Learn in the textbookFile Formats for Still Images and Documents
DefinitionBMP is an image format that records the colors of the dots making up an image (pixels (画素)) in sequence, essentially without compression.
ExplanationIt is the standard image format used in Windows. Because it is not compressed, quality never drops, but files tend to be large as a result. Since the picture is drawn by laying out pixels, its edges look jagged when it is enlarged a lot.
AnalogyIt is like copying a picture by coloring every single square on graph paper. The copy is accurate, but it uses a lot of paper.
Memory hookThe name shortens Bitmap to the three letters B, M and P, and the file extension is .bmp as well.