Philip
University of Surrey
57 total contributions since 2011Philip's Badges
Accept 20 answers given by other contributors
Awarded to Philip on 20 Jul 2017
Provide your first answer ever to someone else's question
Awarded to Philip on 20 Jul 2017
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 ...
fast 9 Jahre ago | 2 answers | 0
2
answersQuestion
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...
fast 9 Jahre ago | 2 answers | 0
2
answersQuestion
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...
fast 9 Jahre ago | 0 answers | 0
0
answersQuestion
Image data as a sine wave?
Does anybody know if it is possible to represent image data as a sine wave?
fast 9 Jahre ago | 1 answer | 0
1
answerQuestion
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...
fast 9 Jahre ago | 0 answers | 0
0
answersQuestion
'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...
fast 9 Jahre ago | 1 answer | 0
1
answerQuestion
Find smallest cell in cell array
Is there a way to find the smallest sized cell in a cell array? Thanks!
etwa 9 Jahre ago | 1 answer | 0
1
answerDump 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...
etwa 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...
etwa 9 Jahre ago | 3 answers | 0
3
answersQuestion
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...
etwa 9 Jahre ago | 3 answers | 0
3
answersQuestion
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...
etwa 9 Jahre ago | 1 answer | 0
1
answerQuestion
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...
etwa 9 Jahre ago | 4 answers | 1
4
answersQuestion
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... ...
mehr als 9 Jahre ago | 3 answers | 0
3
answersQuestion
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" (...
mehr als 9 Jahre ago | 1 answer | 0
1
answerQuestion
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...
mehr als 9 Jahre ago | 2 answers | 1
2
answersQuestion
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 ...
mehr als 9 Jahre ago | 2 answers | 0
2
answersQuestion
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...
mehr als 9 Jahre ago | 3 answers | 1
3
answersQuestion
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...
mehr als 9 Jahre ago | 1 answer | 0
1
answerQuestion
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...
mehr als 9 Jahre ago | 2 answers | 0
2
answersQuestion
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...
mehr als 9 Jahre ago | 2 answers | 0
2
answersQuestion
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...
mehr als 9 Jahre ago | 2 answers | 0
2
answersQuestion
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...
mehr als 9 Jahre ago | 2 answers | 0
2
answersQuestion
sort a structure
Is it possible to create a structure that holds the following information: * id_number * length such that I can then sort...
mehr als 9 Jahre ago | 1 answer | 0
1
answerQuestion
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...
mehr als 9 Jahre ago | 1 answer | 0
1
answerQuestion
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 ...
mehr als 9 Jahre ago | 2 answers | 0
2
answersQuestion
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...
mehr als 9 Jahre ago | 1 answer | 0
1
answerQuestion
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...
fast 10 Jahre ago | 3 answers | 3
3
answers"Fill" Binary Image
Thanks for your help! I really must read the literature for morphological operations... The erode and dilate methodology seems...
fast 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...
fast 10 Jahre ago | 3 answers | 0
3
answersQuestion
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...
fast 10 Jahre ago | 1 answer | 0
1
answer
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