This document summarizes a presentation about developing a system to present images to blind people through tactile images. The system uses an image scanner and computer to process photographs into simple tactile representations that can be understood through touch. Key image processing techniques like edge detection, thresholding, and scaling are used to extract important attributes and convert images into patterns that are printed on braille paper. While losing detail, preliminary results found the tactile images effectively conveyed aspects of faces, leaves, and medical scans to blind users. Further work aims to develop a fully independent system for blind people to process and explore images through touch.

1. IMAGE PROCESSING -PRESENTATION OF IMAGES FOR THE BLIND -” A VISION FOR THE BLIND’” BY K.PARKAVI DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING, JEPPIAAR ENGINEERING COLLEGE, CHENNAI-119.

2. LOUIS BRAILLE PRESENTATION OF IMAGES FOR THE BLIND

5. Let us see how to develop a prototype system and to find out an effective way for image presentation for the blind.

6. INPUT DEVICE: Image scanner(CANON PIXEL JET),video Camera. MAIN PROCESSOR: Indy personal computer(PC) OUTPUT DEVICE: Braille printer plotter(New ESA721),image Printer(CANON PIXEL JET). SYSTEM CONFIGURATION

7. A System for image processing External appearance of indy PC and PIXEL JET

9. RESOLUTION The difference of effective resolution between image screen and Braille Printer plotter is very large as shown below: 1.The resolution of original image horizontal :<1280 vertical:<1024 2.The resolution of the Braille printer plotter. plotter step size is about 0.34mm,so the resolution is as follows: 793*600 for 10”11inch Braille paper 726*480 for 8”10inch Braille paper 3.The effective resolution of Braille image for 8*10inch Braille paper horizontal:145-242 vertical:96-160

11. PROCESSING FOR FACES The original is a scene captured by video camera. And it is image-processed. It to pick out the face’s outline and produced a simple tactile profile of the face

12. MAPLE LEAVES The original is a digital colour image on indy PC. Edge detection process was inserted before the thresholding process in face to represent the texture on maple leaves, and the other processes are the same as face.

19. BUT WE ARE NOW TRYING TO IMPLEMENT A SYSTEM IN WHICH A BLIND CAN EASILY IMAGE-PROCESS ORIGINAL IMAGES AND UNDERSTAND THEM AS TACTILE IMAGES BY THEIR OWN EFFORT IN THEIR FIATURE.

21. CAL-tac TM Notecards (Greeting Cards)

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24. Queries ? ? ?

25. THANK YOU………