Problem reading the Gray Image - Image quality

[Jithender Reddy]

Hi,

I'm trying to read a gray image using imread, but the image quality is not good. The same commands works well in the freemat and the quality is good.

Please find the screen shot attached.

I'm using the Octave version 3.6.1

I'm using the command as 

1) reading from the .bmp file directly

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x = imread('d:\lena512.bmp');

figure(2), image(x), colormap(gray)

2) reading from the text file where I have the gray image matrix

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x = dlmread('d:\Lena512_BMP_Matrix.txt', '', 0, 0);

figure(2), image(x), colormap(gray)

The quality of the image from those two forms is same as below.

 

Please help me to correct this.

Thanks in advance.

Thanks,

Jithender