How to match edges of objects precisely?

Hi all
Okay, I have two objects, A and B, both with very irregular, jagged, edges. They should be contiguous and I want the edges to match exactly point for point, so when the border of A goes out, the border of B goes in. A is to the left of B, and A is above B in stacking order. I can do what I'm after by following this procedure, but I'm hoping there's a quicker, simpler method:
Drag right edge of A out so that it overlaps left edge of B.
Select A and B.
Choose Minus Back in Pathfinder palette (I get my desired border on A, but B is deleted).
Select A and copy.
Undo one step to get back B.
Delete A.
Paste new A in place.
Is there a better way?
Thanks.

No, it does exactly what Merge does! It produces two, objects matched at the originally overlapping edge of A and B. No third shape.
Just that Merge unites if the colors are identical, and Trim maintains the separate objects, even if the colors match. Both also remove strokes (annoying) and group the result (annoying).
You may be thinking of Divide? Or maybe the command Divide Objects below?

Similar Messages

How to match edges of objects precisely (2)?

I have come across an issue related to the previous one I posted (about matching the edges of two objects). In that case, the two objects were adjacent land blocks in a map. Now I am trying to match the border of a land block (in red in the example attached) with a river (the blue and white line). Ideally, I want the edge of the block to match the outside edge of the river because, if it lined up with the centre of the river, you wouldn't see the edge of the land block. By careful placement of points and editing of curves, I can get a reasonable match manually, but am I missing some handy automatic way of doing it? The example is purposely rough – the red line wshould abut the blue line perfectly, with no white in between.
Thanks in advance, Dominic

depends on how the illustration is compiled. ill explain as if the river is expanded and not a stroke. you can get this:
1:     Draw the land to deliberately overlap the river as so:
2:     Select the river and the land path you just drew. and using pathfinder/ minus back. Youll end up with something like this:
3:     command C to copy it then: command Z to undo, and delete the red path. Command F to paste altered path in place, Ungroup it delete the side you dont want and you should have this:
4:     Lastly stroke to the inside and whatever else you want and you are done.
G

How to match a fingerprint template from database ?

i now can save a fingerprint template from database using this code..
Dim fingerprintData As MemoryStream = New MemoryStream
Template.Serialize(fingerprintData)
fingerprintData.Position = 0
Dim br As BinaryReader = New BinaryReader(fingerprintData)
Dim bytes() As Byte = br.ReadBytes(CType(fingerprintData.Length, Int32))
Dim cmd As SqlCommand = New SqlCommand("INSERT INTO fininger_table VALUES(@FIRSTNAME, @LASTNAME, @FINGERPRINT)", conn)
cmd.Parameters.Add("FIRSTNAME", SqlDbType.VarChar).Value = CaptureForm.tboxFname.Text
cmd.Parameters.Add("LASTNAME", SqlDbType.VarChar).Value = CaptureForm.tboxLname.Text
cmd.Parameters.Add("FINGERPRINT", SqlDbType.Image).Value = bytes
conn.Open()
cmd.ExecuteNonQuery()
conn.Close()
and i fetch the data when the form is load..
conn.Open()
Dim cmd As New SqlCommand("SELECT * FROM Fininger_table", conn)
Dim rdr As SqlDataReader = cmd.ExecuteReader()
Dim MemStream As IO.MemoryStream
Dim fpBytes As Byte()
While rdr.Read()
fpBytes = rdr("FINGERPRINT")
MemStream = New IO.MemoryStream(fpBytes)
Dim template As New DPFP.Template(MemStream)
OnTemplate(template)
' template.DeSerialize(MemStream)
End While
rdr.Close()
conn.Close()
and now i'm stuck..i dont know how to match the fingerprint from the database to verify the user..
plz help me out..tnx in advance
btw im using a DIGITAL PERSONA FINGERPRINT READER..with the OTW SDK

