Diseño y construcción de un prototipo digitalizador de imágenes registradas en material fotosensible.

Abstract

It was designed and built a prototype digitizer of images recorded in photosensitive material. It consists of five stages, where the sensing stage allows getting the position within the limits of the work space, in which the slide can be moved. In the parameter entry and display stage, the focus distance, the amount of red, green, blue light, and luminous intensity are controlled through an HMI screen. In addition, these parameters can be controlled remotely with a mobile app. The processing stage is made up of an ESP32, which is responsible of receiving, processing and interpreting the information. The actuation stage executes the instructions sent by the development board, where the actuators are made up of RGB lights and stepper motors. Finally, the image acquisition stage consists of the camera that is integrated into the prototype allowing the capture of the image recorded in the photosensitive material, obtaining the digitized image from this process. From the tests carried out on RGB lights, it was determined that the highest coefficient of variation is 5.96%, establishing that there is color stability. In the error tests presented by the stepper motors, it was determined that the range of distance error that can occur in the prototype varies from 0.10mm to 0.50mm. Based on the evaluations made by the group of experts, it was established that the photographs obtained by the prototype have an average acceptance of 4.7 out of 5. From what was analyzed, it is concluded that better photographs are obtained from the developed prototype than with similar commercial equipment. It is recommended to incorporate a high resolution sensor in megapixels to the prototype, with the purpose of enabling automatic control run by the device.