python类getRotationMatrix2D()的实例源码

def _random_roate(self, images, labels, degree):
        if(images.shape[0] != labels.shape[0]):
            raise Exception("Batch size Error.")
        degree = degree * math.pi / 180
        rand_degree = np.random.uniform(-degree, degree, images.shape[0])

        o_images = np.zeros_like(images)
        o_labels = np.zeros_like(labels)
        for idx in xrange(images.shape[0]):
            theta = rand_degree[idx]

            # labels
            for ii in xrange(self.points_num):
                o_labels[idx, 2*ii: 2*ii+2] = self._rotate(labels[idx, ii*2: 2*ii+2], theta)

            # image
            M = cv2.getRotationMatrix2D((self.img_width/2,self.img_height/2),-theta*180/math.pi,1)
            o_images[idx] = np.expand_dims(cv2.warpAffine(images[idx],M,(self.img_width,self.img_height)), axis=2)

        return o_images, o_labels

def rotate_image(mat, angle):
    height, width = mat.shape[:2]
    image_center = (width / 2, height / 2)

    rotation_mat = cv2.getRotationMatrix2D(image_center, angle, 1)

    radians = math.radians(angle)
    sin = math.sin(radians)
    cos = math.cos(radians)
    bound_w = int((height * abs(sin)) + (width * abs(cos)))
    bound_h = int((height * abs(cos)) + (width * abs(sin)))

    rotation_mat[0, 2] += ((bound_w / 2) - image_center[0])
    rotation_mat[1, 2] += ((bound_h / 2) - image_center[1])

    rotated_mat = cv2.warpAffine(mat, rotation_mat, (bound_w, bound_h))
    return rotated_mat

def _batch_random_roate(self, images, labels, degree):
        if(images.shape[0] != labels.shape[0]):
            raise Exception("Batch size Error.")
        degree = degree * math.pi / 180
        rand_degree = np.random.uniform(-degree, degree)

        o_images = np.zeros_like(images)
        o_labels = np.zeros_like(labels)
        for idx in xrange(images.shape[0]):
            theta = rand_degree

            # labels
            for ii in xrange(self.points_num):
                o_labels[idx, 2*ii: 2*ii+2] = self._rotate(labels[idx, ii*2: 2*ii+2], theta)

            # image
            M = cv2.getRotationMatrix2D((self.img_width/2,self.img_height/2),-theta*180/math.pi,1)
            o_images[idx] = np.expand_dims(cv2.warpAffine(images[idx],M,(self.img_width,self.img_height)), axis=2)

        return o_images, o_labels

def data_augmentation(im, label):
    rotatation_angle = [-20, -10, 0, 10, 20]
    translate_x = [-15, -10, 0, 10, 15]
    translate_y = [-15, -10, 0, 10, 15]

    angle = random.choice(rotatation_angle)
    tx = random.choice(translate_x)
    ty = random.choice(translate_y)

    rows, cols = im.shape
    M_rotate = cv2.getRotationMatrix2D((cols/2,rows/2),angle,1)

    M_translate = np.float32([[1,0,tx],[0,1,ty]])
    im = cv2.warpAffine(im, M_translate,(cols,rows))
    label = cv2.warpAffine(label,M_translate,(cols,rows))

    im = cv2.warpAffine(im,M_rotate,(cols,rows))
    label = cv2.warpAffine(label, M_rotate,(cols,rows))

    return im, label

def augmentate(self):
        angles = [45, 90, 135, 180, 225, 270, 315]
        scale = 1.0
        for img in self.images:
            print "image shape : ", img.shape
            w = img.shape[1]
            h = img.shape[0]
            img_vmirror = cv2.flip(img,1)
            skimage.io.imsave("testv"+".jpg", img_vmirror )
            for angle in angles:
            #rangle = np.deg2rad(angle)
            # nw = (abs(np.sin(rangle)*h) + abs(np.cos(rangle)*w))*scale
            # nh = (abs(np.cos(rangle)*h) + abs(np.sin(rangle)*w))*scale
                rot_mat = cv2.getRotationMatrix2D((w*0.5, h*0.5), angle, scale)
            # rot_move = np.dot(rot_mat, np.array([(nw-w)*0.5, (nh-h)*0.5,0]))
            # rot_mat[0,2] += rot_move[0]
            # rot_mat[1,2] += rot_move[1]
                new_img = cv2.warpAffine(img, rot_mat, (int(math.ceil(w)), int(math.ceil(h))), flags=cv2.INTER_LANCZOS4)
                skimage.io.imsave("test"+str(angle)+".jpg", new_img)
                new_img_vmirror = cv2.flip(new_img, 1)
                skimage.io.imsave("testv"+str(angle)+".jpg", new_img_vmirror)
                # img_rmirror = cv2.flip(new_img, 0)
                # skimage.io.imsave("testh"+str(angle)+".jpg", img_rmirror)

