Calculation and Function of Composition Proportion in Photography Based on Digital Information Technology

Table 1

Different image attack experiments.

Rotation attack	Rotation angle	Original drawing	30°	60°	90°	135°
	Feature points	300	290	294	301	305
Noise attack	Noise type	Original drawing	Salt and pepper noise (strong)	Salt and pepper noise (weak)	Gaussian noise (strong)	Gaussian noise (weak)
	Feature points	300	311	305	314	302
Scale transformation	Ruler size	Original drawing	5 times smaller	3 times smaller	2 times smaller	4 times smaller
	Feature points	300	285	292	308	310