Product Information

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The colour of Tasar yarns is determined by a number of production factors, any slight variation in any one of these factors lead to variation in colour of the yarn produced. At the present production technology, it is difficult to produce yarns of uniform colour at the producers’ level, but once produced, those yarns can be sorted based on its colour to pack yarns of uniform colour in a pack. The other important characteristic of tasar silk yarn is its lustrous nature, it reflects light, thus difficult to ascertain the exact colour manually. Slight variation in colour is difficult to detect manually but the market demands lots with perfectly uniformly coloured yarns within the lot though inter-lot variation in colour is encouraged. Currently this sorting procedure is done manually by human experts only in daylight. As human intervention is required, the process is subjective, error-prone, labour-intensive and time consuming.

Reshamdarshan system consists of a Lighting Arrangement, Camera Arrangement and Weight Measurement Arrangement. Along with these three modules the system has a sample-loading tray within it to put the sample for testing. Lighting arrangement has been designed for this system in such a manner that the illumination in all portion of the sample tray is almost uniform. This type of uniform illumination arrangement is necessary in silk color analysis because actual color of silk yarn samples varies with different intensities of light. A low cost webcam with 2 megapixel of still image sensor resolution has been used in camera arrangement. Camera arrangement has been fitted to the center of the light arrangement. The camera has been connected with the attached computer via USB 2.0 to feed the captured images to the Color Analysis Software. One weight measurement arrangement has been fitted under the sample-loading tray to measure the weight of testing sample. This module has been integrated for the ease of field level users.

Use Cases
  • Color inspection of Tasar yarn by the producers/buyers and Exporters.
  • Sericulture Research Laboratory.
  • Yarn processing / Quality control laboratories.
Salient Features
  • Graphical user Interface for easy operability.
  • Building colour templates automatically and Colour comparison.
  • Online weight measurement and Data logging.
  • Bar plot for distribution of different silk grades, Instant report generation and print out facility.
  • Compact in size for field mobility.
  • PC based online Image capture and instant colour analysis of the silk sample.

Technical Specifications

  • Portable system in enclosed cabinet
  • Compact diffused LED based uniform illumination
  • Integrated load cell with USB interface
  • Digital camera with USB interface
  • User friendly GUI
  • Display of live image on the sample tray
  • Online image acquisition & analysis
  • Colour matching information
  • Building colour template by training
  • Display of hank weight, cumulative weight
  • Setting of weight limit, visual alarm
  • Report generation
  • Desktop/Laptop with Pentium IV- 2.8 GHz, RAM: 2 GB Minimum
  • Operated with computer with Windows 7 and 10 (32/64 bit) operating system



Platform Required (if any)

  • Desktop/Laptop with Pentium IV- 2.8 GHz, RAM: 2 GB Minimum
  • Operated with computer with Windows 7 and 10 (32/64 bit) operating system


Contact Details for Techno Commercial Information

Agri and Environmental Electronics Group

  1. Mr Alokesh Ghosh
  2. Dr Amitava Akuli


Phone No: 033-23579846/5989