A digital image is an image composed of picture elements, also known as pixels, each with finite, discrete quantities of numeric representation for its intensity or gray level that is an output from its two-dimensional functions fed as input by its spatial coordinates denoted with x, y on the x-axis and y-axis.

An Image is a spatial representation of a two dimensional or three-dimensional scene. An image is also a two-dimensional array specifically arranged in rows and columns. Digital Image is composed of picture elements, image elements, and pixels. A Pixel is most widely used to denote the elements of a Digital Image.

1.1 What is an image? An image is an array, or a matrix, of square pixels (picture elements) arranged in columns and rows. Figure 1: An image — an array or a matrix of pixels arranged in columns and rows.

1) An image is a picture that has been created or copied and stored in electronic form. An image can be described in terms of vector graphics or raster graphics. An image stored in raster form is sometimes called a bitmap. The GIF uses the 2D raster data type and is encoded in binary.

Common Image File Formats

• TIFF (. tif, . tiff)
• GIF (. gif) GIF or Graphics Interchange Format files are widely used for web graphics, because they are limited to only 256 colors, can allow for transparency, and can be animated.
• PNG (. png)
• EPS (. eps)
• RAW Image Files (. raw, .

Thanks to PNGs’ high color depth, the format can easily handle high resolution photos. However, because it is a lossless web format, file sizes tend to get very large. If you’re working with photos on the web, go with JPEG. You can definitely print a PNG, but you’d be better off with a JPEG (lossy) or TIFF file.

png or any other pixel based format you must save it with an higher resolution, that will make it look crisp, even if you zoom in. To do so you must click in Illustrator on File -> Export -> Select JPEG -> and change in the upcomming dialog to your desired Resolution (default is 72ppi).

Hi-res images are at least 300 pixels per inch (ppi). This resolution makes for good print quality, and is pretty much a requirement for anything that you want hard copies of, especially to represent your brand or other important printed materials. Use hi-res photos for sharp prints and to prevent jagged lines.

How to sharpen PNG?

1. Press START to launch Raw.pics.io app.
2. Upload your PNG pics that you want to clean.
3. Choose Edit in the left sidebar to open Raw.pics.io editing toolbox.
4. Select Sharpen among all other tools on the right.
5. Save your modified PNG pictures and find them in your downloads folder.