def load_and_augmentate(self, root):
        angles = [45, 90, 135, 180, 225, 270, 315]
        scale = 1.0
        for img_dir in os.listdir(root):
            img_dir_path = os.path.join(root, img_dir)
            for img in os.listdir(img_dir_path):
                img_path = os.path.join(img_dir_path, img)
                image = caffe.io.load_image(img_path,color=True)
                w = image.shape[1]
                h = image.shape[0]
                img_name = img.split(".")[0]
                img_type = img.split(".")[-1]
                img_vmirror = cv2.flip(image,1)
                img_vmirror_path = os.path.join(img_dir_path,img_name+"_v."+img_type)
                skimage.io.imsave(img_vmirror_path, img_vmirror )
                for angle in angles:
                    rot_mat = cv2.getRotationMatrix2D((w*0.5, h*0.5), angle, scale)
                    new_img = cv2.warpAffine(image, rot_mat, (int(math.ceil(w)), int(math.ceil(h))), flags=cv2.INTER_LANCZOS4)
                    new_img_path = os.path.join(img_dir_path,img_name+"_"+str(angle)+"."+img_type)
                    skimage.io.imsave(new_img_path, new_img)
                    new_img_vmirror = cv2.flip(new_img, 1)
                    new_img_vmirror_path = os.path.join(img_dir_path, img_name+"_"+str(angle)+"_v."+img_type)
                    skimage.io.imsave(new_img_vmirror_path, new_img_vmirror)

def rotate_image(img, angle, crop):
    h, w = img.shape[:2]
    angle %= 360
    M_rotate = cv2.getRotationMatrix2D((w/2, h/2), angle, 1)
    img_rotated = cv2.warpAffine(img, M_rotate, (w, h))

    if crop:
        angle_crop = angle % 180
        if angle_crop > 90:
            angle_crop = 180 - angle_crop
        theta = angle_crop * np.pi / 180.0
        hw_ratio = float(h) / float(w)
        tan_theta = np.tan(theta)
        numerator = np.cos(theta) + np.sin(theta) * tan_theta
        r = hw_ratio if h > w else 1 / hw_ratio
        denominator = r * tan_theta + 1
        crop_mult = numerator / denominator
        w_crop = int(round(crop_mult*w))
        h_crop = int(round(crop_mult*h))
        x0 = int((w-w_crop)/2)
        y0 = int((h-h_crop)/2)

        img_rotated = crop_image(img_rotated, x0, y0, w_crop, h_crop)

    return img_rotated

def create_image_matrix(self, degrees=180):
        """
        This creates a 3d matrix of an image with rotations acting in the xy plane
        This code is not yet integrated into the menu, but it works. It needs
        to be able to take user text input to create transformation matrices that 
        can act on any volume data.
        """

        width = self.matrix_size
        rows,cols = self.img_cp.shape   #Image cp is the compressed image. 
        v = np.zeros((width, width, width))


        for z in range(width):
            M = cv2.getRotationMatrix2D((cols/2,rows/2),z*degrees/width,1)      #This finds the rotation matirx
            dyn_img = cv2.resize(image, (int(np.cos(z/width)*width+10), width-z+10))        #Resizes the image throughout the z axis based on a mathematical function.
            dst = cv2.warpAffine(dyn_img, M,(cols/2,rows/2))                    #This applies the rotation matrix to the image.

