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Philip


University of Surrey

Active since 2011

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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 ...

mehr als 9 Jahre ago | 2 answers | 0

2

answers

Question


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...

mehr als 9 Jahre ago | 2 answers | 0

2

answers

Question


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...

mehr als 9 Jahre ago | 0 answers | 0

0

answers

Question


Image data as a sine wave?
Does anybody know if it is possible to represent image data as a sine wave?

mehr als 9 Jahre ago | 1 answer | 0

1

answer

Question


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...

mehr als 9 Jahre ago | 0 answers | 0

0

answers

Question


'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...

mehr als 9 Jahre ago | 1 answer | 0

1

answer

Question


Find smallest cell in cell array
Is there a way to find the smallest sized cell in a cell array? Thanks!

mehr als 9 Jahre ago | 1 answer | 0

1

answer

Answered
Dump 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...

mehr als 9 Jahre ago | 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...

mehr als 9 Jahre ago | 3 answers | 0

3

answers

Question


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...

mehr als 9 Jahre ago | 3 answers | 0

3

answers

Question


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...

fast 10 Jahre ago | 1 answer | 0

1

answer

Question


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...

fast 10 Jahre ago | 4 answers | 1

4

answers

Question


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... ...

fast 10 Jahre ago | 3 answers | 0

3

answers

Question


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" (...

etwa 10 Jahre ago | 1 answer | 0

1

answer

Question


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...

etwa 10 Jahre ago | 2 answers | 1

2

answers

Question


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 ...

etwa 10 Jahre ago | 2 answers | 0

2

answers

Question


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...

etwa 10 Jahre ago | 3 answers | 1

3

answers

Question


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...

etwa 10 Jahre ago | 1 answer | 0

1

answer

Question


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...

etwa 10 Jahre ago | 2 answers | 0

2

answers

Question


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...

etwa 10 Jahre ago | 2 answers | 0

2

answers

Question


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...

etwa 10 Jahre ago | 2 answers | 0

2

answers

Question


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...

etwa 10 Jahre ago | 2 answers | 0

2

answers

Question


sort a structure
Is it possible to create a structure that holds the following information: * id_number * length such that I can then sort...

etwa 10 Jahre ago | 1 answer | 0

1

answer

Question


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...

etwa 10 Jahre ago | 1 answer | 0

1

answer

Question


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 ...

etwa 10 Jahre ago | 2 answers | 0

2

answers

Question


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...

etwa 10 Jahre ago | 1 answer | 0

1

answer

Question


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...

mehr als 10 Jahre ago | 3 answers | 3

3

answers

Answered
"Fill" Binary Image
Thanks for your help! I really must read the literature for morphological operations... The erode and dilate methodology seems...

mehr als 10 Jahre ago | 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...

mehr als 10 Jahre ago | 3 answers | 0

3

answers

Question


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...

mehr als 10 Jahre ago | 1 answer | 0

1

answer

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