0.0 Anomaly Score for larger dataSet-bitmap_detector

[prabhatmishra33]

Dear Team,
I am using luminol for the larger dataset which has almost 25k rows and the issue is by using algorithm as "bitmap_detector" ,the anomaly score for the initial 200 values and the last 200 values remains as "0.0" even if there is some difference within the input values .
If we try to pass only those 200 values we receive some anomaly scores. please respond asap.

Thanks,
Prabhat