Hello My dear Brother
I am zaid Ahmad khan would like to help you and this is the working code please see this and you will have the solution
Imports System.Data.SqlClient
Imports DPFP
Public Class Form1
Private WithEvents verifyControl As DPFP.Gui.Verification.VerificationControl
Private matcher As DPFP.Verification.Verification
Private matchResult As DPFP.Verification.Verification.Result
Private allReaderSerial As String = "00000000-0000-0000-0000-000000000000"
Public template As DPFP.Template
Private userTemplateColumn As String = "Template"
Private userIDColumn As String = "ID"
Dim bytes As Byte()
Private Sub CreateDPControl(ByRef control As DPFP.Gui.Verification.VerificationControl)
Try
control = New DPFP.Gui.Verification.VerificationControl()
control.AutoSizeMode = Windows.Forms.AutoSizeMode.GrowAndShrink
control.Name = "verifyControl"
control.Location = New System.Drawing.Point(0, 0)
control.ReaderSerialNumber = "00000000-0000-0000-0000-000000000000"
control.Visible = True
control.Enabled = True
control.BringToFront()
Me.Controls.Add(control)
Catch ex As Exception
MessageBox.Show("exception")
End Try
End Sub
Private Function ConnectString() As String
Dim connectionString As String
connectionString = "Server=localhost;database=bs;User ID=sa;Password=123"
Return connectionString
End Function
Private Sub VerifyBiometric_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
matcher = New Verification.Verification()
matchResult = New Verification.Verification.Result
CreateDPControl(verifyControl)
End Sub
Private Sub verifyControl_OnComplete(ByVal Control As Object, ByVal FeatureSet As DPFP.FeatureSet, ByRef EventHandlerStatus As DPFP.Gui.EventHandlerStatus) Handles verifyControl.OnComplete
Dim dataSet As DataSet = New DataSet()
Dim adapter As SqlDataAdapter = New SqlDataAdapter()
Dim sqlCommand As SqlCommand = New SqlCommand()
Dim ctr = 0
Try
Dim max As Integer = 0
Dim cn As New SqlConnection(ConnectString())
cn.Open()
sqlCommand.CommandText = "Select templateBytes7 from userthumbs where id='1029'"
sqlCommand.CommandType = CommandType.Text
sqlCommand.Connection = cn
Dim lrd As SqlDataReader = sqlCommand.ExecuteReader()
Dim usr
While lrd.Read()
usr = lrd("templateBytes7")
End While
bytes = Nothing
bytes = usr
template = New DPFP.Template()
template.DeSerialize(usr)
'Perform match
matcher.Verify(FeatureSet, template, matchResult)
If matchResult.Verified Then
EventHandlerStatus = Gui.EventHandlerStatus.Success
MsgBox("Verified!")
Me.Hide()
MessageBox.Show("Done")
Else
EventHandlerStatus = Gui.EventHandlerStatus.Failure
MsgBox("Please Try Again!")
End If
Finally
End Try
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
End Sub
End Class

How to create Authority check object

Hello Gurus,
How to create Authority-check object 'ZABC'
                                                         ID 'TABLE' FIELD 'ZTABLE'.
Please tell me detailed procedure.
Thanks in advance.
Best Regards,
zubera

Dear Zubera,
Creating Authorization Fields
In authorization objects, authorization fields represent the values to be tested during authorization checks.
To create authorization fields, choose Tools --> ABAP Workbench --> Development --> Other tools --> Authorization objects ® Fields.
To create a authorization field:
1. Choose Create authorization field.
2. On the next screen, enter the name of the field. Field names    must be unique and must begin with the letter Y or Z.
3. Assign a data element from the ABAP Dictionary to the field.
4. If desired, enter a check table for the possible entries. For    more information about check tables.
For more information about AUTHORITY-CHECK, see the keyword documentation of the ABAP Editor.
You can often use the fields defined by SAP in your own authorization objects. If you create a new authorization object, you do not need to define your own fields. For example, you can use the SAP field ACTVT in your own authorization objects to represent a wide variety of actions in the system.
Assigning an Authorization Object to an Object Class
Each authorization object must be assigned to an object class when it is created.
Choose Tools --> ABAP Workbench --> Development --> Other tools --> Authorization objects --> Objects.
You can also create authorization objects in the Object Navigator (SE80).
Creating / Choosing Object Classes
The system displays a list of existing object classes.
Object classes are organized according to the components of the system.
Before you can create a new object, you must define the object class for the component in which you are working. The objects are not overwritten when you install new releases.
You can also define your own object classes. If you do so, select class names that begin with Y or Z to avoid conflicts with SAP names.
Creating an Object
Enter a unique object name and the fields that belong to the object. Object names must begin with the letter Y or Z in accordance with the naming convention for customer-specific objects.
You can enter up to ten authorization fields in an object definition. You must also enter a description of the object and create documentation for it.
Ensure that the object definition matches the AUTHORITY-CHECK calls that refer to the object.
Do not change or delete authorization objects defined by SAP. This disables SAP programs that use the objects.
You can regenerate the profile SAP_ALL after creating an authorization object.
Best Regards,
Rajesh
Please reward points if found helpful.

