Commit946d75f

ex2tron

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添加高质量保存代码 2019年5月2日

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	`1`	`+# ex2tron's blog:`
	`2`	`+# http://ex2tron.wang`
	`3`	`+# 2019年5月2日`
	`4`	`+`
	`5`	`+importcv2`
	`6`	`+importnumpyasnp`
	`7`	`+`
	`8`	`+new_img=cv2.imread('lena.jpg')`
	`9`	`+# new_img = np.zeros((100,100,3)) # 新建一副纯黑色图`
	`10`	`+`
	`11`	`+# bmp`
	`12`	`+cv2.imwrite('img_bmp.bmp',new_img)# 文件大小：359KB`
	`13`	`+`
	`14`	`+# jpg 默认95%质量`
	`15`	`+cv2.imwrite('img_jpg95.jpg',new_img)# 文件大小：52.3KB`
	`16`	`+# jpg 20%质量`
	`17`	`+cv2.imwrite('img_jpg20.jpg',new_img,[int(cv2.IMWRITE_JPEG_QUALITY),20])# 文件大小：8.01KB`
	`18`	`+# jpg 100%质量`
	`19`	`+cv2.imwrite('img_jpg100.jpg',new_img,[int(cv2.IMWRITE_JPEG_QUALITY),100])# 文件大小：82.5KB`
	`20`	`+`
	`21`	`+# png 默认1压缩比`
	`22`	`+cv2.imwrite('img_png1.png',new_img)# 文件大小：240KB`
	`23`	`+# png 9压缩比`
	`24`	`+cv2.imwrite('img_png9.png',new_img,[int(cv2.IMWRITE_PNG_COMPRESSION),9])# 文件大小：207KB`
	`25`	`+`

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