Surety is performing system maintenance this weekend. Electronic date stamps on new Prior Art Database disclosures may be delayed.
Browse Prior Art Database

Artificial Fresnel Lens With Invisible Ink/Hidden Comments Feature

IP.com Disclosure Number: IPCOM000248816D
Publication Date: 2017-Jan-13
Document File: 2 page(s) / 57K

Publishing Venue

The IP.com Prior Art Database


This idea is for a software based magnifier where the real time image captured by the imaging device is only used to assist in determining the location of the viewing device on a flat surface and the image presented is a magnified form of a previously captured image.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 51% of the total text.

Artificial Fresnel Lens With Invisible Ink/Hidden Comments Feature

Fresnel Lenses Can Be Very Useful. They are explained here: http://www.edmundoptics.com/resources/application-notes/optics/advantages-of-fresnel-lense s/

One common application is for people with visual difficulties to use them to magnify text to make reading easier.

They work well when the item being magnified is close to the lens, they are flat and light and so easy to carry, they can be rested on the page so are pleasant to use, are relatively cheap to make in large sizes.

The system herein combines recently captured document photograph with the ongoing optical sensing abilities of a mobile phone camera, together with the inertial/compass sensing to give orientation information and application control of the screen image to achieve an effect on the mobile phone screen of a Fresnel magnifying lens of an underlying document that the mobile phone is resting on.

It may be that one form of the system makes use of unique micro dots on the form, such as are described here: http://www.adapx.com/support/printing.

However we also envisaged a system that uses the phone camera to first capture the pages text/images of a completely standard document, and which creates a 'map' of the black and white territory the camera lens will observe (like a digital mouse) when resting and moving across on the page, the phones movements being tracked using compass and accelerometer features of the phone.

Once rested on the page the system makes use of the phones inertial and compass systems to keep track of its relative (x,y,rotation) location and continuously uses lens movement across text or images in the document like a bar-scanner, which it then matches to possible vectors across the page image it has just photographed - the calculated, estimated, relative (x,y,rotation) position is thus constantly calibrated to the physical location observed under the phone. The phone's inertial system can accurately track acceleration and integrate this to track small scale movements so the system would be able to operate even if the phone lens was off the page. Remember it is not necessary to be accurate to a high resolution for most applications and a user can easily adjust/shake the phone a bit if desired. Also, the upcoming multiple camera aperture phones would be able to make use of tracking from more than one lens at a time. (We suggest that phones will soon have 'top and bottom' camera's that approximate the distance between human eyes and are used for capturing parallax and thus 3D models of the word but that is not central to this system.)

The phones 'flash' can be located near enough to the camera aperture (as is already usually the case to support heart rate monitoring apps) and provide a tiny trickle of light to illuminated the few mm of paper under the lens.

If necessary, a special sup...