Match Edges performance issue

The Match Edges filter only samples pixels from directly under the current layer's own boundaries for the blending calculation, yet the overall canvas size has a huge impact on the processing time. This makes the filter unusable for larger images, even if only a small layer needs to be blended.

Shooting JPEG should not be an issue when using that feature, I don't think. I have never encountered that problem. I use MTE when I am planning to stitch a panorama in Photoshop. It has always worked consistently for me. How many images are you trying to match at one time? And, are they all of a similar subject in a similar light?

How to Install Business Content Objects

Hi,
1. How to Install Business Content Objects.
2. Is there any types in Transport Request.
Thanks,
Madhu

Hi,
1. In the main menu of BI Modeling choose Data Warehousing Workbench: BI Content (Transaction RSOR). If you are already in the Data Warehousing Workbench, select the BI Content functional area by clicking on the corresponding pushbutton in the left-hand navigation window, or by choosing Goto ® Install BI Content.
You can display or hide the left navigation window of the Data Warehousing Workbench with Navigation Window On/ Off.
2. Collect the objects you want to activate and check your settings for activating BI Content with respect to Install, Match or Copy and Active Version Available.
More information: Collecting Objects
3. With Install, define how you want to install the BI Content:
Installation Type
Information
Simulate Installation
The system runs a test to see whether any errors are likely to occur during the installation. However, not all errors that may occur can be identified during simulation: Some error messages can only be generated when a real A version (not just a simulation) is available in the system. You should, therefore, only use the simulation function as a rough guide to help you identify and remove basic errors.
Install
The selected objects are installed immediately.
Install in Background
The selected objects are installed in the background.
Install and Transport
The selected objects are installed immediately and then written to a transport request.
If you have a large number of objects, SAP recommends you use the Install in Background option because installing a large number of objects can take a long time. Modifying objects that are already active can take an especially long time to complete.
Make sure that when you install objects in the background, the versions are not matched. It is always the delivery version that is installed. They are not matched
http://help.sap.com/saphelp_nw2004s/helpdata/en/80/1a66d5e07211d2acb80000e829fbfe/frameset.htm
hope it helps.
Regards
CSM Reddy

How to match sound track to movie pictures? (the sound track is shorter)

I have a sound (narrative) track of approx 1 hr which talks about the movie film. However the film I have, is a slightly different version, that is about 10 min longer then the sound track and I would like to restore the match, e.g. by something like cutting the sound track and inserting blanks, or cutting and moving the sound a couple of seconds. Note I'm totally new to Premiere V 10. I presume I would have to use start and end marks in the sound track and place the subsequent sound parts on a new sound (or narrative?) track (but it seems I will need to introduce additional silent parts, I cannot just move (drag?) the next sound track a couple of seconds to the left.
I would guess there are a couple of easy tricks to achieve my goal.
Thank you in advice.
Rob Tausk

Well well: not easy nor trivial at all, but I haven’t given up as yet! I’ll describe my workflow below.
1.       Play video fragment, and comparing film picture and sound estimate position where I need to introduce a silent period and it length.
2.       By double click play sound “comment track” on the monitor and set end stop (I would actually prefer if the sound track could be zoomed to more easily/accurately find best position)
3.       Play mute sound clip in preview and set time length with end stop and close preview
4.       Move mute clip to comment track, which has been shortened in step 2
5.       Play main sound clip in Preview and set start point
6.       Move this sound clip to comment track.
But sometime things go slightly wrong, e.g. when moving mute or sound fragment to “comment track” I find that the video track cuts (not intended)
Another difficulty I still need to master is related to the phenomena you mentioned before, related to moving sound clips, parts which were before the starting point show up (e.g. drag edges).
I hope you can roughly follow my explanatory story (I realise writing such workflow is difficult and critically depends on the same use of words concepts definitions and jargon (note my Adobe Premiere Elements is in Dutch).
I’d much appreciate your comments (maybe another software would be friendly to the inexperienced senior citizen)
Van: A.T. Romano
Verzonden: woensdag 23 juli 2014 18:37
Aan: Robert Tausk
Onderwerp: How to match sound track to movie pictures? (the sound track is shorter)
How to match sound track to movie pictures? (the sound track is shorter)
created by A.T. Romano <https://forums.adobe.com/people/A.T.+Romano> in Premiere Elements - View the full discussion <https://forums.adobe.com/message/6576612#6576612>

