59
votes
Object detection and localization using neural network
Introduction
An object detection problem can be approached as either a classification problem or a regression problem. As a classification problem, the image is divided into small patches, each of ...
- 27.8k
16
votes
Accepted
Find lane lines
ImageLines expects an input image where the "line" pixels are white and the other pixels are dark, so unless you're looking at bubble chamber images, you're ...
- 36.4k
14
votes
Accepted
Nontrivial background removal
1.This method is from documentation of function ClusterClassify
...
- 27.2k
13
votes
Accepted
How to TextRecognize a screenshot of code?
If you are truly interested in this topic, you need to go deeper. TextRecognize uses Tesseract under the hood and getting familiar with how to train its ML ...
- 113k
11
votes
Object detection and localization using neural network
Mathematica 11.2 has undocumented functions: ImageContents, ImageCases, ImageBoundingBoxes, <...
- 9,621
11
votes
How to track a deformable rod in video?
Since the object you want to track is moving slowly, you can use ImageDisplacements to calculate a per-pixel optical flow:
...
- 36.4k
9
votes
Noisy and vague shape recognition
Closest I can get with minimal input from the user. The key here is to pull an example object from one dataset to use for image correlation. (A strategy borrowed from this answer).
...
- 19.8k
8
votes
Adding computer vision datasets?
It seems that Wolfram Data Repository can be used to share data using ResourceObject. Here is a simple example:
...
- 27.8k
8
votes
Extract partitions of images after edge detection
MorphologicalComponents seems like a promising way to go, like High Performance Mark says. So let's try it:
...
- 71.2k
8
votes
Accepted
Efficient multicolor search
An alternative approach might be to use the built-in ImageDistance function.
...
- 69.7k
7
votes
Efficient multicolor search
Here's a NearestFunction that will do what you did with Table:
...
- 24.8k
7
votes
How to detect rectangles with certain colors in an image?
Here's my take at the issue (some comments are inlined)
...
- 2,125
7
votes
Accepted
Extract partitions of images after edge detection
img = Import["https://i.sstatic.net/e4dN6.jpg"];
Binarize // MorphologicalTransform // ComponentMeasurements // ImageTrim
...
- 401k
6
votes
Accepted
Recognizing a Higher Percentage of Multiple Barcodes from an Image
Here is a partial answer. Hopefully someone else can improve it.
BarcodeRecognize seems to work better with isolated barcodes. This can be accomplished using ...
- 9,111
6
votes
Find lane lines
The existing answers are based on the ImageLines function, here I'm providing an answer based on the geometric transformations, which can work in curved roads as ...
- 27.8k
6
votes
Find lane lines
I played around a bit and the main functions I think help are RemoveBackground, Binarize and ...
- 2,412
6
votes
Nontrivial background removal
Here's a method that could be iterated and refined to replicate the opencv result, I think.
First we use the ClusterClassify method of yobe then we simply fill in ...
- 47.1k
6
votes
How to import Robinhood screenshots?
So for reasons unknown TextRecognize hangs indefinitely on my computer. On the other hand, here's a way to get images that ...
- 47.1k
5
votes
Extract names from a document
You may use the functions in the Text Analysis guide to extract the "NounPhrase"s containing "ProperNoun"s. This gives a short ...
- 43.2k
3
votes
Accepted
Speeding up ImageCorrespondingPoints
Finally, I did some runtime testing with the above images in terms of size and using different transformation classes without using any masking.
For the size-considerations I simply resized the whole ...
- 1,275
3
votes
3
votes
What is the algorithm applied by ImageAdjust[image,{c,b,gamma}]
This is stated in the documentation (third example in Properties & Relations)
ImageAdjust[image,{c,b,γ}] is equivalent to ImageApply[Clip[(b+1)(c+1)#^γ - c/2, {0, 1}]&, image]
- 85.4k
2
votes
2
votes
Robust face detection
In version 12, functions such as ImageCases and ImageBoundingBoxes exist that will do this job better than ...
- 13.2k
1
vote
Robust method to find vertical lines in image
I guess, the simplest way is to use the built-in function ImageLines
...
- 5,209
1
vote
1
vote
Accepted
Best laptop specs for a better and faster numerical simulations
Mathematica as far as I've understood can do parallel processing...and does support some CUDA things.
To use Mathematica's built-in GPU computing capabilities, you will
need a dual-precision ...
- 3,051
1
vote
How to TextRecognize a screenshot of code?
i = Import["https://i.imgur.com/mCVtdHh.png", "PNG"];
TextRecognize[ColorNegate[Sharpen[i]]]
"11111:: 'lemStr = toLLVMIR[\"C++20\", \"
uinclude ninclude ...
- 19
1
vote
How to do the "Sketch colorization" like Project Scribbler using Mathematica?
I assume the "sketch" is secondary here. Once you master general colorization you can try adopting it for sketches. Potentially you can experiment with training data and neural net structures. I will ...
- 73.4k
1
vote
How to write a RCNN (region-cnn)?
Not a complete answer, but I think the newly introduced spatial transformer layer can be used to conduct roi pooling, with 0 as the inputs to the skew x and y parameters. I can't think of any other ...
- 278
Only top scored, non community-wiki answers of a minimum length are eligible