4/10/2023 0 Comments Raster graphic![]() How Colored images are stored on a computer? The matrix of numbers is known as the channel and in the case of a grayscale image, we have only one channel.0 represents black and 255 represents white.These pixel values represent the intensity of each pixel.Images are stored in the form of a matrix of numbers in a computer where these numbers are known as pixel values.Now let’s quickly summarize the points that we’ve learned so far. In this case, the shape of the matrix would be 24 x 16 Now can you guess the shape of this matrix? Well, it will be the same as the number of pixel values across the height and width of the image. So every image in a computer is saved in this form where you have a matrix of numbers and this matrix is also known as a Channel. The smaller numbers closer to zero represent the darker shade while the larger numbers closer to 255 represent the lighter or the white shade. For a grayscale or b&w image, we have pixel values ranging from 0 to 255. These pixel values denote the intensity of the pixels. Although we see an image in this format the computer store image in the form of numbers-Įach of these pixels is denoted as the numerical value and these numbers are called Pixel Values. Hence the dimension of this image will be 24 x 16. In this case, if you count, it would be 24 pixels across the height and 16 pixels across the width. What does that actually mean? This means that the dimension of the image is simply the number of pixels across the height(x) and width(y) of the image. We often use the term- the dimension of the image is X x Y. Now, if we zoom in further and if you look closely you can see that the images getting distorted and you would see some small square boxes on this image. ![]() Here we have taken a black and white image, also known as a Grayscale image. Vector images use limited effects: Vector images don't have the range of effects that can be applied like that of a photograph.How B&W or Grayscale images are stored in a Computer? Vector images have limited detail: Vector details are not ideal for complex blends or shades like that in a photograph. Vector images are Editable: You can modify individual elements without affecting other objects in the image. Vector images have Smaller File Sizes:Since there are no pixels of information in vector files, just mathematical points, the file size can remain small even when scaled very large. Vector images are Scalable: Vector files can be scaled up or down as much as you want without losing any image quality. Basically it is a finite square and as you enlarge it you begin to see that square. ![]() Raster images are Blurry When Enlarged: The biggest downfall to raster images is that they become when enlarged. Raster file format extensions include: jpg/jpeg, psd, png, tiff, bmp and gif. These hundreds or even millions of pixels (which are very tiny) when viewed on screen, produce very vivid and dynamic images. The most common raster graphic is a photograph. Vector file format extensions include: eps, ai and pdf.Ī raster graphic is an image made of little squares of color information called pixels. The most common types of vector graphics are fonts and logos. The vector image “connects the points” and fills in the rest. So for instance, a 1” x 1” square at 300 dpi will have 300 pixels of information for a raster image, and a vector square will contain just four points, one for each corner. ![]() Vector graphics use mathematical calculations to draw shapes using points, lines or curves. ![]()
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