Abstract: The invention relates to computer-implemented methods for classification of the quality of a vascular image comprising determining of a local spatial orientation and frequency variation, variation in brightness, global contrast, and vessel contrast. Provided are methods for correction of the quality of a vascular image, for classification of quality enhanceability of a vascular image, and for obtainment of a quality enhanced vascular image comprising at least one technique selected from the group of focus correction, illumination correction, and contrast correction. The invention further relates to a storage device, a server and/or a capturing system comprising the computer-implemented method of the invention.