Count and Label DNA strands

This is a proof of concept (POC) developed using Python3, NumPy and OpenCV, to count and label the number of DNA strands from an image of combed DNA molecules.

The technique of Adaptive Mean Thresholding is used here.

Sample DNA Image

Image after thresholding

Label and Length values will be printed in CSV format on the console window. Alternatively, these can be written to a file.

Sample CSV output

number,length
1,138.23758959770203
2,61.25483310222626
3,241.4335446357727
4,68.35533821582794
5,33.21320295333862
6,73.98275470733643
7,41.627416491508484
8,22.14213538169861
9,44.52691173553467
10,25.727921843528748
11,37.041630029678345
12,24.242640614509583
13,30.38477599620819
14,25.899494767189026
15,25.727921843528748
16,75.91168713569641
17,227.63455522060394
18,33.45584309101105
19,323.102591753006
20,33.79898941516876
21,331.119837641716
22,162.2375875711441
23,40.041630268096924
24,386.52899849414825
25,152.7228683233261
26,54.84061932563782
27,38.455843806266785
28,102.91168713569641

Labeled DNA Image

Next steps:

• Length values are in pixels. They need to be converted to the scientific length unit.
• Save Label and Length values to a file or database.