Name

map_histogram - Calculate color distribution for image file

Synopsis

map_histogram <bmp_file>

Description

Caluculate color distribution ("histogram") for map image file. Input image should be 4- or 8-bit uncompressed palletized BMP.

The output is tab-separated list of total count and frequency for each pixel value in the image:

pixel_value rgb_value count percent

Examples

Sample output

00 00809e     85264   2.0107
01 05819f     37446   0.8830
02 66c6dd      2030   0.0479
03 8fb6bf      5162   0.1217
04 4db47f     26373   0.6219
05 e6f6ed   2208518  52.0805
06 99d6ab     64340   1.5172
07 7fc644    109877   2.5911
08 cce83a    111396   2.6269
09 ffff80    252502   5.9544
0a b3b136     35442   0.8358
0b fecc2e     99764   2.3526
0c d3b26f      3296   0.0777
0d fedaa6      7829   0.1846
0e b28665     16928   0.3992
0f fba77e     25353   0.5979
10 e36359      3477   0.0820
11 ffffff   1039382  24.5104
12 696969        20   0.0005
13 666666     19267   0.4543
14 000000     86917   2.0496