我们从Python开源项目中，提取了以下9个代码示例，用于说明如何使用PIL.Image.PERSPECTIVE。
def call(self, img): if img is None: raise ValueError('img is None') width, height = img.size sym = img.copy() symmetry = False if random() < self.proba: from_points = [(0, 0), (width-1, 0), (width-1, height-1), (0, height-1)] new_points = [(width-1, 0), (0, 0), (0, height-1), (width-1, height-1)] coeffs = find_coeffs(new_points, from_points) sym = sym.transform((width, height), Image.PERSPECTIVE, coeffs, Image.BICUBIC) symmetry = True return sym, symmetry
def get(self): if self.draw_lines: self._create_lines() if self.draw_points: self._create_points() code_str = self._create_code_str() # ?????? params = [1 - float(random.randint(1, 2)) / 100, 0, 0, 0, 1 - float(random.randint(1, 10)) / 100, float(random.randint(1, 2)) / 500, 0.001, float(random.randint(1, 2)) / 500 ] img = self.img.transform(self.size, Image.PERSPECTIVE, params) # ???? img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) # ????????????? return img, code_str
def create_perspective(img, factor): img_size = img.size w = img_size[0] h = img_size[1] shifts = generate_random_shifts(img_size, factor) coeffs = find_coeffs( [(shifts[0][0], shifts[0][1]), (w + shifts[1][0], shifts[1][1]), (w + shifts[2][0], h + shifts[2][1]), (shifts[3][0], h + shifts[3][1])], [(0, 0), (w, 0), (w, h), (0, h)]) return img.transform((w, h), Image.PERSPECTIVE, coeffs, Image.BICUBIC) # due to rotation and/or perspective we will need to fill in the background
def sample_patch_perspective(image, inv_xform_3x3, patch_size): """ return an Image of size patch_size """ patch_size_tuple = (patch_size[0], patch_size[1]) inv_xform_array = inv_xform_3x3.reshape(9,) / inv_xform_3x3[2,2] patch = image.transform(patch_size_tuple, Image.PERSPECTIVE, inv_xform_array, Image.NEAREST) ones_img = Image.new('L', image.size, 255) mask = ones_img.transform(patch_size_tuple, Image.PERSPECTIVE, inv_xform_array, Image.NEAREST) return patch, mask
def create_validate_code(self, size=(120, 30), chars=init_chars, img_type="GIF", mode="RGB", bg_color=(255, 255, 255), fg_color=(0, 0, 255), font_size=18, font_type=fontType, length=4, draw_lines=True, n_line=(1, 2), draw_points=True, point_chance=2): width, height = size img = Image.new(mode, size, bg_color) draw = ImageDraw.Draw(img) if draw_lines: self.create_lines(draw, n_line, width, height) if draw_points: self.create_points(draw, point_chance, width, height) strs = self.create_strs(draw, chars, length, font_type, font_size, width, height, fg_color) params = [1 - float(randint(1, 2)) / 100, 0, 0, 0, 1 - float(randint(1, 10)) / 100, float(randint(1, 2)) / 500, 0.001, float(randint(1, 2)) / 500] img = img.transform(size, Image.PERSPECTIVE, params) img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) return img, strs
def call(self, img): if img is None: raise ValueError('img is None') width, height = img.size from_points = [(0, 0), (width-1, 0), (width-1, height-1), (0, height-1)] new_points = [(self.new_width-1, 0), (self.new_width+self.new_width-1, 0), (self.new_width*2+self.new_width-1, self.new_height-1), (0, self.new_height-1)] coeffs = find_coeffs(new_points, from_points) img = img.transform((self.new_width+self.new_width*2, self.new_height), Image.PERSPECTIVE, coeffs, Image.BICUBIC) return img
def code_img(code, size): r = Random() code = code len_code = len(code) font = ImageFont.truetype("Essence_Sans.ttf", size) font_width, font_height = font.getsize(code) font_width += size / 2 print font_width, font_height img = Image.new("RGBA", (font_width, font_height), (255,) * 4) draw = ImageDraw.ImageDraw(img) draw.text((size/10, -size/10), code, font=font, fill=(0, 0, 0)) params = [1, 0, 0, 0, 1 - float(r.randint(1, 10)) / 100, 0, 0.001, float(r.randint(1, 2)) / 500 ] print params img = img.transform((font_width, font_height), Image.PERSPECTIVE, params) img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) img.save("test.jpg")
def draw_picture(img_src): fap_path = os.path.join(os.path.dirname(__file__), "fap.png") # ?????????? ???????? response = requests.get(img_src) response.raise_for_status() image_bytes = io.BytesIO(response.content) # ????????? image = Image.open(image_bytes) fap_pic = Image.open(fap_path) if image.mode != 'RGBA': image = image.convert('RGBA') image_width, image_height = image.size fap_width, fap_height = fap_pic.size def find_coeffs(pa, pb): """ https://stackoverflow.com/questions/14177744/ ????? ????????? ????, ??? ??????? - ??????? """ matrix = [] for p1, p2 in zip(pa, pb): matrix.append([p1[0], p1[1], 1, 0, 0, 0, -p2[0]*p1[0], -p2[0]*p1[1]]) matrix.append([0, 0, 0, p1[0], p1[1], 1, -p2[1]*p1[0], -p2[1]*p1[1]]) A = numpy.matrix(matrix, dtype=numpy.float) B = numpy.array(pb).reshape(8) res = numpy.dot(numpy.linalg.inv(A.T * A) * A.T, B) return numpy.array(res).reshape(8) trans_coeff = find_coeffs( [(217,111),(412,115),(222,372),(403,371)], [(0,0), (image_width-1,0), (0,image_height-1), (image_width-1, image_height-1)]) resp_pic = image.transform(fap_pic.size, Image.PERSPECTIVE, trans_coeff, Image.BILINEAR) # ??????????? gesture ? image resp_bytes = io.BytesIO() Image.alpha_composite(resp_pic, fap_pic).save(resp_bytes, format='PNG') resp_bytes.seek(0) return resp_bytes
def create_validate_code(size=(120, 30), chars=init_chars, img_type="GIF", mode="RGB", bg_color=(245, 245, 245), fg_color=color_random, font_size=24, font_type=fontType, length=4, draw_lines=True, n_line=(1, 2), draw_points=True, point_chance=2): ''' @todo: ??????? @param size: ?????????????????(120, 30) @param chars: ????????????? @param img_type: ???????????GIF?????GIF?JPEG?TIFF?PNG @param mode: ????????RGB @param bg_color: ?????????? @param fg_color: ?????????????????#0000FF @param font_size: ??????? @param font_type: ????????? ae_AlArabiya.ttf @param length: ??????? @param draw_lines: ?????? @param n_lines: ?????????????????(1, 2)???draw_lines?True??? @param draw_points: ?????? @param point_chance: ?????????????[0, 100] @return: [0]: PIL Image?? @return: [1]: ?????????? ''' width, height = size # ?? ? img = Image.new(mode, size, bg_color) # ???? draw = ImageDraw.Draw(img) # ???? if draw_lines: create_lines(draw, n_line, width, height) if draw_points: create_points(draw, point_chance, width, height) strs = create_strs(draw, chars, length, font_type, font_size, width, height, fg_color()) # ?????? params = [1 - float(random.randint(1, 2)) / 100, 0, 0, 0, 1 - float(random.randint(1, 10)) / 100, float(random.randint(1, 2)) / 500, 0.001, float(random.randint(1, 2)) / 500 ] img = img.transform(size, Image.PERSPECTIVE, params) # ???? img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) # ????????????? return img, strs
