Python cv2.CHAIN_APPROX_NONE属性代码示例

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def mask2poly_single(binary_mask):
    """

    :param binary_mask:
    :return:
    """
    try:
        contours, hierarchy = cv2.findContours(binary_mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
        # contour_lens = np.array(list(map(len, contours)))
        # max_id = contour_lens.argmax()
        # max_contour = contours[max_id]
        max_contour = max(contours, key=len)
        rect = cv2.minAreaRect(max_contour)
        poly = cv2.boxPoints(rect)
        # poly = TuplePoly2Poly(poly)
    except:
        import pdb
        pdb.set_trace()
    return poly 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def vis_mask(img, mask, bbox_color, show_parss=False):
    """Visualizes a single binary mask."""
    img = img.astype(np.float32)
    idx = np.nonzero(mask)

    border_color = cfg.VIS.SHOW_SEGMS.BORDER_COLOR
    border_thick = cfg.VIS.SHOW_SEGMS.BORDER_THICK

    mask_color = bbox_color if cfg.VIS.SHOW_SEGMS.MASK_COLOR_FOLLOW_BOX else _WHITE
    mask_color = np.asarray(mask_color)
    mask_alpha = cfg.VIS.SHOW_SEGMS.MASK_ALPHA

    _, contours, _ = cv2.findContours(mask.copy(), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)
    if cfg.VIS.SHOW_SEGMS.SHOW_BORDER:
        cv2.drawContours(img, contours, -1, border_color, border_thick, cv2.LINE_AA)

    if cfg.VIS.SHOW_SEGMS.SHOW_MASK and not show_parss:
        img[idx[0], idx[1], :] *= 1.0 - mask_alpha
        img[idx[0], idx[1], :] += mask_alpha * mask_color

    return img.astype(np.uint8) 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def vis_parsing(img, parsing, colormap, show_segms=True):
    """Visualizes a single binary parsing."""
    img = img.astype(np.float32)
    idx = np.nonzero(parsing)

    parsing_alpha = cfg.VIS.SHOW_PARSS.PARSING_ALPHA
    colormap = colormap_utils.dict2array(colormap)
    parsing_color = colormap[parsing.astype(np.int)]

    border_color = cfg.VIS.SHOW_PARSS.BORDER_COLOR
    border_thick = cfg.VIS.SHOW_PARSS.BORDER_THICK

    img[idx[0], idx[1], :] *= 1.0 - parsing_alpha
    # img[idx[0], idx[1], :] += alpha * parsing_color
    img += parsing_alpha * parsing_color

    if cfg.VIS.SHOW_PARSS.SHOW_BORDER and not show_segms:
        _, contours, _ = cv2.findContours(parsing.copy(), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)
        cv2.drawContours(img, contours, -1, border_color, border_thick, cv2.LINE_AA)

    return img.astype(np.uint8) 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def diff_rect(img1, img2, pos=None):
    """find counters include pos in differences between img1 & img2 (cv2 images)"""
    diff = cv2.absdiff(img1, img2)
    diff = cv2.GaussianBlur(diff, (3, 3), 0)
    edges = cv2.Canny(diff, 100, 200)
    _, thresh = cv2.threshold(edges, 0, 255, cv2.THRESH_BINARY)
    contours, _ = cv2.findContours(thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_NONE)
    if not contours:
        return None
    contours.sort(key=lambda c: len(c))
    # no pos provide, just return the largest different area rect
    if pos is None:
        cnt = contours[-1]
        x0, y0, w, h = cv2.boundingRect(cnt)
        x1, y1 = x0+w, y0+h
        return (x0, y0, x1, y1)
    # else the rect should contain the pos
    x, y = pos
    for i in range(len(contours)):
        cnt = contours[-1-i]
        x0, y0, w, h = cv2.boundingRect(cnt)
        x1, y1 = x0+w, y0+h
        if x0 <= x <= x1 and y0 <= y <= y1:
            return (x0, y0, x1, y1) 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def sobelSecSearchPart(self, bound, refpoint, out):
        bound_threshold = self.sobelOperT(bound, 3, 6, 2)

        tempBoundThread = bound_threshold.copy()
        clearLiuDingOnly(tempBoundThread)

        posLeft, posRight, flag = bFindLeftRightBound(tempBoundThread)
        if flag:
            if posRight != 0 and posLeft != 0 and posLeft < posRight:
                posY = int(bound_threshold.shape[0] * 0.5)
                for i in range(posLeft + int(bound_threshold.shape[0] * 0.1), posRight - 4):
                    bound_threshold[posY, i] = 255
            for i in range(bound_threshold.shape[0]):
                bound_threshold[i, posLeft] = 0
                bound_threshold[i, posRight] = 0