How to update ADF VO object to refresh the data in ADF Pivot table

I need to know how to update the View object so that the date in pivot table is refreshed/updated/filtered.
here are the steps I performed to create ADF pivot table application using VO at design time.
1) created a collection in a Data Control (ViewObject in an ApplicationModule) that provides the values I wanted to use for row and column labels as well the cell values (Used the SQL query)
2) Dragged this collection to the page in which wanted to create the pivot table
3) In the pivot table data binding editor specified the characteristics of the rows (which attribute(s) should be displayed in header), the columns (likewise) and the cells.
Now, I have a requirement to update/filter the data in pivot table on click of check box and my question is how to I update the View object so that the date in pivot table is refreshed/updated/filtered.
I have got this solution from one of the contact in which a WHERE clause on an underlying VO is updated based upon input from a Slider control. In essence, the value of the control is sent to a backing bean, and then the backing bean uses this input to call the "filterVO" method on the corresponding AppModule:
but, I'm getting "operationBinding" object as NULL in following code. Please let me know what's wrong.
here is the code
Our slider component will look like
<af:selectBooleanCheckbox label="Unit" value="#{PivotTableBean.dataValue}"
autoSubmit="true" />
The setDataValue() method in the backing bean will get a handle to AM and will execute the "filterVO" method in that, which takes the NumberRange as the input parameter.
public void setDataValue(boolean value) {
DataValue = value;
BindingContainer bindings = getBindings();
OperationBinding operationBinding = (OperationBinding)bindings.getOperationBinding("filterVO");
Object result = operationBinding.execute();
The filterVO method in the AMImpl.java will get the true or false and set the where Clause for the VO query to show values.
public void filterVO(boolean value) {
if (value != null) {
ViewObjectImpl ibVO = getVO1();
ibVO.setWhereClause("PRODUCT_TOTAL_REVENUE(+) where rownum < 10");
ibVO.executeQuery();
}

Did you define a filterVO action in your pagedef.xml file?
You might want to read on how to access service method from a JSF Web Application in the ADF Developer Guide for 10.1.3 chapter 8.5

How to get an ArrayList Object in servlet from JSP?

How to get an ArrayList Object in servlet from JSP?
hi all
please give the solution for this without using session and application...
In test1.jsp file
i am setting values for my setter methods using <jsp:usebean> <jsp:setproperty> tags as shown below.
After that i am adding the usebean object to array list, then using request.setAttribute("arraylist object")
---------Code----------
<jsp:useBean id="payment" class="com.common.PaymentHandler" scope="request" />
<jsp:setProperty name="payment" property="strCreditCardNo" param="creditCardNumber" />
<%-- <jsp:setProperty name="payment" property="iCsc" param="securityCode" /> --%>
<jsp:setProperty name="payment" property="strDate" param="expirationDate" />
<jsp:setProperty name="payment" property="strCardType" param="creditCardType" />
<%--<jsp:setProperty name="payment" property="cDeactivate" param="deactivateBox" />
<jsp:setProperty name="payment" property="fAmount" param="depositAmt" />
<jsp:setProperty name="payment" property="fAmount" param="totalAmtDue" /> --%>
<jsp:useBean id="lis" class="java.util.ArrayList" scope="request">
<%
lis.add(payment);
%>
</jsp:useBean>
<%
request.setAttribute("lis1",lis);
%>
-----------Code in JSP-----------------
In testServlet.java
i tried to get the arraylist object in servlet using request.getAttribute
But I unable to get that arrayObject in servlet.....
So if any one help me out in this, it will be very helpfull to me..
Thanks in Advance
Edward

Hi,
Im also facing the similar problen
pls anybody help..
thax in advance....
Litty

