img2freeman

Extracts Freeman chains from thresholded image.

Usage: img2freeman [input] [output]

Allowed options are:

-h [ --help ]                  display this message
-i [ --input ] arg             image file name
-m [ --min ] arg               min image threshold value (default 128)
-M [ --max ] arg               max image threshold value (default 255)
--sort                         to sort the resulting freemanchain by 
                               decreasing size.
-s [ --minSize ] arg           minSize of the extracted freeman chain 
                               (default 0)
-c [ --contourSelect ] arg     Select contour according reference point and 
                               maximal distance:  ex. --contourSelect X Y 
                               distanceMax
-r [ --thresholdRangeMin ] arg use a range interval as threshold (from min) :
                               --thresholdRangeMin min increment max : for 
                               each possible i, it define a digital sets 
                               [min, min+((i+1)*increment)] such that 
                               min+((i+1)*increment)< max  and extract their 
                               boundary. 
-R [ --thresholdRangeMax ] arg use a range interval as threshold (from max) :
                               --thresholdRangeMax min increment max : for 
                               each possible i, it define a digital sets [ 
                               max-((i)*increment), max] such that 
                               max-((i)*increment)>min  and extract their 
                               boundary. 

Example:

$ img2freeman -i ${DGtal}/examples/samples/church.pgm -o contours.fc  

You will obtain such results:

more contours.fc
0 138 032
0 155 032
0 202 032
0 265 010122
0 268 0030100323232232
0 300 01101003223303222
0 395 012
0 398 0001012111111111110111111011222232
0 408 032
0 425 012
0 428 010323003301032330001032300030003030003003000032323033322332322332230333333322221222222223000000030000033323332323032230321233003323322300322223223032322121110011223232110012211111111112
1 131 00100032322221
1 277 103321
2 393 112330
2 288 00032221
2 296 0321
2 373 0321
3 424 1230
3 192 0321
390 767 3303000000030030333333001011033333230003323223233030303010111003303233010332332233000333000010103033030330030101110030333230301003332321233223322222123233303322332333330030330303322321211212123222332330010003222332233010033232300030111011010032323032233333303301030010033033321221222332300033212....

See also

img2freeman.cpp