What is a bitmap?
A bitmap is mostly used to describe raster or bitmap image formats, but other data formats too!
1.) Understanding a bitmap!
It is known to most as a BMP file used by Microsoft as bitmap images. These can be stored as either 4-bit (16 colors), 8-bit (256 colors), 16-bit (65,536 colors), or 24-bit (16.7 million colors)!
But bitmap data is used for many other data, such as elevation maps in 3D games or landscapes and anywhere lossless information is important!
2.) Technical information and suggestions on the subject of bitmaps!
A bitmap, also called a raster image or pixel map, is a digital image format used to display images or graphics. This is a type of image file that stores graphical data as a grid of individual pixels. Each pixel in a bitmap image is assigned a specific color or grayscale value, and the arrangement of these pixels forms the image.
Here are some key features of bitmaps:
Pixel-based: Bitmap images are made up of a grid of tiny squares called pixels. Each pixel represents a specific color or shade and the entire image is created by the combination of these pixels.
►► How does the image comparison software work?
Resolution: Bitmap images have a fixed resolution, which determines the level of detail and clarity of the image. Higher resolution images have more pixels per inch (PPI) and typically appear sharper.
File Formats: Bitmap images are commonly saved in file formats such as JPEG, PNG, BMP, GIF and TIFF. Each format has its own characteristics and compression methods.
File size: The file size of a bitmap image can be relatively large, especially for high-resolution images, because data is stored individually for each pixel.
Lossless vs. lossy compression: Bitmap formats such as PNG and TIFF can support lossless compression, meaning no image quality is lost during compression. Other formats such as JPEG use lossy compression, which reduces file size but can result in a loss of image quality.
►► What is lossless compression?
Editing: Bitmap images are suitable for photo editing and editing in programs such as Adobe Photoshop because you can edit individual pixels. However, resizing or enlarging a bitmap image can result in a loss of quality known as pixelation.
The most common uses for bitmap images include photos, digital art, scanned documents, and detailed graphics. They are good for displaying complex images with different colors and details, but may not be ideal for images that need to be resized frequently or that require a transparent background (which vector graphics are better for).
FAQ 253: Updated on: 6 October 2023 20:58
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