# Chandra Kurniawan

### National Institute of Technology Indonesia

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Learn digital image processing with Matlab.

I regularly delete my unaccepted answers.

Professional Interests: Image processing

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**Feeds**

How do I combine multiple plots in one graph?

To combine multiple plots in one graph, use the “hold on” command, such as: plot(1:10) hold on plot(11:20) hold off ...

5 years ago | 11

| accepted

Convert AVI file to series of images

Hi, This is the simpler version : obj = mmreader('rhinos.avi'); vid = read(obj); frames = obj.NumberOfFrames; f...

12 years ago | 4

| accepted

Image to binary conversion

for i = 1 : a for j = 1 : b k{i,j} = dec2bin(image(i,j)); end end please use cell-array to s...

12 years ago | 0

| accepted

matlab code

The error message sounds you accessed X(213,1) while the size of X is 212x320 X is a gray image generated from command : X = ...

12 years ago | 0

| accepted

resize subplot

Hi, Pan You can use 4 axes and replace command subplot with imagesc(vid2(:,:,:,frame3),'parent',axeshandle); This is...

12 years ago | 0

| accepted

make history

Hi, Rahma I have seen your picture. I think I cannot do it with your way. Imagine if we have A-m-5 in 1st component an...

12 years ago | 1

| accepted

combine binary image

Hi, I think, first you should check whether the data is empty or not using for-loop. hnd = {handles.cJalan,handles.cSung...

12 years ago | 1

| accepted

how to use fopen in this situation?

Hi, ts is cell array. please try ts = cell2mat(ts); after line ts = inputdlg(prompt,dlg_title,num_lines,def...

12 years ago | 1

| accepted

how to saving image of quadtree from axes

Hi, Elsya please try to add this line ImQuadtree = 255*ImQuadtree; after line : ImQuadtree = getimage(handles.qu...

12 years ago | 0

| accepted

how to use button that controls video?

function vidplayer() obj = mmreader('rhinos.avi'); v = read(obj); hstat = uicontrol('unit','pixel','style','checkbox'...

12 years ago | 0

| accepted

linking GUIs in MATLAB

Hi, Let say I have 2 GUIs. untitled1 untitled2 In first GUI I have pushbutton to call the second GUI. Just...

12 years ago | 1

| accepted

External functions (with a GUI)

Hi, Maybe this will helps. I have GUI as shown in picture below : <<http://i1196.photobucket.com/albums/aa410/nasa078/M...

12 years ago | 1

| accepted

use subplot play video

Hi, maybe obj = mmreader('xylophone.mpg'); vid = read(obj); for frame = 1 : size(vid,4) bw = im2bw(vid(:,:,:,f...

12 years ago | 0

| accepted

centroid of an image

Hi, did you mean 'find centroid of objects in an image'?? use *regionprops* with property : centroid Eg : stat = regio...

12 years ago | 6

| accepted

create target for neural network

Hi, Remo Feature vector that extracted from an image ideally m x 1 matrix. You said that it's 42 x 42. Is it means 42 feat...

12 years ago | 1

| accepted

How to Capture objects in big image and divided them to small images?

This code works just for this image only Irgb = imread('b653er.jpg'); Igray = rgb2gray(Irgb); Ibw = im2bw(Igray,grayt...

12 years ago | 0

| accepted

How to crop out the barcode??

D = C > 20; Ilabel = bwlabel(D); stat = regionprops(Ilabel,'boundingbox'); for x = 1 : length(stat) Icrop{x} =...

12 years ago | 0

| accepted

need help on a simple question.

Hi, please replace * fprintf ('The char is %4s\n','s',char)* with * fprintf ('The char is %s\n',char);*

12 years ago | 0

| accepted

Solved

Increment a number, given its digits

Take as input an array of digits (e.g. x = [1 2 3]) and output an array of digits that is that number "incremented" properly, (i...

12 years ago

Solved

Too mean-spirited

Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

12 years ago

Solved

Which values occur exactly three times?

Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

12 years ago

Solved

Most nonzero elements in row

Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

12 years ago

Solved

Summing digits

Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

12 years ago

Solved

Find common elements in matrix rows

Given a matrix, find all elements that exist in every row. For example, given A = 1 2 3 5 9 2 5 9 3 2 5 9 ...

12 years ago

Solved

Reverse Run-Length Encoder

Given a "counting sequence" vector x, construct the original sequence y. A counting sequence is formed by "counting" the entrie...

12 years ago

Solved

Counting Sequence

Given a vector x, find the "counting sequence" y. A counting sequence is formed by "counting" the entries in a given sequence...

12 years ago

Solved

De-dupe

Remove all the redundant elements in a vector, but keep the first occurrence of each value in its original location. So if a =...

12 years ago

Solved

Duplicates

Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

12 years ago

Solved

Remove any row in which a NaN appears

Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

12 years ago