can any one tell what does step command do in this prog

i1 = imread('pears.png');

imshow(i1);

hcsc = video.ColorSpaceConverter;

hcsc.Conversion = 'RGB to intensity';

i2 = step(hcsc, i1);

pause(2);

imshow(i2);

Answer 1

[Jos (10584)]

try

help step
doc step
type step

to get more info of this function