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[fingerprint] a problem using hong_enhancement_7_31_2005

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t43

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compute_coherence(d)

Hi,

I'm using "hong_enhancement_7_31_2005", which implements Hong et al.'s enhancement scheme based on Gabor Filtering by sharat.

However, each time i call the hong_enhancement function, there displays many warnings.

>> hong_enhancement (img);
Warning: Divide by zero.
> In otsu_threshold at 30
In segment_print at 28
In hong_enhancement at 27
Error in ==> inline.feval at 8
INLINE_OBJ_ = varargin{1};

Error in ==> blkproc at 100
firstBlock = feval(fun,x,params{:});

Error in ==> hong_enhancement>blk_orientation_image at 93
gblk = blkproc(g.^2,[N N],inline('sum(sum(x))'));

Error in ==> hong_enhancement at 38
oimg = blk_orientation_image(img,N);
Click to expand...

Can anybody kindly help me to solve the problem?

Thanks & Regards,

Tony
 

fft_enhance_cubs.m

for someone to help you you needd to provide more info:
The matlab source code;
The image you're calling with the m file;
The general algoritham (not needed for debuging);
Your Matlab version;
;)

Added after 54 seconds:

by matlab source code I mean the content of the m file hong_enhancement
 

blk_orientation_image

III said:
for someone to help you you needd to provide more info:
The matlab source code;
The image you're calling with the m file;
The general algoritham (not needed for debuging);
Your Matlab version;
;)

Added after 54 seconds:

by matlab source code I mean the content of the m file hong_enhancement
Click to expand...

Thanks,III.

I'm using MATLAB 7.01 SP1.

The general alorithm should be to implmenti "Fingerprint Image Enhancement: Algorithm and Performance Evaluation" (Lin Hong, 1998).

The source code can downloaded from vijaytanjore's post a few threads below.

the list of source files:
Code: 
2005-06-30  00:41           166,272 1_1.tif
2005-06-30  00:41           166,272 1_2.tif
2005-07-09  15:26            98,488 angular_filters_pi_2.mat
2005-07-09  15:26            98,488 angular_filters_pi_4.mat
2005-06-30  00:41             2,774 angular_filter_bank.m
2005-07-15  22:23               414 complex_gradient.m
2005-07-17  20:19             1,115 compute_coherence.m
2005-07-31  00:53             1,019 compute_region_mask.m
2005-07-17  20:21             1,070 compute_region_mask.m.bak
2005-07-31  00:53            11,678 fft_enhance_cubs.m
2005-07-17  20:28            11,175 fft_enhance_cubs.m.bak
2005-07-16  16:27               574 gabor_kernel.m
2007-02-27  14:19            10,826 hong_enhancement.asv
2007-02-27  14:36            10,838 hong_enhancement.m
2005-07-17  20:29            10,509 hong_enhancement.m.bak
2005-07-17  20:29               278 imscale.m
2007-02-28  13:13                 0 list.txt
2007-02-27  02:12             2,429 normalise.m
2005-06-30  00:41             2,394 orientation_image_rao.m
2005-06-30  00:41             1,026 otsu_threshold.m
2005-07-09  17:48               841 pad_image.m
2005-07-17  20:30             2,625 pseudo_matched_filter.m
2005-01-31  12:45           131,256 radial_filters.mat
2005-07-17  20:31             2,143 radial_filter_bank.m
2007-02-27  14:19             2,524 segment_print.asv
2005-07-31  00:54             2,523 segment_print.m
2005-07-17  20:33             2,522 segment_print.m.bak
2005-07-17  20:33             2,954 smoothen_frequency_image.m
2005-07-17  20:33             1,097 smoothen_orientation_image.m
2005-07-17  20:34               844 view_orientation_image.m

The image I'm calling is right the sample image including n the source package. This package should work well, however I can't manage to execute it. I'm a newbie to fingerprint recognition. Anybody kindly help me to configure it?

thanks.
 
segment_print.m

Well I know matlab and noting about fingerprint recognition :(
but from your previous post I'd recommended you look at this m file:
blk_orientation_image.m

Added after 9 minutes:

and see what kind of input parameters it takes.
check your images do they contain a color map? What kind of format are they in: logical, double, uint8 etc.
I believe that the bug is in the images
 

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    t43

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