[Python] Image Processing Example

1. Image Processing Library

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import PIL from PIL import Image class pyimg(): def __init__(self): pass def new(self): self.image = PIL.Image.new() def open(self, filename): self.image = PIL.Image.open(filename) def close(self): self.image.close() def copy(self): new_image = pyimg() new_image.image = self.image.copy() #copy.deepcopy(self.image) return new_image def save(self,filename): self.image.save(filename) def show(self): self.image.show() def quantize(self,colors): #Image.quantize(colors=256, method=None, kmeans=0, palette=None) #method: 0 = median cut 1 = maximum coverage 2 = fast octree self.image = self.image.quantize(colors) def convertToGray(self): #Image.convert(mode=None, matrix=None, dither=None, palette=0, colors=256) #mode: 1, L, P, RGB, RGBA, CMYK, YCbCr, LAB, HSV, I, F self.image = self.image.convert('L') def convertToBW(self): self.image = self.image.convert('1') def crop(self,box): self.image = self.image.crop(box) #left,upper,right,lower def cropWH(self,box): #left,upper,width,height box[2] = box[0] + box[2] box[3] = box[1] + box[3] self.image = self.image.crop(box) #left,upper,right,lower def cropBorder(self,box): #left,top,right,bottom box[2] = self.image.width - box[2] box[3] = self.image.height - box[3] self.image = self.image.crop(box) #left,upper,right,lower def resize(self,size,resample=0): #Image.resize(size, resample=0) #resample: PIL.Image.NEAREST, PIL.Image.BILINEAR, PIL.Image.BICUBIC, PIL.Image.LANCZOS self.image = self.image.resize(size, resample=resample) def resizeWidth(self,width,resample=0): radio = width / self.image.width height = int(radio * self.image.height) self.image = self.image.resize((width,height), resample=resample) def resizeHeight(self,height,resample=0): radio = height / self.image.height width = int(radio * self.image.width) self.image = self.image.resize((width,height), resample=resample) def resizeBox(self,size,resample=0): width = size[0] radio = width / self.image.width height = int(radio * self.image.height) if height > size[1]: height = size[1] radio = height / self.image.height width = int(radio * self.image.width) self.image = self.image.resize((width,height), resample=resample) def rotate(self,degree,expand=0): #Image.rotate(angle, resample=0, expand=0) self.image = self.image.rotate(degree,expand) def flipLR(self): self.image = self.image.transpose(PIL.Image.FLIP_LEFT_RIGHT) def flipTB(self): self.image = self.image.transpose(PIL.Image.FLIP_TOP_BOTTOM) def flip90(self): self.image = self.image.transpose(PIL.Image.ROTATE_90) def flip180(self): self.image = self.image.transpose(PIL.Image.ROTATE_180) def flip270(self): self.image = self.image.transpose(PIL.Image.ROTATE_270)

2. Image Processing Library Test Example

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if __name__ == "__main__": img = pyimg() img.open('D:/line.png') img2 = img.copy() img2.resizeBox([800,200]) img2.show() img2.save("D:/Temp_c.png")