This is a fairly easy task for the human eye, but a very tricky one for a computer. As such, it’s OCR that enables a computer to convert text in technical drawings.įor OCR to work, it needs to be able to recognize certain letterforms. Optical Character Recognition, or OCR, is the technology which lets software detect raster text and convert it to vector text. Luckily, OCR software now makes it possible to automatically convert text in technical drawings. This isn’t exactly the most elegant solution. In the past, the only way around this was to overlay a vector layer on top of your raster image, and manually type new vector text in place of the old raster text. To a machine, however, it’s just a collection of black, white and gray pixels. The human eye may be able to tell, for example, that an image contains the word “CAD” in black on a white background. This lack of structure means that it’s difficult for software to detect what exactly the image contains. If you’re familiar with converting raster images to vector, you’ll know that the process, which is known as vectorization, is technically highly complex. The reason why vectorization is so tricky comes down to the fact that a raster image has no structure. This, in turn, would make it much easier to produce the design when it comes to the manufacturing stage. ![]() If you were creating an electrical schematic, for example, then CAD software would enable you to define its components and materials. The key reasons for this are that vector images are editable and versatile. How to convert text in technical drawingsĬonverting an image of an electrical schematic containing text to vector text stirngsĮditing technical drawings requires CAD software-and to use CAD software, you’ll need to be using a vector image. If this is the case, then you’ll need to move onto converting your raster text to vector text. However, while this advice is all well and good when creating a new technical drawing, it doesn’t solve the issue of what to do when you already have a technical drawing saved as a raster image. The list of pros and cons lays the choice bare: vector text is simply better for technical drawings. ✓You can attach specifications to the text object ✓Vector text is a mathematically defined object ✓ It’s easy to edit vector text in CAD software ✗ You can’t attach any additional data to it ![]() ✗ It easily becomes pixelated upon zooming or scaling As such, if you’ve got a technical drawing, you need it to be in a vector format. To use these drawings to their full potential, they must be fully editable in CAD software. Problems arise, however, when you have a technical drawing. vector text in technical drawingsįor many purposes, raster text works perfectly well. These include pixelation when zooming or scaling an image, and the inability to attach data to your text. Worse still, it comes with a whole host of other common raster image issues. To put a long story short, raster text is simply unsuitable for editing. In some cases, however, even this might not be possible. If you’re lucky, you might be able to use a paint brush or eraser tool to white out the text in your image-already a cumbersome process. It is impossible, for example, to go back and edit the text in your raster image. Anyone who’s ever had to edit a raster image will be well aware of the problems this causes. With this in mind, any text that features in a raster image is, in a technical sense, nothing more than pixels. As such, there is no particular structure to a raster image, and nothing to distinguish one part of an image from another. Each pixel is no more and no less than a square of color. Pixels are the building blocks that make up the entirety of a raster image. This raster version of a floorplan is not editable nor scalable. We’ll even show you the best OCR software to use to convert your text. After that, we’ll move onto how to perform the conversion, and provide some pro tips to help you ensure that everything passes off without a hitch. We’ll also go into detail about why this process can be quite tricky, and alert you to some of the problems you may encounter. ![]() We’ll start with the reasons why it’s so important to convert your text. In this article, we’ll run through everything you need to know about converting text in technical drawings. This means that, if you have a technical drawing containing text, then converting it from raster to vector is the logical choice. A vector image, however, is capable of storing text as a separate, editable entity. As such, it’s indistinguishable on a technical level from the remainder of the image. The text in a raster image is nothing more than a collection of pixels. A key benefit of vector images over their raster counterparts is their ability to include editable text.
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