ALL-IDB is a dataset of microscopic images of blood samples, specifically designed for the evaluation and the comparison of algorithms for segmentation and image classification. The initiative is focused on Acute Lymphoblastic Leukemia (ALL), a serious blood pathology that can being fatal in as little as a few weeks if left untreated, most common in childhood with a peak incidence at 2-5 years of age.For each image in the dataset, the classification/position of ALL lymphoblasts is provided by expert oncologists.The images of the dataset has been captured with an optical laboratory microscope coupled with a Canon PowerShot G5 camera. All images are in JPG format with 24 bit color depth, resolution 2592 x 1944.