s1 = Delta/(value + 0.001) s2 = Delta/(2 - value + 0.001) s = s1 * mask_1 + s2 * (1 - mask_1) if Increment >= 0 : temp = Increment + s mask_2 = temp > 1 alpha_1 = s alpha_2 = s * 0 + 1 - Increment alpha = alpha_1 * mask_2 + alpha_2 * (1 - mask_2) alpha = 1/(alpha + 0.001) -1 img_out[:, :, 0] = img[:, :, 0] + (img[:, :, 0] - L * 255.0) * alpha img_out[:, :, 1] = img[:, :, 1] + (img[:, :, 1] - L * 255.0) * alpha img_out[:, :, 2] = img[:, :, 2] + (img[:, :, 2] - L * 255.0) * alpha else: alpha = Increment img_out[:, :, 0] = L * 255.0 + (img[:, :, 0] - L * 255.0) * (1 + alpha) img_out[:, :, 1] = L * 255.0 + (img[:, :, 1] - L * 255.0) * (1 + alpha) img_out[:, :, 2] = L * 255.0 + (img[:, :, 2] - L * 255.0) * (1 + alpha) img_out = img_out/255.0 # 饱和处理 mask_1 = img_out < 0 mask_2 = img_out > 1 img_out = img_out * (1-mask_1) img_out = img_out * (1-mask_2) + mask_2 plt.figure() plt.imshow(img/255.0) plt.axis('off') plt.figure(2) plt.imshow(img_out) plt.axis('off') plt.show()