            v[:][z][:] += cv2.warpAffine(dyn_img,M,(cols,rows)) 

        v = np.lib.pad(v, ((1,1),(1,1),(1,1)), 'constant') #This padds the z axis with zero's arrays so that a closed shape is produced by create_iso_surface.
        return v

def _rotate_image(self, mat, angle, width, height):
        big = max(width, height)
        small = min(width, height)
        center = (big / 2.0) - (small / 2.0)

        trans = numpy.float32([[1, 0, 0], [0, 1, 0]])
        trans2 = numpy.float32([[1, 0, 0], [0, 1, 0]])

        if small == width:
            trans[0, 2] = center
            trans2[1, 2] = -center - 1
        else:
            trans[1, 2] = center
            trans2[0, 2] = -center - 1

        # first enlarge the image to a square, translating the pixels to the new center
        mat = cv2.warpAffine(mat, trans, (big, big))
        # then rotate on the new center
        rot = cv2.getRotationMatrix2D((big / 2, big / 2), angle, 1)
        mat = cv2.warpAffine(mat, rot, (big, big))
        # finally translate back to the start and resize to the new size
        return cv2.warpAffine(mat, trans2, (height, width))

def rotate_image(img_src, angle,scale ,crop=True):
    img_src,size_dest= pad_image(img_src,scale)

    size = tuple(np.array([img_src.shape[1], img_src.shape[0]]))
    org_h=size[1]
    org_w=size[0]

    src_r = np.sqrt((size[0]/2.0)**2+(size[1]/2.0)**2)
    org_angle =np.arctan(float(org_h)/org_w)

    dest_h = size_dest[0]
    dest_w = size_dest[1]

    center = tuple(np.array([img_src.shape[1] * 0.5, img_src.shape[0] * 0.5]))

    dsize= (dest_w,dest_h)
    rotation_matrix = cv2.getRotationMatrix2D(center, angle, scale)
    img_rot = cv2.warpAffine(img_src, rotation_matrix, size, flags=cv2.INTER_CUBIC)

    if crop:
        x,y,w,h = cv2.boundingRect(img_rot[:,:,3])
        return img_rot[y:y+h, x:x+w,:]
    else:
        return img_rot

def rotate_image(img_src, angle,scale ):
    img_src,size_dest= pad_image(img_src,scale)

    size = tuple(np.array([img_src.shape[1], img_src.shape[0]]))
    org_h=size[1]
    org_w=size[0]

    src_r = np.sqrt((size[0]/2.0)**2+(size[1]/2.0)**2)
    org_angle =np.arctan(float(org_h)/org_w)

    dest_h = size_dest[0]
    dest_w = size_dest[1]

    center = tuple(np.array([img_src.shape[1] * 0.5, img_src.shape[0] * 0.5]))

    dsize= (dest_w,dest_h)
    rotation_matrix = cv2.getRotationMatrix2D(center, angle, scale)
    img_rot = cv2.warpAffine(img_src, rotation_matrix, size, flags=cv2.INTER_CUBIC)

    x,y,w,h = cv2.boundingRect(img_rot[:,:,3])
    return img_rot[y:y+h, x:x+w,:]

def matrixPicture(face, eyes, height, width):
    """calculation of rotation and movement of the image"""
    center = tuple((face[0] + (face[2] / 2), face[1] + (face[3] / 2)))

    moveMatrix = np.float32([[1, 0, (width / 2) - center[0]],
                             [0, 1, (height / 2) - center[1]]])

    scale = float(min(height, width)) / float(face[2]) * facescale

    eye1 = tuple((eyes[0][0] + (eyes[0][2] / 2),
                  eyes[0][1] + (eyes[0][3] / 2)))
    eye2 = tuple((eyes[1][0] + (eyes[1][2] / 2),
                  eyes[1][1] + (eyes[1][3] / 2)))

    x = (float(eye2[0]) - float(eye1[0]))
    y = (float(eye2[1]) - float(eye1[1]))

    if x == 0:
        angle = 0
    else:
        angle = atan(y / x) * 180 / pi

    rotMatrix = cv2.getRotationMatrix2D(center, angle, scale)

    return moveMatrix, rotMatrix

def _scale(image, min=0.9, max=1.1):
    '''
    Scale the input image by a random factor picked from a uniform distribution
    over [min, max].

