32 lines
764 B
Python
32 lines
764 B
Python
import numpy as np
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# 定义4×4图像矩阵
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img = np.array([
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[255, 255, 0, 0],
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[255, 255, 0, 0],
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[0, 0, 255, 255],
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[0, 0, 255, 255]
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], dtype=np.uint8)
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print("原始图像：")
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print(img)
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print("-" * 30)
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# 1. 统计白色(255)和黑色(0)像素数量
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white_count = np.sum(img == 255)
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black_count = np.sum(img == 0)
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print(f"白色像素(255)数量：{white_count}")
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print(f"黑色像素(0)数量：{black_count}")
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print("-" * 30)
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# 2. 水平翻转并打印
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img_flip = np.fliplr(img)
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print("水平翻转后图像：")
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print(img_flip)
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print("-" * 30)
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# 3. 逆时针旋转90度（转置+上下翻转）
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# 方法：先转置，再上下翻转(np.flipud)
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img_rot90_ccw = np.flipud(img.T)
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print("逆时针旋转90度后图像：")
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print(img_rot90_ccw) |