Rotate Image Algorithm matlab implementation

function [R] = RotateIm(A,angle)
A=padarray(A,[50,50]);
angle=-angle*pi/180; %to make the positive rotate clock wise like required
Tinv=[cos(angle) sin(angle);-sin(angle) cos(angle)];
R=zeros(size(A,1),size(A,2));
px=(size(A,1))/2;
py=(size(A,2))/2;
for m = 1:size(A,1)-1
    for n = 1:size(A,2)-1
        x=Tinv*[m-px;n-py]+[px;py];
        I=floor((x(1,1)));
        K=floor((x(2,1)));
        a=x(1,1)-I;
        b=x(2,1)-K;
       
       
       %  R(m,n)=R(m,n)+(1-a)*(1-b)*A(I,K)+a*(1-b)*A(I+1,K)+(1-a)*b*A(I,K+1)+a*b*A(I+1,K+1);
         if(I>=1&&I<=size(A,1)&&K<=size(A,2) && K >=1 )
             R(m,n)=R(m,n)+(1-a)*(1-b)*A(I,K);
         end
        if(I<size(A,1)&&I>=1 && K >=1 && K <= size(A,2))
          R(m,n)=R(m,n)+  a*(1-b)*A(I+1,K);
        end
       
        if(I>=1 && I<=size(A,1) && K >=1&& K < size(A,2) )
          R(m,n)=R(m,n)+   (1-a)*b*A(I,K+1);
        end
        if(I<size(A,1) &&I>=1&&K>1&& K < size(A,2) )
              R(m,n)=R(m,n)+   a*b*A(I+1,K+1);
        end
    end
end
[MaxRow,MaxCol] = find(R,1,'last');

[MinRow,MinCol] = find(R,1,'first');

R=R(min(MinRow,MinCol):max(MaxRow,MaxCol),min(MinRow,MinCol):max(MaxRow,MaxCol));

R=uint8(R);

end

Integral Image Algorithm

function [II] = IntegIm(A)
A=double(A);
s=double(zeros(size(A,1)+1,size(A,2)+1));
II=double(zeros(size(A,1)+1,size(A,2)+1));
for  m = 2:size(A,1)+1
    for n = 2:size(A,2)+1
   
          s(m,n)=double(s(m,n-1) + A(m-1,n-1));
   
    end
   
end
for m = 2:size(s,1)
    for n = 2:size(s,2)
     II(m,n)=double(II(m-1,n)+s(m,n));
    end
end


end

IBM BPM Coach Validation Example

1-Create Human Service with name "testValidate"

 2-Create Private Variable "text"

3-add coach to the human service name it "testvalidation"

4-add text coach and bind it to the text variable

5-select the path from the TestValidation coach to the end event and then change fire validation setting to before then add a server script named "ValidationScript" and connect it like the screen shot

6-add server script and put the following code in it

if(tw.local.text=="bpm")
{
tw.system.addCoachValidationError(tw.system.coachValidation, "tw.local.text", "error in validation")
}

7- run the human service and write bpm at the screen shot then click ok you will see that the validation is fired

Matlab Implementation for SIFT "Scale-invariant feature transform "

Scale-invariant feature transform (or SIFT) is an algorithm in computer vision to detect and describe local features in images.

function [outImage,keypoints] = my_sift(A,maxS,t)
if (~exist('t', 'var'))
        t=0;
end
 if(size(A, 3)>1)
A=rgb2gray(A);
end
m=1;
sigmas=(1:1:maxS);
%A=padarray(A,[1,1]);
A=double(A);
keypoints=zeros(size(A,1)*size(A,2),4);
logImages=zeros(size(A,1),size(A,2),size(sigmas,2));
t=t*max(max(A));
for k=1 :size(sigmas,2)
    h=sigmas(1,k)*sigmas(1,k)* fspecial('log', 2*ceil(3*sigmas(1,k))+1,sigmas(1,k));
     logImages(:,:,k)= imfilter(A,h);
end

for i=2 :size(A,1)-1,
    for j=2:size(A,2)-1,
       isKeypoint=1;
        [maxVal,maxInd]=max(abs(logImages(i,j,:)));
        if(maxInd~=1 && maxInd~=maxS)
         
           for q=(i-1):i+1
               for w=(j-1):j+1
                 
                 if(abs(logImages(i,j,maxInd))<(t*maxInd*maxInd)|| abs(logImages(i,j,maxInd))< abs(logImages(q,w,maxInd-1))||abs(logImages(i,j,maxInd))< abs(logImages(q,w,maxInd))||abs(logImages(i,j,maxInd))< abs(logImages(q,w,maxInd+1)))
                     isKeypoint=0;
                     break;
                 end
               end
                if(isKeypoint==0)
                    break;
                end
           end
        else
            isKeypoint=0;
        end
   
