A Novel Technique of Noninvasive Hemoglobin Level Measurement Using HSV Value of Fingertip Image
This addresses the need for accessible, noninvasive hemoglobin testing, particularly in resource-limited settings, though it is incremental as it builds on existing color analysis techniques.
The researchers developed a smartphone-based method to predict hemoglobin levels noninvasively by analyzing HSV values from fingertip videos, achieving an R² of 0.95 across two datasets.
Over the last decade, smartphones have changed radically to support us with mHealth technology, cloud computing, and machine learning algorithm. Having its multifaceted facilities, we present a novel smartphone-based noninvasive hemoglobin (Hb) level prediction model by analyzing hue, saturation and value (HSV) of a fingertip video. Here, we collect 60 videos of 60 subjects from two different locations: Blood Center of Wisconsin, USA and AmaderGram, Bangladesh. We extract red, green, and blue (RGB) pixel intensities of selected images of those videos captured by the smartphone camera with flash on. Then we convert RGB values of selected video frames of a fingertip video into HSV color space and we generate histogram values of these HSV pixel intensities. We average these histogram values of a fingertip video and consider as an observation against the gold standard Hb concentration. We generate two input feature matrices based on observation of two different data sets. Partial Least Squares (PLS) algorithm is applied on the input feature matrix. We observe R2=0.95 in both data sets through our research. We analyze our data using Python OpenCV, Matlab, and R statistics tool.