        _, contours, _ = cv2.findContours(bound_threshold, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
        for it in contours:
            mr = cv2.minAreaRect(it)
            if self.verifySizes(mr):
                tmp = (mr[0][0] + refpoint[0], mr[0][1] + refpoint[1])
                out.append((tmp, mr[1], mr[2])) 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def sobelFrtSearch(self, src):
        out_rects = []

        src_threshold = self.sobelOper(src, self.m_GaussianBlurSize, self.m_MorphSizeWidth, self.m_MorphSizeHeight)
        _, contours, _ = cv2.findContours(src_threshold, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)

        for it in contours:
            mr = cv2.minAreaRect(it)

            if self.verifySizes(mr):
                safeBoundRect, flag = self.calcSafeRect(mr, src)
                if not flag:
                    continue
                out_rects.append(safeBoundRect)

        return out_rects 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def colorSearch(self, src, color, out_rect):
        """

        :param src:
        :param color:
        :param out_rect: minAreaRect
        :return: binary
        """
        color_morph_width = 10
        color_morph_height = 2

        match_gray = colorMatch(src, color, False)

        _, src_threshold = cv2.threshold(match_gray, 0, 255, cv2.THRESH_OTSU + cv2.THRESH_BINARY)

        element = cv2.getStructuringElement(cv2.MORPH_RECT, (color_morph_width, color_morph_height))
        src_threshold = cv2.morphologyEx(src_threshold, cv2.MORPH_CLOSE, element)

        out = src_threshold.copy()

        _, contours, _ = cv2.findContours(src_threshold, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)

        for cnt in contours:
            mr = cv2.minAreaRect(cnt)
            if self.verifySizes(mr):
                out_rect.append(mr)

        return out 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def get_single_centerpoint(self, mask):
        contour, _ = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_NONE)
        contour.sort(key=lambda x: cv2.contourArea(x), reverse=True) #only save the biggest one
        '''debug IndexError: list index out of range'''
        count = contour[0][:, 0, :]
        try:
            center = self.get_centerpoint(count)
        except:
            x,y = count.mean(axis=0)
            center=[int(x), int(y)]

        # max_points = 360
        # if len(contour[0]) > max_points:
        #     compress_rate = len(contour[0]) // max_points
        #     contour[0] = contour[0][::compress_rate, ...]
        return center, contour 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def get_single_centerpoint(self, mask):
        contour, _ = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_NONE)
        contour.sort(key=lambda x: cv2.contourArea(x), reverse=True)  # only save the biggest one

        '''debug IndexError: list index out of range'''
        count = contour[0][:, 0, :]
        try:
            center = self.get_centerpoint(count)
        except:
            x,y = count.mean(axis=0)
            center=[int(x), int(y)]
            
        #decrease the number of contour, to speed up
        # 360 points should ok, the performance drop very tiny.
        max_points = 360
        if len(contour[0]) > max_points:
            compress_rate = len(contour[0]) // max_points
            contour[0] = contour[0][::compress_rate, ...]
        return center, contour 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def vis_mask(img, mask, col, alpha=0.4, show_border=True, border_thick=2):
    """Visualizes a single binary mask."""

    img = img.astype(np.float32)
    idx = np.nonzero(mask)

    img[idx[0], idx[1], :] *= 1.0 - alpha
    img[idx[0], idx[1], :] += alpha * col

    if show_border:
        # How to use `cv2.findContours` in different OpenCV versions?
        # https://stackoverflow.com/questions/48291581/how-to-use-cv2-findcontours-in-different-opencv-versions/48292371#48292371
        contours = cv2.findContours(
            mask.copy(), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)[-2]
        cv2.drawContours(img, contours, -1, _WHITE, border_thick, cv2.LINE_AA)