    Returns:
        The scaled image, the associated warp matrix, and the scaling value.
    '''

    rows,cols,ch = image.shape

    #Randomly select a scaling factor from the range passed.
    scale = np.random.uniform(min, max)

    M = cv2.getRotationMatrix2D((cols/2,rows/2), 0, scale)
    return cv2.warpAffine(image, M, (cols, rows)), M, scale

def random_rotate(w,h,angle,scale,*all_inputs):
    if type(angle)==float:
        angle=(-angle,angle)
    if type(scale)==float:
        scale=(1-scale,1+scale)
    cx=(np.random.rand(len(all_inputs[0])).astype(floatX))*w
    cy=(np.random.rand(len(all_inputs[0])).astype(floatX))*h
    actions=(np.random.rand(len(all_inputs[0]),4,1,1)).astype(floatX)
    actions2=np.zeros_like(actions)
    actions2[:,0]=(actions[:,0]*(angle[1]-angle[0])+angle[0]).astype(floatX)
    actions2[:,1]=(actions[:,1]*(scale[1]-scale[0])+scale[0]).astype(floatX)
    actions2[:,2,0,0]=cx
    actions2[:,3,0,0]=cy
    all_outputs=[]
    for inputs in all_inputs:
        outputs=np.zeros(inputs.shape,dtype=floatX)
        for i in range(len(inputs)):
            mat = cv2.getRotationMatrix2D((cx[i],cy[i]),actions2[i,0,0,0],actions2[i,1,0,0])
            tmp = cv2.warpAffine(inputs[i].transpose(1,2,0),mat,inputs[i].shape[1:]).transpose(2,0,1)
            #tmp=np.pad(inputs[i:i+1],((0,0),(0,0),(n,n),(n,n)),mode='constant',constant_values=0)
            #tmp=np.roll(tmp,actions2[i,0,0,0],2)
            #tmp=np.roll(tmp,actions2[i,1,0,0],3)
            outputs[i]=tmp
        all_outputs+=[outputs]
    return all_outputs+[actions2.reshape(len(inputs),4)]

def dumpRotateImage(img,degree,pt1,pt2,pt3,pt4):
    height,width=img.shape[:2]
    heightNew = int(width * fabs(sin(radians(degree))) + height * fabs(cos(radians(degree))))
    widthNew = int(height * fabs(sin(radians(degree))) + width * fabs(cos(radians(degree))))
    matRotation=cv2.getRotationMatrix2D((width/2,height/2),degree,1)
    matRotation[0, 2] += (widthNew - width) / 2
    matRotation[1, 2] += (heightNew - height) / 2
    imgRotation = cv2.warpAffine(img, matRotation, (widthNew, heightNew), borderValue=(255, 255, 255))
    pt1 = list(pt1)
    pt3 = list(pt3)


    [[pt1[0]], [pt1[1]]] = np.dot(matRotation, np.array([[pt1[0]], [pt1[1]], [1]]))
    [[pt3[0]], [pt3[1]]] = np.dot(matRotation, np.array([[pt3[0]], [pt3[1]], [1]]))
    imgOut=imgRotation[int(pt1[1]):int(pt3[1]),int(pt1[0]):int(pt3[0])]
    height,width=imgOut.shape[:2]
    return imgOut

def random_rotate_img(img, chance, min_angle, max_angle):
    import cv2
    if random.random() > chance:
        return img
    if not isinstance(img, list):
        img = [img]

    angle = random.randint(min_angle, max_angle)
    center = (img[0].shape[0] / 2, img[0].shape[1] / 2)
    rot_matrix = cv2.getRotationMatrix2D(center, angle, scale=1.0)

    res = []
    for img_inst in img:
        img_inst = cv2.warpAffine(img_inst, rot_matrix, dsize=img_inst.shape[:2], borderMode=cv2.BORDER_CONSTANT)
        res.append(img_inst)
    if len(res) == 0:
        res = res[0]
    return res

def create_rotated_sub_image(image, centre, search_width, angle_rad):
    # Rotation transform requires x then y.
    M = cv2.getRotationMatrix2D((centre[1], centre[0]), np.rad2deg(angle_rad), 1.0)

    w = image.shape[1]
    h = centre[0] + int((image.shape[0] - centre[0]) * abs(math.sin(angle_rad)))
    rotated = cv2.warpAffine(image, M, (w, h))

