Tagged Questions

Algorithms which extract and manipulate information from digital images.

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0
votes
0answers
5 views

What should be the values of cvRTParams in opencv for a english capital characters and digit OCR?

I am developing a English handwriting Optical character recognition software in C++ using open cv. I am using the random forest classifier for classifying between 36(26 english capital letters+ 10 ...
0
votes
0answers
15 views

How to intercept Read operations and extract data to Powershell?

My employer has asked me to attempt to create a PowerShell progress bar during an Image capture or apply operation. Right now we are using DISM.exe to apply and capture images. Using Sysinternal's ...
-2
votes
0answers
17 views

line of pedestrian recognition - lack of resources

I want to recognize a line of pedestrian in an image... I found a lot about detecting pedestrian but I couldn't find any thing about what I want. I need any thing, algorithms or code
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votes
0answers
12 views

Leptonica apply threshold

I am trying to use leptonica's pixOtsuAdaptiveThreshold function but with little luck. I am not sure if I am doing it right but I am trying to take an UIImage (objective-C), apply the ...
1
vote
3answers
28 views

Which part of a bitmap file is metadata?

I have been modifying bitmap files, and I've been getting some very strange results. I think I may accidentally be changing part of the metadata. Which part is the metadata, so I know to leave it out ...
-1
votes
0answers
16 views

Warp filter for OS X

I am trying to implement warp filter. I thought that creating custom CIFilter should be easiest way to achieve expected result. But it came out that it is not as easy as I thought. There is one ...
0
votes
1answer
30 views

BackProjection image is black

Please have a look at the below code #include <iostream> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> using ...
0
votes
1answer
11 views

Matlab Query: Image Processing, Editing the Script

I am quite new to image processing and would like to produce an array that stores 10 images. After which I would like to run a for loop through some code that identifies some properties of the images, ...
2
votes
4answers
35 views

Threshold to amplify black lines

Given an image (Like the one given below) I need to convert it into a binary image (black and white pixels only). This sounds easy enough, and I have tried with two thresholding functions. The problem ...
2
votes
1answer
70 views

digital image processing - line detection in C

I am really new to digital image processing and is fixed with the below mentioned problem:- I need to write a C program which will load a ppm image file and do line detection with convolution kernels ...
3
votes
3answers
39 views

Opencv Datatype definition

Hello I wannted to access my pixels in opencv 2 in some smart way. for that I defined the following pixel structure: struct mypixels { unsigned char red; unsigned char green; unsigned ...
1
vote
0answers
26 views

Iterating through a grayscale image

I have used the CIMaximumComponent to convert the image being displayed on the screen to grayscale. Now I want to iterate through the grayscale image and apply a threshold such that if the intensity ...
2
votes
3answers
56 views

Is there an easy to use Image library for simple operations (read,write,rotate,re-size)?

My use case is pretty simple which I think is shared with many other developers. I would like to: 1. Load an image 2. Read EXIF Orientation details (If available) 3. Rotate (90, 180, 270) ...
1
vote
1answer
27 views

How should I prepare positive images for HAAR training for hand detection?

I am using this dataset: http://www.robots.ox.ac.uk/~vgg/data/hands/ However, I am only going to use hands which are > 4200 sq pixels in area, which leaves me with just 621 hands. I realised that ...
0
votes
0answers
10 views

Kinect Frame saving error

I am working with Kinect. I want to save all the frame from Color Stream, Depth stream and all the body joint positions. The rate for color and depth is 640 x 480 at 30Fps. I want to work with all ...

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