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Figure 9-10. Rotating a rectangle around its middle There s a clear limitation to using the CenterX and CenterY properties of RotateTransform. These properties are defined using absolute coordinates, which means you need to know the exact center point of your content. If you re displaying dynamic content (for example, pictures of varying dimensions or elements that can be resized), this introduces a problem. Fortunately, Silverlight has a solution with the handy RenderTransformOrigin property, which is supported by all shapes. This property sets the center point using a proportional coordinate system that stretches from 0 to 1 in both dimensions. In other words, the point (0, 0) is designated as the upper-left corner and (1, 1) is the lower-right corner. (If the shape region isn t square, the coordinate system is stretched accordingly.) With the help of the RenderTransformOrigin property, you can rotate any shape around its center point using markup like this:



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Jul 30, 2019 · Optical character recognition or optical character reader (OCR) is ... https://github.​com/naptha/tesseract.js/blob/master/docs/image-format.md.

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28 Sep 2018 ... OCR ( Optical Character Recognition ) is the computer process, which helps to ... Let's have look at simple example of OCR using tesseract . js . <!

fn:local-name(n) fn:local-name-from-QName(q) fn:max(x)

Note Under Visual Studio 2005, Option Strict is disabled for new Visual Basic 2005 projects. I would recommend, however, that you always enable this setting for each application you are creating, given that it is far better to resolve problems at compile time than runtime!

<Rectangle Width="80" Height="10" Stroke="Blue" Fill="Yellow" Canvas.Left="100" Canvas.Top="100" RenderTransformOrigin="0.5,0.5"> <Rectangle.RenderTransform> <RotateTransform Angle="25" /> </Rectangle.RenderTransform> </Rectangle> This works because the point (0.5, 0.5) designates the center of the shape, regardless of its size. In practice, RenderTransformOrigin is generally more useful than the CenterX and CenterY properties, although you can use either one (or both) depending on your needs.

Now that we have some compile-time checking, we are able to resolve the error using one of two approaches. The most direct (and often more favorable) choice is to simply redefine the variable to a data type that will safely hold the result. For example:

fn:min(x)





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Tip You can use values greater than 1 or less than 0 when setting the RenderTransformOrigin property to designate a point that appears outside the bounding box of your shape. For example, you can use this technique with a RotateTransform to rotate a shape in a large arc around a very distant point, such as (5, 5).

Sub Main() Console.WriteLine("***** The Amazing Addition Program *****") Dim a As Short = 30000 Dim b As Short = 30000 ' Nope...Dim answer As Short = Add(a, b) Dim answer As Integer = Add(a, b) Console.WriteLine("a + b = {0}", answer) ... End Sub Another approach is to make use of an explicit Visual Basic 2005 type conversion function, such as CByte() for this example: Sub Main() ... Dim myByte As Byte Dim myInt As Integer = 200 ' myByte = myInt myByte = CByte(myInt) Console.WriteLine("Value of myByte: {0}", myByte) End Sub

Another useful Option statement is Option Explicit. When enabled, the compiler demands that all variables are defined using a proper As clause (e.g., Dim a As Integer rather than Dim A). I would recommend you always enable Option Explicit, as this can pinpoint many otherwise unseen programming errors.

fn:namespace-uri(n) fn:namespace-uri-from-QName(q) fn:not(b)

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Tesseract.js is a pure Javascript port of the popular Tesseract OCR engine. This library supports more than 100 languages, automatic text orientation and script ...

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HOW TO EXTRACT TEXT FROM IMAGE USING JAVASCRIPT ( OCR ...
28 Sep 2018 ... OCR ( Optical Character Recognition ) is the computer process, which helps to ... Let's have look at simple example of OCR using tesseract. js . <!

The RenderTransform and RenderTransformOrigin properties aren t limited to shapes. The Shape class inherits them from the UIElement class, which means they re supported by all Silverlight elements, including buttons, text boxes, the TextBlock, entire layout containers full of content, and so on. Amazingly, you can rotate, skew, and scale any piece of Silverlight user interface (although in most cases you shouldn t). It s important to note that when you apply transforms to the elements in a layout container, the transforming is performed after the layout. For the simple Canvas, which uses coordinate-based layout, this distinction has no effect. But for other layout containers, which position elements relatively based on the placement and size of other elements, the effect is important. For instance, consider Figure 9-11, which shows a StackPanel that contains a rotated button. Here, the StackPanel lays out the two buttons as though the first button is positioned normally, and the rotation happens just before the button is rendered. As a result, the rotated button overlaps the one underneath.

Visual Basic 2005 provides a number of conversion functions in addition to CByte() that enable you to explicitly allow a narrowing cast when Option Strict is enabled. Table 3-7 documents the core VB 2005 conversion functions. Table 3-7. VB 2005 Conversion Functions

Figure 9-11. Rotating buttons WPF also has the ability to use layout transforms, which are applied before the layout pass. This means the layout container uses the transformed dimensions of an element when positioning other elements. However, Silverlight doesn t provide this ability.

fn:number(n) fn:position() fn:round(n) fn:string(a)

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Step #1 - MediaDevices.getUserMedia(). MediaDevices.getUserMedia is a browser API that allows web apps to access user's camera and microphone.

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The Vision API can detect and extract text from images. There are two annotation features that support optical character recognition (OCR):. TEXT_DETECTION ...












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