python生成图片

import cv2.cv as cv
saveImagePath = 'E:/ScreenTestImages/'
colorRed = [0,0,255]
colorGreen = [0,255,0]
colorBlue = [255,0,0]
colorWhite = [255,255,255]
colorBlack = [0,0,0]
colorAqua = [255,255,0]
colorFuchsia = [255,0,255]
colorYellow = [0,255,255]
stardardColors = [colorBlue,colorGreen,colorAqua,colorRed,colorFuchsia,colorYellow,colorWhite]
def createImg(depth=3):
    return cv.CreateImage((800,480),8,depth)
def saveImageFile(typeName,img):
    filename = saveImagePath + typeName + '.png'
    cv.SaveImage(filename,img)
    print typeName+'.png','\t\t...\tok'
def createOneColorImage(color):
    img = createImg()
    cv.Set(img,color)
    return img
def create64GrayImage():
    img = createImg(1)
    cv.SetZero(img)
    for xPos in range(0,64):
        cv.SetImageROI(img,(int(12.5*xPos),0,800,480))
        cv.Set(img,xPos*255/63)
        cv.ResetImageROI(img)
    return img
def createCheckBoardPattern(isReserved=False):
    img = createImg(1)
    boolColor = True
    numsX = 4
    numsY = 4
    pixsX = 800/numsX
    pixsY = 480/numsY
    for x in range(0,numsX):
        for y in range(0,numsY):
            cv.SetImageROI(img,(x*pixsX,y*pixsY,(x+1)*pixsX,(y+1)*pixsY))
            boolColor = not (x%2) ^ (y%2) ^ isReserved            
            cv.Set(img,255*boolColor)
            cv.ResetImageROI(img)           
    return img
def createStardardImage():
    img = createImg()
    pixs = 800./7
    for i in range(0,7):
        cv.SetImageROI(img,(int(i*pixs),0,int(i*pixs+pixs),480))
        cv.Set(img,stardardColors[i])
        cv.ResetImageROI(img)
    return img
if __name__ == '__main__':
    print 'Start Gen Test Screen Files ...'
    saveImageFile('red',createOneColorImage(colorRed))
    saveImageFile('green',createOneColorImage(colorGreen))
    saveImageFile('blue',createOneColorImage(colorBlue))    
    saveImageFile('white',createOneColorImage(colorWhite))
    saveImageFile('black',createOneColorImage(colorBlack))
    saveImageFile('64gray',create64GrayImage())
    saveImageFile('checkboard Pattern',createCheckBoardPattern())
    saveImageFile('checkboard Pattern(inverted)',createCheckBoardPattern(True))
    saveImageFile('standard',createStardardImage())
    print 'Generate Success!'

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