createImMontage (imarray, varargin)

Create a rectangular image montage or image grid from an image array

A simple function and an alternative to Matlab Image processing Toolbox's montage(). It will produce an image as a grid of frames of the input image array instead of displaying. It also provides an option to resize the input images before adding them to the grid.
% --------------------------------------------------------------------------------
% Input arguments:
% 1st arg: imarray is input array of dimensions H x W x NumImages or H x W x C x NumImages where C
% is the number of channels in each image
% 2nd arg: gridcols = Number of images to appear horizontally
% Default = 3
% 3rd arg: dsf = Down Sampling Factor (to downsample or reduce the size of the input images)
% range [0 1]. Default = 1 (no downsampling)
% 4th arg: border = Thickness of border between two images (in pixels)
% Default = 2;
% ----------------------------------------------------
% Output argument:
% imMontage = output image montage or grid
% ----------------------------------------------------
% Examples:
% imMontage = createImMontage(imarray); % automatically select grid size and populate without any
% downsampling with 2 pixels border between consecutive images (default)
%
% imMontage = createImMontage(imarray,5,0.25); % 5 images horizontally and every
% image downsampled to quarter with 2 pixels border (default) between
% consecutive images
%
% imMontage = createImMontage(imarray,7,0.5,5); % 7 images horizontally and every
% image downsampled to half with 5 pixels border between consecutive images
%
% NOTE: Input image array can be created by:
% imarray = cat(3,imgray1,imgray2,imgray3,imgray4); % for gray scale images
% imarray = cat(4,imcolor1, imcolor2, imcolor4, imcolor5); for color images