    # Centre the last white centroid into the centre of the image.
    half_sub_image_width = int(min(min(search_width, centre[1]),
                                   min(rotated.shape[1] - centre[1], search_width)))

    sub_image = rotated[centre[0]:,
                centre[1] - half_sub_image_width: centre[1] + half_sub_image_width]

    return sub_image

def rotate_bound(image, angle):
    # grab the dimensions of the image and then determine the
    # center
    (h, w) = image.shape[:2]
    (cX, cY) = (w // 2, h // 2)

    # grab the rotation matrix (applying the negative of the
    # angle to rotate clockwise), then grab the sine and cosine
    # (i.e., the rotation components of the matrix)
    M = cv2.getRotationMatrix2D((cX, cY), -angle, 1.0)
    cos = np.abs(M[0, 0])
    sin = np.abs(M[0, 1])

    # compute the new bounding dimensions of the image
    nW = int((h * sin) + (w * cos))
    nH = int((h * cos) + (w * sin))

    # adjust the rotation matrix to take into account translation
    M[0, 2] += (nW / 2) - cX
    M[1, 2] += (nH / 2) - cY

    # perform the actual rotation and return the image
    return cv2.warpAffine(image, M, (nW, nH))

def _random_roate(self, images, labels, degree):
        if(images.shape[0] != labels.shape[0]):
            raise Exception("Batch size Error.")
        degree = degree * math.pi / 180
        rand_degree = np.random.uniform(-degree, degree, images.shape[0])

        o_images = np.zeros_like(images)
        o_labels = np.zeros_like(labels)
        for idx in xrange(images.shape[0]):
            theta = rand_degree[idx]

            # labels
            for ii in xrange(self.points_num):
                o_labels[idx, 2*ii: 2*ii+2] = self._rotate(labels[idx, ii*2: 2*ii+2], theta)

            # image
            M = cv2.getRotationMatrix2D((self.img_width/2,self.img_height/2),-theta*180/math.pi,1)
            o_images[idx] = np.expand_dims(cv2.warpAffine(images[idx],M,(self.img_width,self.img_height)), axis=2)

        return o_images, o_labels

def _batch_random_roate(self, images, labels, degree):
        if(images.shape[0] != labels.shape[0]):
            raise Exception("Batch size Error.")
        degree = degree * math.pi / 180
        rand_degree = np.random.uniform(-degree, degree)

        o_images = np.zeros_like(images)
        o_labels = np.zeros_like(labels)
        for idx in xrange(images.shape[0]):
            theta = rand_degree

            # labels
            for ii in xrange(self.points_num):
                o_labels[idx, 2*ii: 2*ii+2] = self._rotate(labels[idx, ii*2: 2*ii+2], theta)

            # image
            M = cv2.getRotationMatrix2D((self.img_width/2,self.img_height/2),-theta*180/math.pi,1)
            o_images[idx] = np.expand_dims(cv2.warpAffine(images[idx],M,(self.img_width,self.img_height)), axis=2)

        return o_images, o_labels

def rotate_oriented_bbox_to_horizontal(center, bbox):
    """
    Step 2 of Figure 5 in seglink paper

    Rotate bbox horizontally along a `center` point
    Args:
        center: the center of rotation
        bbox: [cx, cy, w, h, theta]
    """
    assert np.shape(center) == (2, ), "center must be a vector of length 2"
    assert np.shape(bbox) == (5, ) or np.shape(bbox) == (4, ), "bbox must be a vector of length 4 or 5"
    bbox = np.asarray(bbox.copy(), dtype = np.float32)

    cx, cy, w, h, theta = bbox;
    M = cv2.getRotationMatrix2D(center, theta, scale = 1) # 2x3

    cx, cy = np.dot(M, np.transpose([cx, cy, 1]))

    bbox[0:2] = [cx, cy] 
    return bbox

def rotate_horizontal_bbox_to_oriented(center, bbox):
    """
    Step 4 of Figure 5 in seglink paper: 
        Rotate the cropped horizontal bbox back to its original direction
    Args:
        center: the center of rotation
        bbox: [cx, cy, w, h, theta]
    Return: the oriented bbox
    """
    assert np.shape(center) == (2, ), "center must be a vector of length 2"
    assert np.shape(bbox) == (5, ) , "bbox must be a vector of length 4 or 5"
    bbox = np.asarray(bbox.copy(), dtype = np.float32)

