> Thus, for ease of tracking and reading a wider range of text >view of a new design could be greater, thereby relaxing the precision needed So reading would be easier and faster if the field of >Optacon camera requires this scan to be very precise else the images of the >the hand held camera along a line of text. > In addition, reading with an Optacon requires the user to move >letterspace is equivalent to a visual resolution of only 20/40. Also, the Optacon's 24 pixels across a 0.1 inch >dots/inch compared to the 300 dots/inch typically considered to be the >24 pixels across a 0.1 inch letterspace, this is equivalent to only 240 >reading and tracking text at a practical speed. >with human subjects that indicated this was the minimum number of pixels for >6 columns of pixels that drove a corresponding array of 24 rows and 6 > The original Optacon was designed around an array of 24 rows and >them to assign priorities could help the process toward a new Optacon. Not all of these ideas may be worth developing, but considering
Below are my thoughts on design possibilities that could be >simplicity of the original Optacon while enabling new capabilities and > To reach the widest possible market, it is important to keep the >resolution, be easier to learn and use, and could have features that would >in technology make possible a new Optacon design that could have greater > Now, almost 40 years after the original Optacon design, advances >trying to maintain their Optacons and demanding a new Optacon. >production for over fifteen years, there are still over 150 avid users However, for those that mastered its use, the >together with the small market, made the Optacon a difficult product to > The custom integrated circuits and unique piezoelectric reeds, >photocells, and custom integrated circuits of shift register/bimorph >of piezoelectric reeds, or bimorphs, a custom integrated array of silicon >The final design incorporated a novel array of tactile stimulators composed >sighted, that used computer simulation of various designs to determine the >design was based on extensive experiments with human subjects, blind and >integrated circuits, silicon photocell arrays, and before microprocessors. > The Optacon was designed in the late sixties at the dawn of Old-timers among us will know who he is - the rest will just have to People might be interested to read this message from Jim Bliss. Reply: Robert Jaquiss: "Re: New Optacon Contemplations".Next in thread: Robert Jaquiss: "Re: New Optacon Contemplations".Previous message: Robert Jaquiss: "Fw: E-Access Bulletin: Issue 109, January 2009".Next message: Robert Jaquiss: "Re: New Optacon Contemplations".NFB-RD: New Optacon Contemplations New Optacon Contemplations From: David Andrews ( Mon 18:14:29 PST This property is defined in Cascading Style Sheets (CSS), Level 1 (CSS1). This example uses inline scripting to set the spacing to 1 millimeter when an onmouseover event occurs. This example uses blockQuote as a selector to change the spacing to -0.2 millimeters for all blockQuote objects on the page. The following examples use the letter-spacing attribute and the letterSpacing property to change the space between letters.
Letter spacing can be influenced by justification. A negative length value decreases the space between characters. When specified as a positive length value, the letter-spacing attribute adds the specified value to the default spacing between characters within an element. For more information, see About Dynamic Properties. The Cascading Style Sheets (CSS) attribute is inherited.Įxpressions can be used in place of the preceding value(s), as of Microsoft® Internet Explorer 5. The property has a default value of normal. The property is read/write for all objects except the following, for which it is read-only: currentStyle. For more information about the supported length units, see CSS Length Units Reference. Variant that specifies or receives one of the following values.įloating-point number, followed by an absolute units designator ( cm, mm, in, pt, pc, or px ) or a relative units designator ( em or ex ). Sets or retrieves the amount of additional space between letters in the object. Letter-spacing Attribute | letterSpacing Property
#Letterspace pc free#
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