Comparison of Tuberculosis Bacteria Classification from Digital Image of Sputum Smears

摘要

Tuberculosis is caused by Mycrobacterium tuberculosis which is known to be the most deadly infection disease in the world. Most of death cases caused by Tuberculosis occur in countries with low income. Tuberculosis can be identified using microscopic analysis by examining sputum sample from the suspected tuberculosis patient. Positive and negative tuberculosis was determined by the amount of bacteria found in sputum. Microscopic analysis is known to have weaknesses in distinguishing between tuberculosis bacterias. Also in counting the number of bacteria seen in the microscope because the tendency of it to accumulate together. In addition, manual counting of tuberculosis bacteria takes a lot of time, require high concentration and labor-intensive. We provide automated systems to distinguish between single and multiple tuberculosis bacteria and non-bacterial ones. The compared methods are backpropagation and K-nearest neighbor (KNN). Sputum sample digital images are converted to HSV color channels. The bacterial length and bacterial endpoint is a feature that is extracted from tuberculosis bacteria. This unique feature is used to classify which one is belong to single bacteria and which one is included as double bacteria. Based on the experimental results, both methods can be used to classify single bacteria and double bacteria with 93.22% accuracy for backpropagation and 94.92% for KNN. So K- NN method better than backpropagation method for classifying tuberculosis bacteria.