METHOD AND APPARATUS FOR AUTOMATICALLY MAGNIFYING A TEXT BASED IMAGE OF AN OBJECT

• US 20110224967A1
• Filed: 06/16/2009
• Published: 09/15/2011
• Est. Priority Date: 06/16/2008
• Status: Abandoned Application

• Current Assignee: Optelec Development B.V.
• Original Assignee: Optelec Development B.V.
• Inventors: Van Schaik, Michiel Jeroen
• Application Number:
  US12/999,367
• Publication Number:
  US 20110224967A1
• Time in Patent Office: Days
• US Class Current: 704/2
• CPC Class Codes: G06T 3/40 Scaling of whole images or parts thereof, e.g. expanding or contracting
• CPC Class Codes: G06T 7/60 Analysis of geometric attributes
• CPC Class Codes: G09B 21/008 using visual presentation of the information for the partially sighted

Abstract

Method and apparatus for capturing a text based source image 5, 5A provided on an object 3 supported on a surface. Positioned above the object 3 is a camera 7 for capturing a view of the text based image 5, 5A. The camera 7, through lens 9 generates a focused image of at least part of the object 3 and transmits this image to a processor 11 for magnification of the image captured by the camera 7 to a size specified for display on a display device 15. In the processor 11 the magnification is effected to a rate that is controlled by the second predefined size for display 19, 19A of the font to appear on the display 15 and is independent of the first font size.

Claims

1. A method of automatically, directly and instantly magnifying a text based source image on an object containing fonts of a variable, undetermined, first size to a second predefined size for display, the method including:

providing the object with the text based source image;

positioning an image capture device in relation to the object to capture a view thereof;

generating a focused image of at least part of the object with the image capture device; and

transmitting the image to a display, wherein magnification is effected to a rate that is controlled by the second predefined size for display of the font to appear on the display and independent of the first font size.

2. The method of claim 1, further including analyzing a continuous video or photographic still source image as to the first font size and determining the magnification rate for the image to be displayed as an enhanced video or photographic still display image.

3. The method of claim 1, further including digitalization of the video or photographic still source image.

4. The method of claim 3, further including optical character recognition.

5. The method of claim 4, also including recreation of text from the source image, using at least one of a different font type, different line spacing and different character spacing.

6. The method of claim 1, wherein the magnification rate for the second font size is automatically variable between 3 times the first font size and 30 times the first font size.

7. The method of claim 1, wherein the second font size is pre-selectable to a value between 10 mm and 150 mm height.

8. The method of claim 1, also including preselecting display parameters relating to at least one of contrast, brightness, resolution and color.

9. The method of claim 8, wherein the text based source image containing fonts is enhanced for display by at least one of increasing brightness of the text in relation to background and darkness of the text in relation to background.

10. The method of claim 4, further including automatic translation from one recognized language into another predefined language.

11. The method of claim 8, wherein the color information in the source image is manipulated to create a display image with any one of a reduced gray gradation and a reduced color gradation.

12. The method of claim 8, wherein correction for color blindness is offered by shifting colors in the source image to different colors in the display image.

13. The method of claim 1, wherein an inability to recognize a source image to contain fonts or characters, automatically initiates a zoom-out of the image capture device and selection of a different contrast mode.

14. An apparatus for automatically magnifying a text based source image on an object containing fonts of a variable first size to a second predefined size for display, including:

an object support surface;

an image capture device;

a support for positioning and supporting the image capture device in relation to the object support surface;

a display for displaying the magnified image; and

a processor for transmitting and for magnifying an image captured by the image capture device to the display, wherein the processor includes means for varying the magnification in rate, in response to the second predefined size for display to appear on the display and independent of the first font size.

15. The apparatus of claim 14, wherein the display is a table top display.

16. The apparatus of claim 14, wherein the display is a spectacle mounted display.

17. The apparatus of claim 15, wherein the display is a liquid crystal display.

18. The apparatus of claim 14, wherein the display is a high resolution graphics array display.

19. The apparatus of claim 18, wherein the display is a wide screen version.

20. The apparatus of claim 14, wherein the display is adjustable for view.

21. The apparatus of claim 14, wherein the means for varying the magnification rate includes a microprocessor operating an automatic font size algorithm.

22. The apparatus of claim 14, wherein the image capture device is a camera and further including an automatic focus control to focus a lens used on the camera.

23. The apparatus of claim 14, further including illumination means, preferably a light source, to illuminate the source image.

24. The apparatus of claim 14, further including a microphone connected to the processer and means for speech recognition, capable of creating a text source for display in the predefined second font size.

25. The apparatus of claim 14, further including means to alter a zoom mode and a contrast mode of the image capture device in response to an inability to recognize text in the source image.