不规则图案 meaning in English

irregular pattern
random pattern

For example , an image that is all black or all white has zero entropy ; an image of a chessboard , which contains an equal number of regularly distributed light and dark pixels , has low entropy ; images with more varied distributions of many intensity levels of pixel have high entropy and are considered more informative
例如，全黑或全白的图像熵值为零；又如，国际象棋棋盘的图案，其具有相等数量，并且有规则的明暗像素，这样的图像熵值较低;有着不规则图案和颜色层次复杂的图像具有较高的熵值，并且被认为包含更多的信息。