Developer Forum

hello!

first problem is how could i convert RGB to HVC color space? there is
no function implemented in matlab i think. does anyone got the code
for that?

second problem is to find the largest pixel count in an image. how
could i realize that in a fast way?

thanks for your help!

kind regards,
sebastian

Sebastian:
<SNIP two minor imaging issues...

1) RGB to HSV conversion:

help rgb2hsv

2) largest pel count (?)
try:

max(img(:))

or let CSSM know if we misunderstood you
us

1) sorry but i mean HVC color space which seems to be a different one
from the definition. could give u a link to a paper if u want. please
ask if needed.

2) is solved i think. meant it in a different way.

thanks for ur help
sebastian

Sebastian:
<SNIP <us> was careless...
1) sorry but i mean HVC color space

sorry for my hasty reply! i cannot be of any help - let's hope
<john d'errico> sees this thread!

us

i was having trouble writing the code for the same....and well anyone
out there to help me out with!?

hi
im working on image retrieval and am stuck up at the very beginning
of my approach. how to i read the .tif files to my main code and well
in working in basic RGB. how do i get the avrage color of an
image....i.e. the vector in the 3D.
any suggestions are welcome...
regards
sandhya

sandhya nathaniel:
<SNIP reading and meaning a tiff...

two hints:

help imread
help mean

us

I am looking for MATLAB code in the image retrieval area. More
precisely, it should be a GUI interface that display the query image
and the best match (or several top matches) found after browsing
through the image database. The similarity retrieval should be done by
comparing regions colour histograms. The regions are obtained by the
quadtree decomposition algorythm.

Thanks

Hi all,

I need your helps to solve my problem:

Actually I need to extract similar images to input image from image
database. Each image will be represented by one vector which its
element is one feature of image. Let say I use 15-element vector to
characterize one image. My problem is that I have no idea how to
store these feature vectors so that searching time can be optimized
and also no idea which algorithm supports comparison of those vectors
efficiently and quickly as much as possible.

Thanks so much for any idea.

Hi there,

Im trying to develop an image retrieval system ysing matlab.
I intend to use the histogram data to find similar images.
Has anyone done something similar or have andy suggestions??

Hey
i'm working on content based image retrieval
1. could anyone pls help me out with the data matching techniques
2. how do u read the contents in a file and assign them to a temporary variable?

pls somebody help me out
i'm new to matlab

doc imread

% to read the contents in a file and assign them to a temporary variable:

A = imread(filename)

--------------------------------------------------------
Mohamed:
1. Start here: http://www.yqcomputer.com/
or here:
http://www.yqcomputer.com/ +based+image&hl=en&lr=&btnG=Search

2. Use the imread command in the image processing toolbox.
Good luck,
ImageAnalyst

hi, i'm a student in artificial intelligence , i need any code for"
image retrieval" ,please help me
bests

---------------------------------------------------------------------------
Look at the documentation for imread().