read data function for project colour base image retrieval

设置函数曲线图颜色的用户界面，调整和设置图像色彩。-Function curve of the color settings of the user interface, image adjustments and color settings.

flower image uploaded white colour

Normalises image values to 0-1, or to desired mean and variance Usage: n = normalise(im) Offsets and rescales image so that the minimum value is 0 and the maximum value is 1. Result is returned in n. If the image is colour the