What is the characteristic feature of BMP image format?

The characteristic feature of the BMP (Bitmap) image format is that it typically results in low-quality images with large file sizes. BMP files are uncompressed or minimally compressed, which means they retain a lot of detail and color information, but this also leads to much larger file sizes compared to formats that utilize higher compression rates.

This lack of compression allows BMP images to maintain their quality across different displays and when processed, but the trade-off is that they take up significantly more disk space. It's worth noting that options related to compression and quality, such as high compression rates or lossless compression, do not accurately represent BMP's typical behavior, which is characterized by its bulkiness and straightforward representation of pixel data. While BMP can support a wide color range, the size and lack of advanced features like transparency are more defining traits of this format.