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halcon边缘提取和缺陷检测常用方法；shape_trans算子的说明

由 爱⌒轻易说出口 提交于 2019-12-25 03:45:39
一、边缘提取 1、设置ROI兴趣区域 2、快速二值化，并连接相邻区域。 这样做的目的是进一步减少目标区域，通过二值化将目标区域大概轮廓提取出来 3、提取最接近目标区域的轮廓 常用函数有boundary，gen_contour_region_xld boundary （获取一个区域的边界） Region (input_object) Regions for which the boundary is to be computed. 区域 RegionBorder (output_object) Resulting boundaries. 输出的边界 BoundaryType (input_control) Boundary type.边界类型 Default value: 'inner' List of values: 'inner', 'inner_filled', 'outer' linner 内边界。 inner_filled 内边界上的孔。 outer 外边界。 gen_contour_region_xld （生成区域的XLD轮廓） 4、根据自需求提取需要的初步轮廓 5、将初步提取的初步轮廓进行膨胀操作 6、将膨胀后的区域和原图进行减操作（在这步之前有可能需要对原图进行高斯滤波）。这样就能得到只有边缘的真实图像 7、用canny或其他算子（根据需要）提取亚像素轮廓

MYSQL | ENCODE() outputs blob instead of text

由 北城余情 提交于 2019-12-25 03:13:56
问题 Im trying to encode a simple string by the ENCODE()-function. Using a string it gives me text as output. But using a field it gives me BLOB. How can I get around BLOB and output text for encoded fields? Here's what happens: SELECT ENCODE('myText,'myPw') - Output : baddade4b04e // Goal = This + using fieldname SELECT ENCODE(Field,'myPw') FROM myTable - Output : [BLOB - 14B] What I've tried: SELECT CAST(ENCODE(Field,'myPw') AS CHAR(1000) CHARACTER SET utf8) FROM myTable - Output : Empty rows!

Error in updating BLOB file

由 邮差的信 提交于 2019-12-25 03:08:23
问题 Code:- package jdbc; import java.io.File; import java.io.FileReader; import java.net.URL; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.util.Properties; public class Storing_Clob { public static void main(String[] args) throws Exception { DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); Properties p = new Properties(); p.put("user", "system"); p.put("password", "password"); Connection con = DriverManager

retrieve image in database mysql by using vb

由 纵然是瞬间 提交于 2019-12-25 02:33:20
问题 i want to retrieve image from database mysql in vb by using no id. but why i have error "Unable to cast object of type 'System.Byte[]' to type 'System.Drawing.Image'." this is my codding. i'm using visual basic 2008 and database mysql. picture format BLOB. eg.[BLOB - 22.1 KiB] Imports MySql.Data.MySqlClient Imports System.Drawing.Imaging Public Class Form_Popup Private Sub Form_Popup_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load objconn = New

Retrieve and displaying BLOB images from Mysql database with Tkinter

由 ▼魔方 西西 提交于 2019-12-25 02:19:12
问题 this def should connect to a database, and if the parameters are correct should retrieve a BLOB image, however i confused on how to display that image. currently, it will display all the other information besides the BLOB image that i want to be displayed. i realize that setting it to a stringvar is not correct. can anyone help with some clarity on how to get this to display in Tkinter? if not, is there any alternative solutions? func = Tkinter.Toplevel() func.title("blah") func.geometry(

Retrieve and displaying BLOB images from Mysql database with Tkinter

由 二次信任 提交于 2019-12-25 02:18:02
问题 this def should connect to a database, and if the parameters are correct should retrieve a BLOB image, however i confused on how to display that image. currently, it will display all the other information besides the BLOB image that i want to be displayed. i realize that setting it to a stringvar is not correct. can anyone help with some clarity on how to get this to display in Tkinter? if not, is there any alternative solutions? func = Tkinter.Toplevel() func.title("blah") func.geometry(

Pass MySQL medium blob into IOS NSData\UIImage

由 青春壹個敷衍的年華 提交于 2019-12-25 02:08:27
问题 In my PHP, I'm tying to send an array with data from the database. All values should be accepted as NSString exept one image that is stored as 'medium blob' in the database, and I'm trying to pass it's NSData\UIImage value. while ($row = mysql_fetch_array($result)) { $add = array(); $add["Id"] = $row["Id"]; $add["Mail"] = $row["Mail"]; $add["Category"] = $row["Category"]; $add["Phone"] = $row["Phone"]; $add["Msgs"] = $row["Msgs"]; //image from blob $add["Picture"] = $row["Picture"]; // push

Image is not displayed from Oracle table using servlet

由 与世无争的帅哥 提交于 2019-12-25 01:18:06
问题 After a long trial ,I finally successfully able to upload an image to an oracle database . At least my code says so. However to check whether the image has been successfully I wrote a servlet . After running the servlet I get a black screen in my browser and nothing else. The servlet code is: import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.sql.Blob; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement;

content key is not throwing values inside data

由 怎甘沉沦 提交于 2019-12-25 00:43:05
问题 I am trying to download a pdf document. but I am getting an error DOMException: Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded. if I debug my code I am getting undefined at the data.content console.log("data.content--->", data.content); but when I open data I am seeing value in content. data: content: "JVBERi0xLjJ6DTEgMCBvYmoNPDwNL0NyZWF0b3IgKFZpc2lvbm" contentInfo: {id: "a2c93187-5422-46c7-bcf7-e663c28dcd2e", externalId: "PVDR-85-625", source: "PCM",

How to count the number of occurrences of a particular word in a MySQL blob text?

由 半世苍凉 提交于 2019-12-24 23:33:29
问题 I have stored the contents of a text file in a MySQL table as a blob. I want to count the number of occurrences of a particular word from that text. Is there any way I can do that? 回答1: Try this SET @searchthis="lumia"; SELECT CAST((LENGTH(`documents`.`file`) - LENGTH(REPLACE(`documents`.`file`, @searchthis, ""))) / LENGTH(@searchthis) AS UNSIGNED ) AS searchthis_count FROM documents ; 来源： https://stackoverflow.com/questions/29454011/how-to-count-the-number-of-occurrences-of-a-particular-word
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