由于声誉问题，我无法发布图片，因此，这是我下载的图片的链接：
import cv2
import numpy as np
import matplotlib.pyplot as plt
image = cv2.imread(r'C:\Users\User\Desktop\shapes.png')
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
ret, thresh = cv2.threshold(gray, 200, 255, 0)
contours, hier = cv2.findContours(thresh, cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
for cnt in contours:
x,y,w,h = cv2.boundingRect(cnt)
shape = thresh[y:y+h,x:x+w]
plt.imshow(shape)
它只会返回一个轮廓，而不是您在图片中看到的6。
我做错了什么？
答案 0 :(得分：0)
ERROR at line 58:
ORA-06550: line 58, column 53:
PLS-00487: Invalid reference to variable 'FK'
ORA-06550: line 58, column 9:
PL/SQL: Statement ignored
ORA-06550: line 59, column 46:
PLS-00487: Invalid reference to variable 'FK'
ORA-06550: line 59, column 9:
PL/SQL: Statement ignored
在黑色背景下查找白色对象，因此您需要像这样设置阈值：
v_program_sec VARCHAR2(50);
cntr INTEGER :=0;
TYPE tab_name IS TABLE OF all_constraints.table_name%TYPE;
tab_names tab_name;
cursor all_cons is
select table_name
from ALL_CONSTRAINTS
where constraint_type = 'R'
and r_constraint_name =
(select constraint_name
from ALL_CONSTRAINTS
where constraint_type='P'
and table_name='POLICIES')
and table_name not in ('POLICY_AMOUNTS',
'POLICY_DATES','FUND_POLICIES',
'PNDNG_UW_REQUIREMENTS','RIDERS','TEMP_PARTIES',
'POLICY_AMOUNTS_HISTORY','AGREEMENTS','NFHST','VLRP_RIDER');
fk PLS_INTEGER;
procedure log_error
(p_err_cd IN NUMBER, p_err_msg IN VARCHAR2,
p_program_sec IN VARCHAR2, p_ref_num IN VARCHAR2)
is
begin
rollback;
insert into LOAD_ERROR_LOG
(err_cd, err_msg, program_sec, rec_hit)
values
(p_err_cd, p_err_msg, p_program_sec,
'VLDM1060 '||p_ref_num||to_char(SYSDATE,' hh24:mi mmddyyyy'));
commit;
end;
BEGIN
OPEN all_cons;
FETCH all_cons BULK COLLECT INTO tab_names;
-- existing policies
for infc_pol in
(select TEMP_POLICIES.*,
POLICIES.rowid p_rowid, POLICIES.status_cd p_status_cd
from POLICIES, TEMP_POLICIES
where POLICIES.policy_num = TEMP_POLICIES.policy_num
and TEMP_POLICIES.status_cd in ('0','1','2','3','4','5','6','7','8','L','Z')
order by POLICIES.rowid
)
loop
v_program_sec := 'Delete child records - INFC';
declare
del_cursor INTEGER;
exe_cursor INTEGER;
cntr INTEGER :=0;
begin
for fk IN 1..tab_names.count
loop
v_program_sec := 'Delete records from '||fk.table_name||' - INFC';
EXECUTE IMMEDIATE 'delete from '||fk.table_name||
' where pcy_policy_num = '||''''||infc_pol.policy_num||'''';
end loop;
v_program_sec := 'Delete records from RIDERS - INFC';
delete from RIDERS
where pcy_policy_num = infc_pol.policy_num;
v_program_sec := 'Delete records from PNDNG_UW_REQUIREMENTS - INFC';
delete from PNDNG_UW_REQUIREMENTS
where pcy_policy_num = infc_pol.policy_num;
v_program_sec := 'Delete records from POLICY_AMOUNTS - INFC';
delete from POLICY_AMOUNTS
where amt_code <> '10'
and pcy_policy_num = infc_pol.policy_num;
v_program_sec := 'Delete records from POLICY_DATES - INFC';
delete from POLICY_DATES
where daty_code not in ('01','03','04','17','18','20','21')
and pcy_policy_num = infc_pol.policy_num;
v_program_sec := 'Update policy record - INFC';
update POLICIES
set status_cd = infc_pol.status_cd,
paymnt_mode_cd = infc_pol.paymnt_mode_cd,
company_cd = infc_pol.company_cd,
fund_typ = infc_pol.fund_typ,
partcpng_ind = infc_pol.partcpng_ind,
distrb_cd = infc_pol.distrb_cd,
product_typ = infc_pol.product_typ,
restricted_ind = infc_pol.restricted_ind,
acct_exec_id = infc_pol.acct_exec_id,
rollover_ind = infc_pol.rollover_ind,
loan_ind = infc_pol.loan_ind,
cod_ind = infc_pol.cod_ind,
billng_mthd_cd = infc_pol.billng_mthd_cd,
db_option_cd = infc_pol.db_option_cd,
iss_state_cd = infc_pol.iss_state_cd,
reinsure_ind = infc_pol.reinsure_ind,
restrctns_ind = infc_pol.restrctns_ind,
tax_status_cd = infc_pol.tax_status_cd,
cvat_ind = infc_pol.cvat_ind,
plan_cd = infc_pol.plan_cd,
payor_grp_num = infc_pol.payor_grp_num,
last_update_dt = infc_pol.last_update_dt,
spec_risk_ind = infc_pol.spec_risk_ind
where policy_num = infc_pol.policy_num;
commit;
exception
when OTHERS then
declare
error_code NUMBER := SQLCODE;
error_msg VARCHAR2(300) := SQLERRM;
begin
log_error(error_code, error_msg, v_program_sec, infc_pol.policy_num);
end;
CLOSE all_cons;
end;
end loop;
-- new policies
begin
v_program_sec := 'insert new INFC policies from TEMP_POLICIES';
insert into policies
(policy_num, status_cd, paymnt_mode_cd, company_cd,
fund_typ, partcpng_ind, distrb_cd, product_typ,
restricted_ind, acct_exec_id, rollover_ind, loan_ind,
cod_ind, billng_mthd_cd, db_option_cd, iss_state_cd,
reinsure_ind, restrctns_ind, tax_status_cd, cvat_ind,
plan_cd, payor_grp_num, last_update_dt, spec_risk_ind)
select
policy_num, status_cd, paymnt_mode_cd, company_cd,
fund_typ, partcpng_ind, distrb_cd, product_typ,
restricted_ind, acct_exec_id, rollover_ind, loan_ind,
cod_ind, billng_mthd_cd, db_option_cd, iss_state_cd,
reinsure_ind, restrctns_ind, tax_status_cd, cvat_ind,
plan_cd, payor_grp_num, last_update_dt, spec_risk_ind
from TEMP_POLICIES tp
where not exists (select 'x'
from POLICIES
where policy_num = tp.policy_num)
and status_cd in ('0','1','2','3','4','5','6','7','8','L','Z');
commit;
exception
when OTHERS then
declare
error_code NUMBER := SQLCODE;
error_msg VARCHAR2(300) := SQLERRM;
begin
log_error(error_code, error_msg, v_program_sec, 'NEW');
end;
end;
end;```
，您需要找到这样的轮廓：
findContours()