    return img.astype(np.uint8) 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def _mask_post_processing(mask, center_pos, size, track_mask_threshold):
    target_mask = (mask > track_mask_threshold)
    target_mask = target_mask.astype(np.uint8)
    if cv2.__version__[-5] == '4':
        contours, _ = cv2.findContours(target_mask,
                                       cv2.RETR_EXTERNAL,
                                       cv2.CHAIN_APPROX_NONE)
    else:
        _, contours, _ = cv2.findContours(
                target_mask,
                cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
    cnt_area = [cv2.contourArea(cnt) for cnt in contours]
    if len(contours) != 0 and np.max(cnt_area) > 100:
        contour = contours[np.argmax(cnt_area)] 
        polygon = contour.reshape(-1, 2)
        prbox = cv2.boxPoints(cv2.minAreaRect(polygon))
        rbox_in_img = prbox
    else:  # empty mask
        location = cxy_wh_2_rect(center_pos, size)
        rbox_in_img = np.array([[location[0], location[1]],
                    [location[0] + location[2], location[1]],
                    [location[0] + location[2], location[1] + location[3]],
                    [location[0], location[1] + location[3]]])
    return rbox_in_img 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def draw_mask(im, mask, alpha=0.5, color=None, show_border=True,border_thick=1):
	"""
	Overlay a mask on top of the image.

	Args:
		im: a 3-channel uint8 image in BGR
		mask: a binary 1-channel image of the same size
		color: if None, will choose automatically
	"""
	if color is None:
		color = PALETTE_RGB[np.random.choice(len(PALETTE_RGB))][::-1]


	im = np.where(np.squeeze(np.repeat((mask > 0)[:, :, None], 3, axis=2)),
				  im * (1 - alpha) + color * alpha, im)
	if show_border:
		if cv2.__version__.startswith("2"):
			contours, _ = cv2.findContours(mask.copy(), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)
		else: # cv 3
			_,contours, _ = cv2.findContours(mask.copy(), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)
		cv2.drawContours(im, contours, -1, (255,255,255), border_thick, lineType=cv2.CV_AA)

	im = im.astype('uint8')
	return im 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def find_tissue_cnts(bw_img):
    """ Fint contours of tissues
    Parameters
    ----------
    bw_img : np.array
        2D binary image.
    Returns
    -------
    cnts: list
        List of all contours coordinates of tissues.
    """

    cnts, _ = cv2.findContours(img_as_ubyte(bw_img), mode=cv2.RETR_EXTERNAL,
                               method=cv2.CHAIN_APPROX_NONE)

    return cnts 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def find_marker_ellipses(im):
    im_gray = cvtColor(im, COLOR_BGR2GRAY)
    im_blur = GaussianBlur(im_gray, (3, 3), 0)
    ret, th = threshold(im_blur, 0, 255, THRESH_BINARY_INV + THRESH_OTSU)
    imgEdge, contours, hierarchy = findContours(th, RETR_TREE, CHAIN_APPROX_NONE)
    points = []
    origins = []
    ellipses = []
    id_point_candidates = []
    small_point_candidates = []
    for cnt in contours:
        if contour_sanity_check(cnt, im.shape[0], point_d=0.02):
            id_point_candidates.append(cnt)
        elif contour_sanity_check(cnt, im.shape[0], point_d=0.01):
            small_point_candidates.append(cnt)
    for cnt in id_point_candidates:
        x, y, w, h = boundingRect(cnt)
        ellipse = fitEllipse(cnt)
        points.append(im_gray[y:y + h, x:x + w])
        origins.append((x, y))
        ellipses.append(ellipse)
    return points, origins, ellipses 

# 需要导入模块: import cv2 [as 别名]
# 或者: from cv2 import CHAIN_APPROX_NONE [as 别名]
def _mask_post_processing(self, mask):
        target_mask = (mask > cfg.TRACK.MASK_THERSHOLD)
        target_mask = target_mask.astype(np.uint8)
        if cv2.__version__[-5] == '4':
            contours, _ = cv2.findContours(target_mask,
                                           cv2.RETR_EXTERNAL,
                                           cv2.CHAIN_APPROX_NONE)
        else:
            _, contours, _ = cv2.findContours(target_mask,
                                              cv2.RETR_EXTERNAL,
                                              cv2.CHAIN_APPROX_NONE)
        cnt_area = [cv2.contourArea(cnt) for cnt in contours]
        if len(contours) != 0 and np.max(cnt_area) > 100:
            contour = contours[np.argmax(cnt_area)]
            polygon = contour.reshape(-1, 2)
            prbox = cv2.boxPoints(cv2.minAreaRect(polygon))
            rbox_in_img = prbox
        else:  # empty mask
            location = cxy_wh_2_rect(self.center_pos, self.size)
            rbox_in_img = np.array([[location[0], location[1]],
                                    [location[0] + location[2], location[1]],
                                    [location[0] + location[2], location[1] + location[3]],
                                    [location[0], location[1] + location[3]]])
        return rbox_in_img