# michael scheinfeild

computer vision in IOS , opencv , and for androind

image processing

machine learning

signal procesiing

c++,c#,matlab,c

Professional Interests: image processing

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**Content Feed**

Error: Undefined function 'preprocessData' for input arguments of type 'cell'.

some fix needed in preprocessing , first round and be sure it is positive top left , i think maybe check box outside image will ...

1 year ago | 10

Neural network - target dataset

i suppose first you can normilize the train set and use it to normalize test set meant=mean(train) mint=min(train) maxt=max...

1 year ago | 0

| accepted

Question

training deep network accuary goes to 0 ?

hi i train lstm network and receive bad accuracy during the train what parameters i can change, layers to add <</matlabcent...

3 years ago | 0 answers | 0

### 0

answersError in using trainNetwork with training data and labels

hi i have similar issue and cant solve it i also look at the example <https://www.mathworks.com/help/nnet/examples/classify-se...

3 years ago | 0

how to find large curvature location

the file is there https://www.mathworks.com/matlabcentral/fileexchange/37388-fast-2d-peak-finder

3 years ago | 0

Question

how to find large curvature location

i want to detect the curve point in the lines the lines themselves not straight <</matlabcentral/answers/uploaded_files/10...

3 years ago | 2 answers | 0

### 2

answersWhich classifier SVM or Neural Network is better for accurate results?

it dependes on your data type and amount of data, deep learning is for large amount of data. svm is easiar to start and check

5 years ago | 1

neural network to detect points in signal

<</matlabcentral/answers/uploaded_files/48690/net.png>> more complex example . the marked lines are outputs as one. they repr...

5 years ago | 0

Question

neural network to detect points in signal

i have two signals they look like sine wave but with some noise . in this signals of length 100 each i have 1-5 points each time...

5 years ago | 2 answers | 0

### 2

answersQuestion

folder name starts with +toolboxA what it means

hello i download some package and now inside there are folders and subfolder all starts with + so i cant add all the paths and a...

5 years ago | 1 answer | 0

### 1

answerdownload images from web api google

thank you but how to downloaded the images or read them ? i receive now : *x=urelread(url)* = !doctype html><html dir="rtl...

6 years ago | 0

Statistics: column scatter plot / 2D-dot plot + mean + std dev

gscatter(x,y,group) this will plot each group in different color

6 years ago | 0

Question

download images from web api google

hi i want to search images of trees and download them as jpg i know there is google api how yo use it for images download

6 years ago | 2 answers | 0

### 2

answershow to create string includes '

but the length is ok so it may be helpful to me

6 years ago | 0

Question

how to create string includes '

i have string ['_ ,,,77 - -'''''"''"i''-_G8" '] but it is illegal how to create it

6 years ago | 3 answers | 0

### 3

answershow can I sum 2 or more sine waves into one sine wave?

just z=x+y if x and y different lengths you can interpolate it to correct length

6 years ago | 0

| accepted

Support vector Training, SVM Train

if you have 1 feuters just use histogram and fit to some Gaussian model determine the threshold it seems what you did is corre...

6 years ago | 0

Question

how locate words in ocr of image

hi i have result of ocr which is text and words and bounding boxes. then in all text i want to find for example date so i use r...

6 years ago | 0 answers | 0

### 0

answershow can i plot data of different types using matlab plot(x,y) ?

you can try to conver each of cell array by split 23/05/15 to 3 parts by search "/" the you can code it to index = year*10+mon...

6 years ago | 0

Subtraction between the rows of matrix

just prepare the row index before as example : a=[ 1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16] a = 1 2 3...

6 years ago | 0

How do I calculate the impulse response?

f=100;% frequanecy fs=1000; n=[1:1000]*f/fs; u=ones(n,1) x(n)=2*cos(0.5*pi*n).u(n); % ~ (check indexes im not...

6 years ago | 0

| accepted

How can i modelling Radar scaning area?

http://www.labbookpages.co.uk/audio/beamforming/delaySum.html

6 years ago | 0

| accepted

How can i modelling Radar scaning area?

hi start with beamforming create target at some range and angle determine your beamformer parameters : number staves, distance...

6 years ago | 0

Question

how to fit gaussian model and plot it

hi i have vector of 1000 numbers i want to fit Gaussian model i use [n,cent]=hist(x,50) then bs = glmfit(cent,n,'no...

6 years ago | 1 answer | 0

### 1

answerproblem with dir function in R2014A

so there is no quick solution , what i did is rename all files to a(1).jpg , a(2).jpg ant then run in loop where name is n...

6 years ago | 0

How to rotate a line about center point??

use imrotate or calculate the affine transform

7 years ago | 0

How to save matrixes to files with similar names in loop?

files=dir(fullfile("data","*.dat"); for(n=1:length(files)) d=files(n).name; somename=strcat('a','bla',num2str(n));......

7 years ago | 0

Question

xcorr 2 max indexes

hi i want to find the max index of corner i do 2 times xcorr 2 in the left i have good index while in the right not <</matla...

7 years ago | 0 answers | 0

### 0

answersQuestion

rotation matrix and regionprops

hello i have some binary image i found the orientation and rotated the image stats1 = regionprops(bw,'Orientation','Area'...

7 years ago | 1 answer | 0