pixels
You can not enlarge bitmap images without losing quality and bitmap images are larger in size then vector.
The image on the sensor isn't any image format, when this analogue data is put through the A/D converter and saved they are saved in a bitmap container (Jpeg and Raw (NEF, CR2, PEF Etc.) are all bitmap formats) all images are either a bitmap or a vector graphic, out of the camera they are bitmap, but the data in the file can be opened as a Vector Graphic in some programs.
You can make a bitmap in paint. When you save your image just choose .bmp as the file extension.
BITMAP or GIF images
Yes, it can be used to edit many types of image files, including bitmap images.
BITMAP or GIF images
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a bitmap
Most images you see on your computer are composed of bitmaps. A bitmap is a map of dots, or bits (hence the name), that looks like a picture as long you are sitting a reasonable distance away from the screen. Common bitmap filetypes include BMP (the raw bitmap format), JPEG, GIF, PICT, PCX, and TIFF. Because bitmap images are made up of a bunch of dots, if you zoom in on a bitmap, it appears to be very blocky. Vector graphics (created in programs such as Freehand, Illustrator, or CorelDraw) can scale larger without getting blocky.
Yes, bitmap means pixel based.
Photoshop is a raster image editor. Raster and Bitmap are two words for the same thing, so Photoshop is raster or Bitmap image editor, somewhere you will see raster, somewhere bitmap as explanation but it is basically same thing. Photoshop is primarily designed to work with bitmap images which are raster images in other words.
Vector and bitmap are both image files. Bitmapped images are images that are stored on a pixel by pixel basis and because of this, when you enlarge the image it can appear blocky. A vector image is constructed from dots, lines, shapes, etc. Each part has a particular position within the image with it's own dimensions. Because vector images are constructed using images, they can be enlarged without loss of image quality. Vector images do not get the blocky appearance of an enlarged bitmap image.