1. A portable, handheld device for forensic analysis, the device comprising: a memory unit having an executable program recorded therein; an input unit configured to receive a forensic input at a scene of forensic analysis at which the forensic input is collected; and a processing unit configured to, by executing the program recorded in the memory unit at the scene of forensic analysis, generate a first image of the received forensic input, scale the generated first image to a predetermined format suitable for forensic analysis, and generate a second image of the forensic input in which the first image is scaled to the predetermined format, record the second image of the forensic input in the memory unit, compare the second image with forensic records, each forensic record respectively including previously collected forensic data associated with one or more individuals or specimens, determine whether the second image matches at least a portion of at least one of the forensic records based on the comparison, upon determining that the second image matches at least a portion of at least one of the forensic records, generate a matching notification identifying the at least one record which the second image is determined to match, and output the generated matching notification on the device, wherein the input unit comprises: a laser light source configured to output at least two parallel laser lights on a surface of an object that includes the forensic input at the scene of forensic analysis, the at least two laser lights being output toward respectively different positions on the surface of the object, and a camera configured to generate the first image of the received forensic input that shows the at least two laser lights positioned on the surface of the object, wherein the processing unit is configured to determine at least one scaling dimension of the forensic input on the surface of the object contained in the first image based on a first positional relationship between the at least two laser lights output on the surface of the object and a second positional relationship between two points of interest in the first image.