GNU Octave - Local Sector 7 web page

292 GNU OctaveIf zoom is omitted, a comfortable size is chosen. If limits = [lo, hi] are given, thenthat range maps into the full range of the colormap rather than the minimum andmaximum values of A.The axis values corresponding to the matrix elements are specified in x and y, eitheras pairs giving the minimum and maximum values for the respective axes, or as valuesfor each row and column of the matrix A. At present they are ignored.imshow (i)imshow (x, map)imshow (i, n)imshow (r, g, b)Display an image.Function FileFunction FileFunction FileFunction Fileimshow (x) displays an image x. The numerical class of the image determines itsbit-depth: 1 for logical, 8 for uint8 and logical, and 16 for double or uint16.If x has dimensions MxNx3, the three matrices represent the red, green and bluecomponents of the image.imshow (x, map) displays an indexed image using the specified colormap.imshow (i, n) displays a gray scale intensity image of N levels.imshow (r, g, b) displays an RGB image.The character string "truesize" can always be used as an optional final argumentto prevent automatic zooming of the image.ind2gray (x, map)Function FileConvert an Octave indexed image to a gray scale intensity image. If map is omitted,the current colormap is used to determine the intensities.[r, g, b] = ind2rgb (x, map)Function FileConvert an indexed image to red, green, and blue color components. If map is omitted,the current colormap is used for the conversion.[x, map] = loadimage (file)Function FileLoad an image file and it’s associated color map from the specified file. The imagemust be stored in Octave’s image format.rgb2ntsc (rgb)Image format conversion.Function Filentsc2rgb (yiq)Image format conversion.Function Filergb map = hsv2rgb (hsv map)Transform a colormap from the hsv space to the rgb space.Function File