the simplest approach, a measure of the size (area) of the source candidate and the corresponding aperture photometry is directly obtained by defining the source edges as the [*loci*]{} where the photon density value is equal to the background density, without using a predefined aperture region.

Despite these properties, [vtpdetect]{} is not widely used compared to wavelet-based algorithms. The construction of VT has been considered to be very time-consuming, and [vtpdetect]{} was suggested to be applied only to small fields or low-event-density regions [@ebeling93]. Another major reason for this infrequent use is that the FOF algorithm has a severe source-blending problem, i.e., the merging of two or more neighboring sources into one. This is a well-known problem, which is particularly severe in deep fields where both the background and the source number density are high. Therefore, using [vtpdetect]{} requires significant additional work to obtain a well-characterized list of extended sources.

In this work we present a new end-to-end software by implementing the same VT+FOF method as used in @ebeling93 and solving these drawbacks. Most importantly, we add a self-contained deblending procedure and provide a well-characterized extended source list as the output. We preserve all advantages of [vtpdetect]{}, without introducing any 