#!/bin/bash
thWidth=75;
thHeight=66;
origImg=("/test/my images/img2/image1.jpg");
thumbImg=("/test/my images/img2/thumb_image1.jpg");

for((i=0;i<${#origImg[@]};i++))
do
echo ${origImg[$i]}
echo ${thumbImg[$i]}
sips "${origImg[$i]}" -Z $thWidthx$thHeight --out "${thumbImg[$i]}"
done