How to get the UserTransaction object in stateless session bean

Hi, I am using jboss server and jdk5 version and using EJB.
My Application flow :
JSP à Action(Struts) à Service Locator à Session bean à Entity Bean(cmp) à DB.
I tried to get the UserTransaction object in my Action. Its my code.
InitialContext ctx = new InitialContext();
UserTransaction uTrans = (UserTransaction) ctx.lookup("java:comp/UserTransaction");
After used uTrans.begin(),uTrans.commit() and uTrans. rollback () also.
Its working fine .
But, I used the the same code inside in my session bean its not working.
Stateless Session Manager Bean code :
public class SampleManagerBean implements SessionBean {
public void ejbCreate() throws CreateException { }
public void ejbRemove() { }
public void ejbActivate() {   }
public void ejbPassivate() {   }
public void setSessionContext(SessionContext sessionContext) {
this.sessionContext = sessionContext;
     public void createSample() throws EJBException
     try{
               InitialContext ctx = new InitialContext();
               UserTransaction ut = (UserTransaction) ctx.lookup("java:comp/UserTransaction");
          }catch(Exception e) {
          System.out.println( Exception === > +e)
Its throws the error ie: javax.naming.NameNotFoundException: UserTransaction not bound
How to get the UserTransaction object in my session bean. Kindly give solution the above errors.
- Thendral

first of all, you could just use sessionContext.getUserTransaction(). however, that would only work if your bean is using bean-managed transactions. the default is container-managed transaction, in which case you cannot get a UserTransaction object. if you want to manage transactions, you need to add the TransactionManagementType.BEAN annotation to your ejb.

How to match BSIM with MSEG (match FI entries to MM entries)

Hello,
I have to make a custom report calculating opening, closing stock - its value and quantities (with respect to begin and end date) however taking into consideration only certain movement types. I need to neglect those entries from BSIM which have other movement types than the ones specified as a parameter but there is no BWART field in BSIM.
How can I match FI document entries(BSIM / BSEG) to MM document entries(MSEG) ?
Thanks.

Assuming its true ( 1MM doc = 1FI doc ), the question is how to match FI document item with MM document item ?
is it a rule that entries in fi docs are in the same order as entries in mm doc?
therefore a formula (MM_entry * 2) = FI_entry would work but I'm kinda sceptical to assume that
Edited by: Bartosz Bijak on Jan 18, 2010 1:31 PM

How to Use Transient View Objects to Store Session-level Global Variables

hi
Please consider section "40.8.5 How to Use Transient View Objects to Store Session-level Global Variables"
at http://download.oracle.com/docs/cd/E14571_01/web.1111/b31974/bcstatemgmt.htm#ADFFD19610
Based on this documentation I created the example application
at http://www.consideringred.com/files/oracle/2010/ProgrammaticalViewObjectAndRollbackApp-v0.01.zip
It behaves as show in the screencast at http://screencast.com/t/qDvSQCgpvYdd
Its Application Module has a Transient View Object instance "MyEmployeesContextVOVI", as master for the child View Object instance "EmpInCtxJobVI".
On rollback the Transient View Object instance keeps its row and attribute values.
Also when passivation and activation is forced (using jbo.ampool.doampooling=false ) the Transient View Object instance seems to keep its row and attribute values.
questions:
- (q1) Why does the expression #{bindings.MyEmployeesContextVOVIIterator.dataControl.transactionDirty} evaluate as true when a Transient View Object instance attribute value is changed (as shown in screencast at http://screencast.com/t/qDvSQCgpvYdd )?
- (q2) What would be a robust approach to make a Transient View Object instance more self-contained, and manage itself to have only one single row (per instance) at all times (and as such removing the dependency on the Application Module prepareSession() as documented in "5. Create an empty row in the view object when a new user begins using the application module.")?
many thanks
Jan Vervecken

