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Accept 20 answers given by other contributors
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Feeds
Question
drawing on an image in loop
How can I draw on an from loop iterations, without 'imread' and 'imwrite'? EDIT: Inside the loop, I am doing some processing ...
environ 12 ans il y a | 2 réponses | 0
2
réponsesQuestion
Auto fill an image based on edge line
Is there a way to automatically fill an image (as though using the paint bucket tool in Photoshop) based on a line that runs fro...
environ 12 ans il y a | 2 réponses | 0
2
réponsesQuestion
Analyse the "Gibbs Phenomenon" from Image Data
Slightly related to my previous post regarding the ringing artifact in compressed images, I have a question regarding the Gibb's...
environ 12 ans il y a | 1 réponse | 0
0
réponseQuestion
Image data as a sine wave?
Does anybody know if it is possible to represent image data as a sine wave?
environ 12 ans il y a | 1 réponse | 0
1
réponseQuestion
What statistical features can I use to distinguish these images?
I have two 25x25 pixel images that are quite similar: A: http://imageshack.us/photo/my-images/546/18lwin.png/ B: http://imag...
environ 12 ans il y a | 1 réponse | 0
0
réponseQuestion
'closeness' of multiple vectors
Is there a way to compute how 'closely' a data vector matches another? For example: A = [1 2 3 4 5]; B = [1 2 3 4 5...
environ 12 ans il y a | 1 réponse | 0
1
réponseQuestion
Find smallest cell in cell array
Is there a way to find the smallest sized cell in a cell array? Thanks!
plus de 12 ans il y a | 1 réponse | 0
1
réponseDump Image Pixels into vector from coordinates
On a similar note, is there any way that I can replace the following loop: label_ids = [1 3 11 24 55]; map = zeros(heigh...
plus de 12 ans il y a | 0
Question
Dump Image Pixels into vector from coordinates
Is there a way to use 2 vectors of pixel coordinates to quickly dump the pixel values into a 3rd vector? Currently, I am usin...
plus de 12 ans il y a | 3 réponses | 0
3
réponsesQuestion
Image Edges: Calculate complexity of a line segment?
Can anyone suggest a good way to calculate the 'complexity' of a line segment (obtained from 'bwlabel' after 'canny' edge detect...
plus de 12 ans il y a | 3 réponses | 0
3
réponsesQuestion
Image Processing: Near/Far Objects
Does anyone know of any techniques that make it possible to work out how close an object is to the camera (when the image was ca...
plus de 12 ans il y a | 1 réponse | 0
1
réponseQuestion
Canny Edge Detection - Automatic/Adaptive Thresholding
I have read in the docs for the 'edge' function that when a low and high threshold are not defined when calling the 'canny' edge...
plus de 12 ans il y a | 4 réponses | 1
4
réponsesQuestion
Sobel Edge Thresholds
I would like to test several sobel edge threshold values to identify which threshold is the best suited to a particular task... ...
plus de 12 ans il y a | 3 réponses | 0
3
réponsesQuestion
Change how this plot looks
Is there a way to modify the attached plot in MATLAB, such that it contains another y-axis on the right hand side called "ADR" (...
plus de 12 ans il y a | 1 réponse | 0
1
réponseQuestion
Extract all red pixels from image to binary image
Does anybody know of a way to extract all 'red' values [255 0 0] from an image to make a binary image where 1's indicate the loc...
plus de 12 ans il y a | 2 réponses | 1
2
réponsesQuestion
Dilate a line and color both sides
Does anyone know if it's possible to dilate a line in an image, such that one side of the original line is colored red, and the ...
plus de 12 ans il y a | 2 réponses | 0
2
réponsesQuestion
Create new binary image from pixel values of another image
I have a grayscale uint8 image, and I want to create a second image that is mostly zeros, but has a 1 wherever the pixel value i...
plus de 12 ans il y a | 3 réponses | 1
3
réponsesQuestion
Dictionaries of Hashtables in MATLAB?
Hi all, Is there a way to create a hash table or dictionary in MATLAB such that I can retrieve a set of values based on a key...
plus de 12 ans il y a | 2 réponses | 0
2
réponsesQuestion
Draw a straight line in image, given an angle
Is there a way to draw a straight line in an image from a starting (x,y) coordinate, such that the line is equivalent to a speci...
presque 13 ans il y a | 2 réponses | 0
2
réponsesQuestion
Rotate image about a specified pixel coordinate
Does anyone know of a way to rotate an image about a specified pixel coordinate? If I have the pixel coordinates (50,55) for ex...
presque 13 ans il y a | 2 réponses | 0
2
réponsesQuestion
Normal vector of line based on pixel coordinates
I have an array that contains the x,y pixel coordinates of edges in an image. I want to use three of these coordinates at a tim...
presque 13 ans il y a | 2 réponses | 1
2
réponsesQuestion
Image Processing: Break straight lines
I have an edge image of a square, and would like to treat it as 4 separate lines: 2 horizontal and 2 vertical. Is there a way t...
presque 13 ans il y a | 2 réponses | 0
2
réponsesQuestion
sort a structure
Is it possible to create a structure that holds the following information: * id_number * length such that I can then sort...
presque 13 ans il y a | 1 réponse | 0
1
réponseQuestion
Image Processing: Find nearest nonzero pixel value to specified pixel coordinates
Is there a way to find the closest non-zero pixel value to specified x,y coordinates of an image by shifting only the horizontal...
presque 13 ans il y a | 1 réponse | 0
1
réponseQuestion
Image Processing: Find Edge with Highest Contrast
Is it possible to scan an image to find only the edge with the highest dynamic range to its left and right. At first I want to ...
presque 13 ans il y a | 2 réponses | 0
2
réponsesQuestion
Image Processing: Keep only highest "intensity" values
Does anyone know of a way that I can reduce the following image to an image that only includes the highest intensities (for want...
presque 13 ans il y a | 1 réponse | 0
1
réponseQuestion
Stop exponential answers
Dear all, I have two values representing the max and min of a data vector. max_val = 0.9855; min_val = 0.9851; Bot...
environ 13 ans il y a | 3 réponses | 3
3
réponses"Fill" Binary Image
Thanks for your help! I really must read the literature for morphological operations... The erode and dilate methodology seems...
environ 13 ans il y a | 0
Question
"Fill" Binary Image
Hi, Is there a way to "fill" a binary image such that textured regions become black? As an example, I would like to make thi...
environ 13 ans il y a | 3 réponses | 0
3
réponsesQuestion
Edge direction
Is there a function to check if an edge changes direction? I have used bwlabel to work on connected edges, but now I only w...
environ 13 ans il y a | 1 réponse | 0
1
réponse
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