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2019-02-19 07:18:52 -0500 commented answer How to locate an object on the image?

I said :) Usually the author of a question closes it then he is satisfied. This particular question is closed, but not t

2019-02-19 03:56:49 -0500 received badge  Self-Learner (source)
2019-02-19 03:22:17 -0500 answered a question How to locate an object on the image?

The task is solved using convexHull() function. vector<vector<Point> > contours_poly(contours.size()); ve

2019-02-18 03:22:02 -0500 edited question How to locate an object on the image?

How to locate an object on the image? Suppose there is black background with a gray object. What is the best way to d

2019-02-18 01:09:23 -0500 asked a question How to locate an object on the image?

How to locate an object on the image? Suppose there is black background with a gray object. What is the best way to d

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2019-02-14 07:00:27 -0500 edited question How to incorporate white into color system?

How to incorporate white into color system? P.S. An important update to answer 2. In comparison to RGB, HSV is convenie

2019-02-14 06:52:52 -0500 edited answer How to incorporate white into color system?

2 steps are required: Split the image into 3 planes: h, s, v. Create the histogram of h-plane. Filter out color

2019-02-11 10:29:40 -0500 commented question Hue thresholding

This is better, but still mask is an array.

2019-02-11 09:39:30 -0500 commented question Hue thresholding

inRange should work too, only it requires more arrays so consumes more memory. This may be a problem for large images.

2019-02-11 09:34:11 -0500 commented answer Hue thresholding

Classical bug. Did you ever use de-bug-ger? :) If it is about threshold in general, not python-specific - come on, ask.

2019-02-11 09:21:07 -0500 received badge  Self-Learner (source)
2019-02-11 07:58:28 -0500 answered a question Hue thresholding

There was a bug in my program, not in OpenCV. More lines of code were needed to find it. They draw those 2 white thresho

2019-02-11 02:48:21 -0500 edited question Hue thresholding

Hue thresholding I have calculated hue histogram then filtered pixels of the source image with low hue numbers. Threshol

2019-02-11 01:55:45 -0500 asked a question Hue thresholding

Hue thresholding I have calculated hue histogram then filtered pixels of the source image with low hue numbers. Threshol

2019-01-30 23:30:46 -0500 edited answer How to incorporate white into color system?

2 steps are required: Split the image into 3 planes: h, s, v. Create the histogram of h-plane. Filter out color

2019-01-30 23:29:32 -0500 edited answer How to incorporate white into color system?

2 steps are required: Split the image into 3 planes: h, s, v. Create the histogram of h-plane. Filter out color

2019-01-30 12:54:53 -0500 answered a question How to incorporate white into color system?

2 steps are required: Split the image into 3 planes: h, s, v. Create the histogram of h-plane. Filter out color

2019-01-30 12:49:50 -0500 commented answer How to incorporate white into color system?

I agree. That is, for complete color detection we need to take into account all components, not only hue. I formulate th

2019-01-30 12:49:07 -0500 edited question How to incorporate white into color system?

How to incorporate white into color system? In comparison to RGB, HSV is convenient because it keeps color in the separa

2019-01-30 09:46:53 -0500 marked best answer How to incorporate white into color system?

P.S. An important update to answer 2.

In comparison to RGB, HSV is convenient because it keeps color in the separate channel. One problem. It does not include black and white. I don't need intensity of color(that is value), but humans do recognize black and white as separate colors.

image description image description

White is absent.

2019-01-28 12:21:01 -0500 asked a question How to incorporate white into color system?

How to incorporate white into color system? In comparison to RGB, HSV is convenient because it keeps color in the separa

2019-01-08 04:39:08 -0500 commented question How to determine the axis of a prolonged object?

Yes, this is classics. It is based on the method of least squares. Only I guess it will be not very fast? By the way, do

2019-01-08 02:13:45 -0500 asked a question How to determine the axis of a prolonged object?

How to determine the axis of a prolonged object? The angle of the line is of primary interest. I know an algorithm for

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2019-01-07 14:03:36 -0500 edited answer How to detect peaks on histograms?

I browsed this forum and no surprise - many people already asked similar questions. I will try and summarize what was ac

2019-01-07 14:01:53 -0500 edited answer How to detect peaks on histograms?

I browsed this forum and no surprise - many people already asked similar questions. I will try and summarize what was ac

2019-01-07 14:00:43 -0500 edited answer How to detect peaks on histograms?

I browsed this forum and no surprise - many people already asked similar questions. I will try and summarize what was ac

2019-01-07 13:56:51 -0500 answered a question How to detect peaks on histograms?

I browsed this forum and no surprise - many people already asked similar questions. I will try and summarize what was ac

2019-01-07 13:48:32 -0500 answered a question How to detect peaks on histograms?

I browsed this forum and no surprise - many people already asked similar questions. I will try and summarize what was ac

2019-01-07 03:55:13 -0500 asked a question How to detect peaks on histograms?

How to detect peaks on histograms? Many tasks of computer vision produce a histogram and the program must decide whether

2018-12-20 13:28:14 -0500 commented answer How to determine the angle of rotation?

Sounds good. Thanks.

2018-12-20 13:27:18 -0500 marked best answer How to determine the angle of rotation?

There is a square in an image with equal sides (that is inside another square).

image description

Does OpenCV have functions which can help to efficiently calculate the angle?

2018-12-20 12:55:19 -0500 asked a question How to determine the angle of rotation?

How to determine the angle of rotation? There is a square in an image with equal sides (that is inside another square).

2018-12-08 07:06:30 -0500 commented answer How to remove floating background?

And with Morph Open: don't know how to show image here so added it to the answer

2018-12-08 07:03:34 -0500 commented answer How to remove floating background?

And with Morph Open: don't know how to show image here so added it to the question