Comparisons of BMP JPEG and PNG files

Each image is 100x100 (10,000 pixels).
BMP is 3B/pixel (RGB components of pixel). 10,000*3=30,000=22.3K
JPEG lossy compression.
PNG lossless compression.

	BMP	JPEG	PNG
One color
	30054 B	356 B	237 B
16 colors in 10x10 blocks
	30054 B	3260 B	506 B
16 colors in single pixels
	30054 B	7522 B	6931 B
True Color single pixels
	30054 B	6326 B	30209 B

JPEG: mildly smeared/blurred and color-simplified

	BMP	JPEG	PNG
one pixel (1x1)
	58 B	288 B	90 B
vertical line (1x100)
	454 B	298 B	96 B
horizontal line (100x1)
	354 B	298 B	92 B

can't create empty image file? a "null image".