Every file in your computer is made of binary numbers, whether that is an image file or a text file.Basic Text Encoding is a sweet example to handle binary data but I wanted a little complex demonstration of creating well-known file formats.
Delphi Png Invalid Graphic Format Code A BMPSince Bitmap or BMP is a lossless and uncompressed image format and it felt natural to encode a BMP image for demonstration.Unlike plain text encoding, BMP is complicated because of the so-called required metadata.
By doing trial-and-error, I finally arrived at some conclusions. In this article, we will discuss what BMP image is consists of, what are the encoding parameters of the BMP image format and how we can create some simple BMP images just by playing with binary values. Disclaimer: The concepts discussed in this tutorial are not meant to be applied in production, especially when dealing with efficiency and performance. There are other great image formats like PNG, JPEG and WebP for storing and transferring image data over a network. Delphi Png Invalid Graphic Format Professional When ComesAlso, I am not a professional when comes to image processing, so please correct me if I made a mistake anywhere. About Bitmap images A bitmap image is a raster image ( containing pixel data as opposed to vector images ) format. Each pixel of a bitmap image is defined by a single bit or a group of bits. Bitmap AKA Device Independent Bitmap (DIB) was designed by Microsoft Corporation to easily exchange images between different devices without worrying about the devices logic to display raster images on the screen. These files have.bmp or.dib extensions. Technically, a Bitmap image is an uncompressed file format which means, every pixel of an image has its own bit (or group of bits) in the file. However, some other formats like PNG and JPEG, they use some compression methods to group similar pixels to decrease overall file size. Hence, technically PNG or JPEG image is a map of bits but they are not called bitmaps because they are compressed. The Lossy Compression is a compression algorithm that changes pixel information to decrease filesize without too much harming the image details. However, BMP images can optionally be compressed using lossless algorithms like Huffman and RLE compression. The color depth is a measure of an individual image pixel to accurately represent a color. For example, 1-bit color depth or 1bpp means a pixel can have a 1-bit color or 2 values. Monochromatic images have 1-bit color depth because a pixel can be true black or true white. BMP format supports 1-bit, 2-bit, 4-bit, 16-bit, 24-bit, and 32-bit color depths. BMP allows an alpha-channel to add transparency in the image using 32-bit color depth. Since Bitmap images are great at storing raw-uncompressed data, they are great for archival purpose and image processing. BMP file format From here onwards, we will use BMP term to specify a Bitmap image format without any compression of any kind.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |