I need to save a set of pre-processing images in matlab, resulting in grayscale images. The problem is the fact that these pre-processed images have pixel values higher than 255. If I save them with imwrite() as, for instance, .PNG files, does matlab normalize the values to be in [0,255] or no? should I have to save my images in another format to keep their original values?

Answer:

You can use the `bitdepth`

parameter to set that.

```
imwrite(img,'myimg.png','bitdepth',16)
```

Of course, not all image formats support all bitdepths, so make sure you are choosing the the right format for your data.

matlab,simulink

I am working on a simple System Object in Matlab/Simulink. It looks like this : classdef realtime_header_detectorSO < matlab.System & matlab.system.mixin.Propagates % correlateHeader % % This template includes the minimum set of functions required % to define a System object with discrete state. properties Header %nrOfBitsInPreviousStep=0; s=100; d=zeros(1,s); end properties...

matlab

What is the ellipsis for in this Matlab statement? frame = insertObjectAnnotation(frame, 'rectangle', ... bboxes, labels); ...I could not find in their online doc....

matlab,svm,auc

I'm having a weird problem in training an SVM with an RBF kernel in Matlab. The issue is that, when doing a grid search, using 10-fold cross-validation, for the C and Sigma values I always get AUC values equal to approximately .50 (varying between .48 and .54 depending) -- I...

c++,matlab

Is there an alternative way to call a C++ class using MATLAB, and operate its methods on MATLAB variables?

matlab,plot,legend,movie

i have a question regarding legend for movies. This is my code: fig = figure(); for i = 1: 70000 plot(signal1) hold on; plot([i,i],[-5,5]) plot(signal2,'r') hold off; title('\fontsize{14} my data'); legend('signal1','signal2'); axis tight; f(i) = getframe(fig); end The legend shows the same colors for the first two things I plot....

matlab

So, I want to be able to look at (read: copy) MATLAB's NonLinearModel method of printing the regression results to the screen such as this. Nonlinear regression model: y ~ (alpha1 - alpha2*t^0.5) Estimated Coefficients: Estimate SE tStat pValue alpha1 1.0253 0.0082253 124.66 4.8823e-24 alpha2 0.0061783 0.00073277 8.4314 4.4834e-07 Number...

c#,wpf,image,background,resources

This question already has an answer here: Change WPF window background image in C# code 3 answers I'd like to change the background image of my WPF application by a button. I know how to do it using WindowsForms, but in WPF I failed. I found a solution already,...

matlab,image-processing

I have a labeled matrix containing two objects. How can I thicken an object to a curve? Actually I have the following image: and I want this: Each pixel of the resulting curve is the median of each column. But if you have another idea, it is acceptable, because I...

matlab,image-processing

I am trying to read all the images in the folder in MATLAB using this code flst=dir(str_Expfold); But it shows me output like this. which is not the sequence as i want. Can anyone please tell me how can i read all of them in sequence? for giving downmark, please...

image,matlab,image-processing,mask,boundary

I'm trying to create a mask (or similar result) in order to erase pieces of a binary image that are not attached to the object surrounded by the boundary. I saw this thread (http://www.mathworks.com/matlabcentral/answers/120579-converting-boundary-to-mask) to do this from bwboundaries, but I'm having trouble making suitable changes to it. My goal...

matlab,matrix,least-squares

How can I solve , where and and in the least squares sense in matlab? So I'd like to have the minimizing as output....

matlab,system,equation

sorry if it already has a answer..i tried other links but it didn't understand i have 2 1*63 array .landa and v. each of their members are syms. and each v member is a function of all landa members.i have already calculated v members and they are all symbolic equations...

python,xml,image,resize

I'm trying to make a script that resize multiple or a single image based on a data pulled from XML. My question is if i have multiple images how can I print out a qusetion like "There are more than 1 image do you wish to resize image 2 also?......

matlab,matrix,multidimensional-array,scalar

I'm having problems multiplying specific values within my multidimensional matrix by a scalar. My matrix has the following dimension: size(comDatabe) = 5 10 3 397 10 The third dimension is an x-y-z coordinate frame. Something went wrong and now my y-axis is defined upside down for one subject (#8 out...

php,mysql,image

I have a MySQL table with a column "rounds" and each "rounds" has his own photos. Exemple round1 has photos from start=380 end=385. This means it has 6 photos and the name of the photos contains 380,381,382,383,384 or 385 inside. I use this PHP code to display the photos from...

matlab,filtering,convolution

I'm trying to design a Wiener filter in Matlab for a deconvolution problem but I'm having a lot of problems. I have a gaussian white noise process with a variance of 1.2 and a impulse response which has length two. Its values are g(0) = 5 and g(1) = 4....

matlab,matrix

I have a matrix looks like: 0 0 0 0 0 1 0 0 0 0 0 2 0 0 0 0 0 2 0 0 0 0 0 1 0 1 0 0 0 1 0 4 0 0 0 0 0 3 0 0 6 0 0 4...

arrays,matlab

I have two vectors, one of them stores the width dimension of a set of images and another one the height of these set of images. I want to use these values as two dimensional vectors [width height] and store them in a matrix. The first line, for instance, keeps...

matlab,typeconverter

I'm currently using a MATLAB to work and I need some help: I need to convert my output data (variable: units) be a double instead of a cell because I must perform a sum: units = inputdlg(question,title); sum = units + i; I've tried this code also but didn't solve...

android,image,crop

I am using the following code to crop images from camera and gallery : private void doCrop() { final ArrayList<CropOption> cropOptions = new ArrayList<CropOption>(); Intent intent = new Intent("com.android.camera.action.CROP"); intent.setType("image/*"); List<ResolveInfo> list = getPackageManager().queryIntentActivities(intent, 0); int size = list.size(); if (size == 0) { Toast.makeText(this, getApplicationContext().getString(R.string.crop_unavailable), Toast.LENGTH_SHORT).show(); // return }...

matlab,machine-learning

This is my implementation of CostFunctionJ: function J = CostFunctionJ(X,y,theta) m = size(X,1); predictions = X*theta; sqrErrors =(predictions - y).^2; J = 1/(2*m)* sum(sqrErrors); But when I try to enter the command in MATLAB as: >> X = [1 1; 1 2; 1 3]; >> y = [1; 2; 3];...

matlab,events,delay

In Matlab functions can be started at events,but occasionally, like with the resize function, the events are called in rapid order and the function is called many times in succession, which can cause weird behavior and lag. Is there a way to have it listen for the event but only...

asp.net,image

I will make a website whit ASP.NET using C# on the background. I have make my master page with the following image: <img src="afbeeldingen/berichten.png" alt="new messages" /> Because I have a lot of pages in my site, I have make directories in my solution. My problem is now when I...

java,image,canvas,graphics,javafx

I am building an application for my colleagues to crop image. I use FXML with Scene Builder to build the GUI. The user click a button to choose a image from his computer. Then, the image is shown in the GUI. User can zoom and move in the pane. At...

ios,image,path

I am developing an App in which I have stored images through imagePicker. now i want to display same images in my collectionView. I got response as a path path=assets/image/155/155_557b1259b8a51.jpg when i add http://xyz.com.assets/image/155/155_557b1259b8a51.jpg then it shows error. How can i get the images through this path.Please Help me out....

matlab,matlab-figure

I'm struggling to plot multiple functions on one figure. Here is the code that I have: syms t a; a=0.9514; F1=0.5*sqrt(3*t^2); F2=-0.28375*t^2+1.155*a*(t-a)+1; F3=1; E1=diff(F1,t); E2=diff(F2,t); E3=diff(F3,t); I want to plot E1, E2 and E3, each only within a certain range, to make a "composite" line. I've tried plotting with ezplot...

matlab,plot,signals,circle

I have some random signal (for example sin signal) with the time scale. t=0:0.1:2*pi y=sin(t) plot(t,y) Now I want to draw this signal on this circle. So the time vector actually becomes an envelope of the circle. Envelope of the circle represents "y = 0" in cartesian coordinate system. Here...

matlab,distribution,sampling,random-sample

How can I create a vector x in Matlab that has values between 0.8 and 1.2, randomly sampled from a: 1. Uniform 2. Normal distribution? There are a lot of functions dealing with distributions, but I'm having trouble using them properly....

matlab,image-processing

I have a binary matrix containing several binary objects and I want to bridge between them. Actually I have the following picture: And the result has to be like this: Is there any function or a shortcut way, other than loops, for this problem?...

string,matlab

I have a string "FDFACCFFFBDCGGHBBCFGE" . Could anyone help me to generate a new string with the same order but no element inside repeated twice. Thanks ! The expected output should be like this : "FDACBGHE"...

string,matlab,filenames

I am using the below mentioned code to get the file names of images according to their id's from images_1 text file as strings and use them to read the images from their directory image_count=1; for image_count=1:6 file=fopen('D:\Academics\New folder\CUB_200_2011\images_1.txt','r'); C = textscan(file, '%s'); original_image=imread('D:\Academics\New folder\CUB_200_2011\images\%s','C{1}{2*(image_count)}'); imshow(original_image) end I am able...

matlab,plot

I want to display three figures in a figure window. Assuming that I divide 2x2 regions. subplot(2,2,1) ---------+----------- | R1 | R2 | ---------+----------- | R3 | R4 | ---------+----------- I want to show a figure merging R1 and R3 ant other two in R2 and R4 I can display...

html,ruby-on-rails,image,ruby-on-rails-4,svg

I am trying to replace the tag with link_to in my rails application view. for replacing I have svg icon, text and link all in one tag. Here is below <a class="navbar-brand" href="index.html"><%= image_tag 'logo.svg', "data-svg-fallback" => image_path('logo.svg'), :align=> "left" ,:style => "padding-right: 5px;" %> My Project </a> but I...

wordpress,image,wordpress-plugin,resize-crop,wp-image-editor

I am working on WordPress plugin. In plugin the user upload images from meta field and in back end i use wp_image_editor for cropping and re sizing the images. The images re sized very well but on cropping the images not cropped very well. I give x-dimension 100 and y-dimension...

javascript,image,preload

I have a Python websocket application which sends an image path to a JavaScript HTML file. When the image path is received, I change the background image of the webpage to the supplied image. The issue I'm having at the moment, is when the background changes from the old image...

matlab,time-frequency

Code tfr = abs ( tfr ); [row_size, column_size] = size(tfr); tfr = tfr(1:round(row_size/2), 1:row_size); surf(tfr); view(2); I get in R2014b of OSX 10.10.3 Yosemite but rotating around shows that the cells should not be black Why is the output black? I wonder if this is a hardware problem or...

javascript,node.js,image,html5-canvas,sails.js

I am using nodejs sails for my app. The app is going to use 50-100 images at some points. I was wondering if someone can point pro and cons of using /assests/images/ folder vs outside repository i.e. AWS S3 for image storing and pulling to draw on the canvas.

image,matlab,image-processing,computer-vision

I need to save a set of pre-processing images in matlab, resulting in grayscale images. The problem is the fact that these pre-processed images have pixel values higher than 255. If I save them with imwrite() as, for instance, .PNG files, does matlab normalize the values to be in [0,255]...

javascript,html,css,image

I have two images side-by-side within a block-level container with arbitrarily different dimensions (as in, they could be any two images) that I want to dynamically adjust the width of so that the overall height of the two images is the same. I don't think this can be done in...

matlab

I have 20 column vectors in the workspace and I'd like them all to be contained within a cell array. They're all labelled data1, data2, data3,...data20. Is there a faster way to do this than: cell = {data1, data2, data3, data4, data5, data6, ...} all the way up to data20?...

matlab

my matlab version is 2012a. when I use fitcknn,has this error: Undefined function 'fitcknn' for input arguments of type 'cell'. how to calculate probability for each class for predicate with knn without fitcknn? after use this code, I want to calculate prob_estimates for each neighbors: knn = ClassificationKNN.fit(trainsample, trainlabel,'NumNeighbors',7); y...

matlab,plot

I have a semilogarithmic plot which works so far with semilogx. Now I would like to change the tick labels. Now it says 10^8 10^9 ... 10^13, but I would like to see 1e8, 1e9, ... 1e13 on the x-axis. How can I change that? Cheers Manuel...

matlab,plot

I have multiple 2D line plots in Matlab (they represent some wave moving through space). Each plot represents the wave at some time t. I want to animate through these plots (i.e. show the first plot for a fraction of a second, then show the next one, and the next,...

matlab,polynomial-math

I have the following code: syms z Gc=1.582*(1-0.3679*z^-1)/(1+.418*z^-1); Ghp=.3679*(z^-1)*(1+.718*z^-1)/((1-z^-1)*(1-.3679*z^-1)); T=(Gc*Ghp)/(1+Gc*Ghp); clipboard('copy', latex(simplifyFraction(T))); Which results in following for T: How can I normalise coefficients? I.e. I want the z2 in denominator and z in numerator to have the coefficient of 1. Is there any function in Matlab to do so?...

matlab

Is it possible to add statements in between the codes. For example: If I have a code like this, r(:,1) = a(:,1) - a(:,2); Then can I write it as, r(:,1) = a(:,1)("this is a constant") - a(:,2)("this is a variable"); ...

image,excel-vba,printing

I would like to print an image that shows in a frame on a userform. frame1.Picture = LoadPicture(spath & xPicture & ".jpg") spath is the full path to where the picture is stored. This shows the picture just fine. Now I would like to be able to print it. Is...

php,mysql,image,png

I have seen loads of other topics and I've tried them all. Can someone please help with why this script won't upload PNG files? Blank PNG image being displayed. $image = $_FILES['file']['tmp_name']; $image_name = $_FILES['file']['name']; $ext = pathinfo($image_name, PATHINFO_EXTENSION); $location = "Profiles/{$user}/Picture/{$image_name}"; $new_image = imagecreatetruecolor(100, 100); $source_image = imagecreatefrompng($image); imagealphablending($source_image,...

java,android,image,barcode,zxing

I need to generate barcode in 128A format with data: 900000588548001100001305000000000207201512345.6|12345.7 I'm using ZXing library and Here is my method: private void barcodeGenerator(String data) { try { com.google.zxing.MultiFormatWriter writer = new MultiFormatWriter(); BitMatrix bm = writer.encode(data, BarcodeFormat.CODE_128, 700, 200); Bitmap ImageBitmap = Bitmap.createBitmap(700, 200, Config.ARGB_8888); for (int i = 0;...