        if(isKeypoint==1)
            keypoints(m,1)=j;
             keypoints(m,2)=i;
              keypoints(m,3)=sqrt(2)*sigmas(1,maxInd);
              keypoints(m,4)=sigmas(1,maxInd);
             m=m+1;
                 
           
        end
   end
     
   
end
%yellow = uint8([255 255 0]);
%shapeInserter = vision.ShapeInserter('Shape','Circles','BorderColor','Custom','CustomBorderColor',yellow,'LineWidth',0.1);
A=uint8(A);
outImage=A;
keypoints= keypoints(1:min(find(keypoints==0))-1,1:4);
%RGB = repmat(A(2:size(A,1)-1,2:size(A,1)-1),[1,1,3]); % convert I to an RGB image
for b=1:size(keypoints,1)  %min(find(keypoints==min(keypoints,1)))
outImage = insertShape(outImage, 'circle',keypoints(b,1:3) );


end
%yellow = uint8([255 255 0]);
%shapeInserter = vision.ShapeInserter('Shape','Circles','BorderColor','white');
%RGB = repmat(A,[1,1,3]);
%outImage = step(shapeInserter, A(2:size(A,1)-1,2:size(A,1)-1), keypoints);

end

Custom Exception Message Using Out of the box Exception in IBM BPM

to  catch exception using out of the box intermediate event  get the message from tw.system.error using the following Xpath expression

tw.local.error=tw.system.error.xpath("/error/localizedMessage").item(0).getText();

and here is the output

and here is the used human service to demonstrate this in the sql service i tried to access www table which is not in the Database

Matlab Implementation For Average Filter Using Integral Image

function [Filtered_image] = AverageFilter(A,s)
%S should be odd if s is even will increment by 1
%size of the filter is sxs

if(rem(s,2)==0 && s>1)
   s=s+1;
end  
       

II=integralImage(A);

x=zeros(size(II,1),size(II,2));
for m = 2:size(A,1)
    for n = 2:size(A,2)
       
        if((m+floor(s/2))<=size(II,1)&&(n+floor(s/2))<=size(II,2))
          x(m,n)=x(m,n)+II(m+floor(s/2),n+floor(s/2));
        end
        if((n-floor(s/2)-1)>=1&&(m-floor(s/2)-1)>=1)
         x(m,n)=x(m,n)+II(m-floor(s/2)-1,n-floor(s/2)-1);
        end  
        if((m-floor(s/2)-1)>=1&&(n+floor(s/2))<=size(II,2))
             x(m,n)=x(m,n)-II(m-floor(s/2)-1,n+floor(s/2));  
        end
        if((m+floor(s/2))<=size(II,1)&&(n-floor(s/2)-1)>=1)
             x(m,n)=x(m,n)-II(m+floor(s/2),n-floor(s/2)-1);
        end
       
       x(m,n)=round((x(m,n)/(s*s)));
       
       
    end
end

 Filtered_image= uint8(x(2:size(x,1),2:size(x,2)));
end

Using Dojo Chart Toolkit For Custom Reports in IBM BPM

The following to steps show how to use the Dojo Charts Toolkit to make custom reports

This example is implemented on  the Hiring Request Process

Step1: download and import the dojo toolkit from this link

http://wiki.bpmwiki.com/display/samples/BPM8+Dojo+Chart+Toolkit#BPM8DojoChartToolkit-DownloadPackage

 Step2:open the dojo chart process app in the process designer this is a process application that has some examples on how to use the charts

Step3:copy the following items to the process application in which you want to use the chart and develop the reports

Step4:open the Sample human Service in the configure chart script put the labels that will appear on axis of the chart. The other axis will be filled by data entries for series as will be shown in step 9

for example this report for number of employees at each region   per department so each region is considered as a label “west,east,north,south”

Step5: In the coach put a bar chart control or a pie chart whatever you want to try

 Step6:in the view make sure that you choose the basic bar control you copied from the Dojo Chart process application

Step7: open the basic chart default AS

Step8: in the Initialize Linear step put the departments you want to report

 Step9: In the set linear data script put the number of employees for each department at each region

Step10:Run the sample human service this should be the final output

More Than One Aggregation criteria in same SQL Query

Microsoft SQL Server has a very nice feature  that you can write conditions inside the aggregation functions for example count( CASE WHEN Status=1 THEN 1 ELSE null END   ) 

with this feature we can do more that one feature in the same query

for example:
if we have table Person that has the following columns
Fname
Lname
Active

we can make the following Query to get number of active and number of inactive employees

select count( CASE WHEN Active=1 THEN 1 ELSE null END   )  as NUM_ACTIVE , count( CASE WHEN Active=0 THEN 1 ELSE null END   )  as NUM_INACTIVE from Person