# 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**

How to draw normal line at given points ?

https://michaelsheinfeild.medium.com/unit-normal-vector-to-curve-d63ef0124acd

1 year ago | 0

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 ...

2 years ago | 14

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...

2 years 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...

4 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...

4 years ago | 0

how to find large curvature location

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

4 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...

4 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

6 years ago | 1

Solved

Make a checkerboard matrix

Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

6 years ago

Solved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

6 years ago

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...

6 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...

6 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...

6 years ago | 1 answer | 0

### 1

answerSolved

Uniform binary crossover

Given two binary vectors, return the two children by combining the genes of them using a binary crossover mask. More informat...

6 years ago

Submitted

Deep Learning Lecture Regularization

deep learning introduction , fitting use kernel

7 years ago | 1 download |

download 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...

7 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

7 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

7 years ago | 2 answers | 0

### 2

answershow to create string includes '

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

7 years ago | 0

Question

how to create string includes '

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

7 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

7 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...

7 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...

7 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...

7 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...

7 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...

7 years ago | 0

| accepted

How can i modelling Radar scaning area?

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

7 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...

7 years ago | 0