    cx, cy, w, h, theta = bbox;
    M = cv2.getRotationMatrix2D(center, -theta, scale = 1) # 2x3
    cx, cy = np.dot(M, np.transpose([cx, cy, 1]))
    bbox[0:2] = [cx, cy]
    return bbox

def rotate_about_center(src, angle, scale=1.):
    if angle == 0:
        return src

    w = src.shape[1]
    h = src.shape[0]
    rangle = np.deg2rad(angle)  # angle in radians
    # now calculate new image width and height
    nw = (abs(np.sin(rangle)*h) + abs(np.cos(rangle)*w))*scale
    nh = (abs(np.cos(rangle)*h) + abs(np.sin(rangle)*w))*scale
    # ask OpenCV for the rotation matrix
    rot_mat = cv2.getRotationMatrix2D((nw*0.5, nh*0.5), angle, scale)
    # calculate the move from the old center to the new center combined
    # with the rotation
    rot_move = np.dot(rot_mat, np.array([(nw-w)*0.5, (nh-h)*0.5,0]))
    # the move only affects the translation, so update the translation
    # part of the transform
    rot_mat[0,2] += rot_move[0]
    rot_mat[1,2] += rot_move[1]
    return cv2.warpAffine(src, rot_mat, (int(math.ceil(nw)), int(math.ceil(nh))), flags=cv2.INTER_LANCZOS4)

#????????

def rotate_2d(img, angle_in_degrees,random_mode=True, probability=0.5):
    if random_mode:
        if random.random() < probability:
            return img

    rot_mat = cv.getRotationMatrix2D(tuple(np.array(img.shape)/2), angle, 1.0)
    return apply_affine(img, rot_mat)

def findCorners(contour):
    """blank_image = np.zeros((img.shape[0],img.shape[1],3), np.uint8)
    cv2.drawContours(blank_image, contour, -1, (255, 255, 255))
    rows,cols = img.shape[0], img.shape[1]
    M = cv2.getRotationMatrix2D((cols/2,rows/2),-45,0.5)
    dst = cv2.warpAffine(blank_image,M,(cols,rows))
    cv2.imshow("rotatio", dst)
    cv2.waitKey()"""
    rect = cv2.minAreaRect(contour)
    box = cv2.boxPoints(rect)
    box = np.int0(box)
    height_px_1 = box[0][1] - box[3][1]
    height_px_2 = box[1][1] - box[2][1]
    print height_px_1, height_px_2
    if height_px_1 < height_px_2:
        close_height_px = height_px_2
        far_height_px = height_px_1
    else:
        close_height_px = height_px_1
        far_height_px = height_px_2

    return close_height_px, far_height_px

def rotate_bound(image, angle):
    # grab the dimensions of the image and then determine the
    # center
    (h, w) = image.shape[:2]
    (cX, cY) = (w // 2, h // 2)

    # grab the rotation matrix (applying the negative of the
    # angle to rotate clockwise), then grab the sine and cosine
    # (i.e., the rotation components of the matrix)
    M = cv2.getRotationMatrix2D((cX, cY), -angle, 1.0)
    cos = np.abs(M[0, 0])
    sin = np.abs(M[0, 1])

    # compute the new bounding dimensions of the image
    nW = int((h * sin) + (w * cos))
    nH = int((h * cos) + (w * sin))

    # adjust the rotation matrix to take into account translation
    M[0, 2] += (nW / 2) - cX
    M[1, 2] += (nH / 2) - cY

    # perform the actual rotation and return the image
    return cv2.warpAffine(image, M, (nW, nH))

def create_design_data_set(labeled_designs,design_crop_dir,image_dir,test):
    labels = ['heads','tails']
    if test:
        pixels_to_jitter = 0
        angles = 1
    else:
        pixels_to_jitter = 2
        angles = 100

    for label in labels:
        dir = image_dir + label + '/'
        if not os.path.exists(dir):
            os.makedirs(dir)

