity of the brain, for example. A matrix generator defines appropriately placed elements in a matrix, each of which represents a normalized data intensity value of the ensemble. All remaining elements of the matrix are determined by interpolation of the defined elements of the matrix. A color coder associates a color with each element of the interpolated matrix. A color coder generates color coded matrices of elements. A color represented by each element of each color coded matrix is representative of the data intensity value. The colors are selected from a sequence of colors from a color space having continuous hues and monotonically varying brightness. The matrices are displayed as topographic maps of the brain by a color display. In one preferred embodiment, the lowest data intensity value is represented by a color having a blue hue and low brightness. The highest data intensity value is represented by a white hue having a high brightness. Intermediate data intensity values are represented by colors having purple, red, orange, and yellow hues in order of increasing brightness.
HUE AND BRIGHTNESS CORRELATED COLOR TOPOGRAPHIC DISPLAY APPARATUS