我试图通过使用模板匹配将2个图像拼接在一起找到3组点,我传递给cv2.getAffineTransform()
得到一个经线矩阵,我传递给cv2.warpAffine()
以对齐我的图像。
然而,当我加入我的图像时,我的大部分仿射图像都没有显示出来。我已经尝试过使用不同的技术来选择点,改变顺序或参数等等,但我只能得到一张瘦弱的图像来显示。
有人可以告诉我,我的方法是否有效,并建议我可能会出错?任何关于可能导致问题的猜测都将非常感激。提前致谢。
这是我得到的final result。这是原始图像(1,2)和我使用的代码:
编辑:这是变量trans
的结果
array([[ 1.00768049e+00, -3.76690353e-17, -3.13824885e+00],
[ 4.84461775e-03, 1.30769231e+00, 9.61912797e+02]])
以下是传递给cv2.getAffineTransform
的观点:unified_pair1
array([[ 671., 1024.],
[ 15., 979.],
[ 15., 962.]], dtype=float32)
unified_pair2
array([[ 669., 45.],
[ 18., 13.],
[ 18., 0.]], dtype=float32)
import cv2
import numpy as np
def showimage(image, name="No name given"):
cv2.imshow(name, image)
cv2.waitKey(0)
cv2.destroyAllWindows()
return
image_a = cv2.imread('image_a.png')
image_b = cv2.imread('image_b.png')
def get_roi(image):
roi = cv2.selectROI(image) # spacebar to confirm selection
cv2.waitKey(0)
cv2.destroyAllWindows()
crop = image_a[int(roi[1]):int(roi[1]+roi[3]), int(roi[0]):int(roi[0]+roi[2])]
return crop
temp_1 = get_roi(image_a)
temp_2 = get_roi(image_a)
temp_3 = get_roi(image_a)
def find_template(template, search_image_a, search_image_b):
ccnorm_im_a = cv2.matchTemplate(search_image_a, template, cv2.TM_CCORR_NORMED)
template_loc_a = np.where(ccnorm_im_a == ccnorm_im_a.max())
ccnorm_im_b = cv2.matchTemplate(search_image_b, template, cv2.TM_CCORR_NORMED)
template_loc_b = np.where(ccnorm_im_b == ccnorm_im_b.max())
return template_loc_a, template_loc_b
coord_a1, coord_b1 = find_template(temp_1, image_a, image_b)
coord_a2, coord_b2 = find_template(temp_2, image_a, image_b)
coord_a3, coord_b3 = find_template(temp_3, image_a, image_b)
def unnest_list(coords_list):
coords_list = [a[0] for a in coords_list]
return coords_list
coord_a1 = unnest_list(coord_a1)
coord_b1 = unnest_list(coord_b1)
coord_a2 = unnest_list(coord_a2)
coord_b2 = unnest_list(coord_b2)
coord_a3 = unnest_list(coord_a3)
coord_b3 = unnest_list(coord_b3)
def unify_coords(coords1,coords2,coords3):
unified = []
unified.extend([coords1, coords2, coords3])
return unified
# Create a 2 lists containing 3 pairs of coordinates
unified_pair1 = unify_coords(coord_a1, coord_a2, coord_a3)
unified_pair2 = unify_coords(coord_b1, coord_b2, coord_b3)
# Convert elements of lists to numpy arrays with data type float32
unified_pair1 = np.asarray(unified_pair1, dtype=np.float32)
unified_pair2 = np.asarray(unified_pair2, dtype=np.float32)
# Get result of the affine transformation
trans = cv2.getAffineTransform(unified_pair1, unified_pair2)
# Apply the affine transformation to original image
result = cv2.warpAffine(image_a, trans, (image_a.shape[1] + image_b.shape[1], image_a.shape[0]))
result[0:image_b.shape[0], image_b.shape[1]:] = image_b
showimage(result)
cv2.imwrite('result.png', result)