You can see this in some of the home movies that are shot in this resolution and which are stretched to fit your TV monitor.

For instance, if you take an image that is 320 by 240 resolution and you attempt to scale it so that its dimensions have doubled, you will notice some pixelation. One disadvantage of raster images however is that they don’t scale very well. In order to eliminate flicker, most monitors refresh the screen at a 60 Hz rate. Since the phosphor’s luminance begins to fade after a short time, the image needs to be refreshed continu-ally. An image (raster) is displayed by scanning the electron beam across the screen. At the zoomed in level, it becomes possible to individually manipulate the image one pixel at a time (if you want) using the paint bucket and other tools. phosphor screen by means of high voltage grids. I’ve worked a lot with raster graphics, and like the article says, the images are split up into grids of pixels.Īs a matter of fact, if you open up a raster graphic image in a paint program you can zoom in and see the individual pixels. Nowadays of course there are still cameras that have high resolution raster graphic capability you can print at much higher resolution. These pictures were okay on a computer monitor, but if you printed them out you could only print out a small picture because they couldn’t scale up to fill a 4 by 6 or 5 by 7 photo print. In the early days of digital camcorders with still camera capability, they took pictures in low resolution. For that reason I just stay with the default resolution of the image. I’ve noticed that myself when I play around with some image editing programs and try to scale up an image. September 4, - That’s true the raster grid doesn’t look as good when you expand it. A compression program looks for patterns of repetition among these numbers and squeezes the compressed file down to smaller size. The reason is that all of the pixels are essentially just numbers. What I like also about the raster format is that, regardless of the resolution, raster data is easy to compress. He is able to create posters with these images, all with rich color and stunning clarity. My friend has a still camera with something on the order of 12 megapixel resolution for his images. CRT is a technology used in traditional computer monitors and televisions. Vector Scan or Random Scan Display in this technique, the electron beam is directed only to the part of the screen where the picture is to be drawn rather. I was then able to scale my small GIF animation to where it filled the whole screen, with no loss of resolution! Talk about an easy way to do an animation. I got a GIF animated raster image, and used a vector image program to convert it from raster to vector format.

I did this once and the results were amazing.

You can even do a raster conversion where you convert from raster to vector and vice-versa. Unlike the raster image, which stores everything as pixels, vectors use mathematical formulas to compute the lines and curves the upshot is that the final image is completely scalable. The new thing these days is the vector format. September 5, - I’d like to point out that the raster image format, with all its pluses and minuses, is not the only kid on the block in this regard. Vector Scan Displays, Random Scan Devices, Line Plotters The electron.

Do lcd screens raster scan