Thanks for your reply Frank.
q1) Does sample 90 help ? http://blogs.oracle.com/smuenchadf/examples/
Yes, the sample from Steve Muench does help, "90. Avoiding Dirtying the ADF Model Transaction When Transient Attributes are Set [10.1.3] "
at http://blogs.oracle.com/smuenchadf/examples/#90
It does point out a difference in marking transactions dirty by different layers of the framework, "... When any attribute's value is changed through an ADFM binding, the ADFM-layer transaction is marked as dirty. ...".
This can be illustrate with a small change in the example application
at http://www.consideringred.com/files/oracle/2010/ProgrammaticalViewObjectAndRollbackApp-v0.02.zip
It now shows the result of both these expressions on the page ...
#{bindings.MyEmployeesContextVOVIIterator.dataControl.transactionDirty}
#{bindings.MyEmployeesContextVOVIIterator.dataControl.dataProvider.transaction.dirty}... where one can be true and the other false respectively.
See also the screencast at http://screencast.com/t/k8vgNqdKgD
Similar to the sample from Steve Muench, another modification to the example application introduces MyCustomADFBCDataControl
at http://www.consideringred.com/files/oracle/2010/ProgrammaticalViewObjectAndRollbackApp-v0.03.zip
public class MyCustomADFBCDataControl
extends JUApplication
@Override
public void setTransactionModified()
    ApplicationModule vApplicationModule = (ApplicationModule)getDataProvider();
    Transaction vTransaction = vApplicationModule.getTransaction();
    if (vTransaction.isDirty())
      super.setTransactionModified();
}Resulting in what seems to be more consistent/expected transaction (dirty) information,
see also the screencast at http://screencast.com/t/756yCs1L1
Any feedback on why the ADF Model layer is so eager to mark a transaction dirty is always welcome.
Currently, question (q2) remains.
regards
Jan

How to activate all inactive objects for current user

Hi
How to activate all inactive objects for current user ...
... I have found a (long winded) way to do this:
- Environment / Inactive Objects
- Add to Worklist
- Display Worklist
- Select All
- Activate
this will open a dialog titled "Inactive Objects for <username>"
which has the exact functionality I need ... but I can't figure out how to get to this dialog directly - without so many intermediate steps
the SAP docs repeatedly mention the ability to activate the inactive worklist - but do not mention how
does anybody know the TCode for this dialog?
thanks
ps does the term "mass activation" apply to importing change requests rather than development activation?
Edited by: FireBean500 on Jun 4, 2010 11:07 PM

No other way. But usually it's far more simple as all objects are already in our own worklist.
I wonder why your objects are not already in your worklist, as everytime you create or maintain an object, it is added to your worklist.

How can you move the objects from one server to another?

how can you move the objects from one server to another?

Hi,
Collecting objects for Transporting
1. rsa1->transport connection
2. left panel choose 'object type', middle panel choose 'infocube' and 'select objects'
3. then choose your infocube and 'transfer'
4. will go to right panel, choose collection mode 'manual' and grouping only 'necessary objects'
5. after objects collection finished, create request
6. If they are $TMP, then change the package.
7. When you click the Save on the change package, it will prompt for transport. Here you can provide an existing open transport request number, or if you like here itself you can create a new one.
8. You can check the request in SE09 to confirm.
Releasing Transport Request
Lets say you are transporting from BWD to BWQ
Step 1: In BWD go to TCode SE10
Step 2: Find the request and release it (Truck Icon or option can be found by right click on request #)
Note: First release the child request and then the parent request
Steps below are to import transport (generally done by basis )
Step 1: In BWQ go to Tcode STMS
Step 2: Click on Import queue button
Step 3: Double Click on the line which says BWQ (or the system into which transport has to be imported)
Step 4: Click on refresh button
Step 5: High light the trasnport request and import it (using the truck icon)
Transport
http://help.sap.com/saphelp_nw2004s/helpdata/en/b5/1d733b73a8f706e10000000a11402f/frameset.htm
http://help.sap.com/saphelp_nw70/helpdata/en/0b/5ee7377a98c17fe10000009b38f842/frameset.htm
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/media/uuid/224381ad-0701-0010-dcb5-d74236082bff
Hope this helps.
thanks,
JituK

How do I move an object from one photo to another and then change the scene, i.e. winter to sum?

How do I move an object from one photo to another and then change the scene, i.e. winter to summer?

OK.
Open the picture with the new scene. This will be your canvas.
Open the picture with object A, select it with one of the selection tools, go to Edit>copy
Go back to the new scene/canvas, Go to Edit>paste
Repeat for object B
Use the move tool to position A & B, each on its own layer. Use the corner handles of the bounding box to resize, if necessary
You should have 3 layers: Background layer, and the 2 layers with A & B
Note: It's best if the resolution of the 3 picture files is the same value.

How to match edges of objects precisely?

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