使用Python显示YUV420图像
由于网上没找到好用的显示YUV420semiplanar格式图像的工具，自己整理了一段显示YUV420图像的python代码，分享给大家。
###############################################################
# author: sl
# function: view yuv image file(only support YUV420SemiPlanar)
# date: 2016-8-30
###############################################################
from numpy import *
from PIL import Image
def readYuvFile(filename,width,height):
fp=open(filename,'rb')
uv_width=width//2
uv_height=height//2
Y=zeros((height,width),uint8,'C')
U=zeros((uv_height,uv_width),uint8,'C')
V=zeros((uv_height,uv_width),uint8,'C')
for m in range(height):
for n in range(width):
Y[m,n]=ord(fp.read(1))
for m in range(uv_height):
for n in range(uv_width):
V[m,n]=ord(fp.read(1))
U[m,n]=ord(fp.read(1))
fp.close()
return (Y,U,V)
def yuv2rgb(Y,U,V,width,height):
U=repeat(U,2,0)
U=repeat(U,2,1)
V=repeat(V,2,0)
V=repeat(V,2,1)
rf=zeros((height,width),float,'C')
gf=zeros((height,width),float,'C')
bf=zeros((height,width),float,'C')
rf=Y+1.14*(V-128.0)
gf=Y-0.395*(U-128.0)-0.581*(V-128.0)
bf=Y+2.032*(U-128.0)
for m in range(height):
for n in range(width):
if(rf[m,n]>255):
rf[m,n]=255;
if(gf[m,n]>255):
gf[m,n]=255;
if(bf[m,n]>255):
bf[m,n]=255;
r=rf.astype(uint8)
g=gf.astype(uint8)
b=bf.astype(uint8)
return (r,g,b)
if __name__=='__main__':
width=640
height=480
data=readYuvFile('/home/sl/xx.yuv',width,height)
Y=data[0]
im=Image.fromstring('L',(width,height),Y.tostring())
im.save('/home/sl/y.bmp')
im.show()
RGB=yuv2rgb(data[0],data[1],data[2],width,height)
im_r=Image.fromstring('L',(width,height),RGB[0].tostring())
im_g=Image.fromstring('L',(width,height),RGB[1].tostring())
im_b=Image.fromstring('L',(width,height),RGB[2].tostring())
im_rgb=Image.merge('RGB',(im_r,im_g,im_b))
im_rgb.save('/home/sl/rgb.bmp')
im_rgb.show()