CIE L*a*b* value

Hi,

i tried use below code to get value of CIE LAB from RGB image. However the result show that the value exceed the limit. As i know for L component range from 0-100, A from -120 to 120 and B from -120 to 120. But from the makecform conversion, the L*a*b* value of the image is more than the range. Please advice anything wrong with the conversion. Thanks a Lot!

clear all,close all;

filename = uigetfile('*.jpg','select jpeg file'); grayImage =imread(filename);

I = imresize(grayImage, [256 356]);

labTransformation = makecform('srgb2lab'); labI = applycform(I,labTransformation);

figure,imshow(labI) impixelinfo;