    for coin_id, label in labeled_designs.iteritems():
        before_rotate_size = 56
        for image_id in range(0,56):
            #dir = design_crop_dir + str(coin_id / 100) + '/'
            class_dir = image_dir + label + '/'
            #for angle in range(0,10):
            filename = str(coin_id).zfill(5) + str(image_id).zfill(2) + '.png'
            image = cv2.imread(design_crop_dir + filename)
            image = cv2.resize(image, (before_rotate_size, before_rotate_size), interpolation=cv2.INTER_AREA)
            for count in range(0,angles):
                angle = random.random() * 360
                center_x = before_rotate_size / 2 + (random.random() * pixels_to_jitter * 2) - pixels_to_jitter
                center_y = before_rotate_size / 2 + (random.random() * pixels_to_jitter * 2) - pixels_to_jitter
                rot_image = image.copy()
                m = cv2.getRotationMatrix2D((center_x, center_y), angle, 1)
                cv2.warpAffine(rot_image, m, (before_rotate_size, before_rotate_size), rot_image, cv2.INTER_CUBIC)
                # This is hard coded for 28x28.
                rot_image = cv2.resize(rot_image, (41, 41), interpolation=cv2.INTER_AREA)
                rot_image = rot_image[6:34, 6:34]
                rotated_filename = filename.replace('.png', str(count).zfill(2) + '.png')
                cv2.imwrite(class_dir + rotated_filename,rot_image)
    sys.exit()

def get_rotated_crop(crop_dir, crop_id, crop_size, angle):
    filename = get_filename_from(crop_id,crop_dir)
    crop = cv2.imread(filename)
    if crop == None:
        print crop_id, 'None'
        return None

    crop = cv2.resize(crop, (crop_size, crop_size), interpolation=cv2.INTER_AREA)
    if angle == None:
        angle = 0

    print crop_dir, crop_id, crop_size, angle
    m = cv2.getRotationMatrix2D((crop_size / 2, crop_size / 2), angle, 1)
    cv2.warpAffine(crop, m, (crop_size, crop_size), crop, cv2.INTER_CUBIC)
    return crop

def rotate_about_center(src, angle, scale=1.):
    w = src.shape[1]
    h = src.shape[0]
    rangle = np.deg2rad(angle)  # angle in radians
    nw = (abs(np.sin(rangle)*h) + abs(np.cos(rangle)*w))*scale
    nh = (abs(np.cos(rangle)*h) + abs(np.sin(rangle)*w))*scale
    rot_mat = cv2.getRotationMatrix2D((nw*0.5, nh*0.5), angle, scale)
    rot_move = np.dot(rot_mat, np.array([(nw-w)*0.5, (nh-h)*0.5,0]))
    rot_mat[0,2] += rot_move[0]
    rot_mat[1,2] += rot_move[1]
    return cv2.warpAffine(src, rot_mat, (int(math.ceil(nw)), int(math.ceil(nh))), flags=cv2.INTER_LANCZOS4)

def get_normalized_image(img, rr, debug = False):

  box = cv2.boxPoints(rr)
  extbox = cv2.boundingRect(box)

  if extbox[2] *  extbox[3] > img.shape[0] * img.shape[1]:
    print("Too big proposal: {0}x{1}".format(extbox[2], extbox[3]))
    return None, None
  extbox = [extbox[0], extbox[1], extbox[2], extbox[3]]
  extbox[2] += extbox[0]
  extbox[3] += extbox[1]
  extbox = np.array(extbox, np.int)

  extbox[0] = max(0, extbox[0])
  extbox[1] = max(0, extbox[1])
  extbox[2] = min(img.shape[1], extbox[2])
  extbox[3] = min(img.shape[0], extbox[3])

  tmp = img[extbox[1]:extbox[3], extbox[0]:extbox[2]]
  center = (tmp.shape[1] / 2,  tmp.shape[0] / 2)
  rot_mat = cv2.getRotationMatrix2D( center, rr[2], 1 )

  if tmp.shape[0] == 0 or tmp.shape[1] == 0:
    return None, rot_mat

  if debug:
    vis.draw_box_points(img,  np.array(extbox, dtype="int"), color = (0, 255, 0))
    cv2.imshow('scaled', img)

  rot_mat[0,2] += rr[1][0] /2.0 - center[0]
  rot_mat[1,2] += rr[1][1] /2.0 - center[1]
  try:
    norm_line = cv2.warpAffine( tmp, rot_mat, (int(rr[1][0]), int(rr[1][1])), borderMode=cv2.BORDER_REPLICATE )
  except:
    return None, rot_mat
  return norm_line, rot_mat