Image enhancement, Electrical Engineering

Assignment Help:

Explain briefly the operation, draw the functions, formulas and observations.

(i) Write an m-file "imnorm.m" which takes an image finds min and max values and uses them to normalize the image.

What kind of image enhancement operation is performed within that function? Draw an illustration.

Write an m-file for each of the following operations:
(ii) compute negative image (neg.m)

(iii) apply power law transform with a superscript 0.2 (powlaw.m)

(iv) perform histogram equalization of an image (hist_eq.m)
           it should display 5 figures:
                        the input image and its histogram
                        the integral histogram
                        the output image and its histogram
            the following function will give you a histogram of pixel values between 0 and 255
            h=sum(hist(im,[0:255])'); %help hist; help sum;
      stem(h,'.k');

function imh=hist_eq(im);
figure(1);
imshow(?);

h=?
figure(2)
stem(?);

% compute integral image
hint=h;
for i=2:256           
hint(i)=hint(i-1)+h(i);
end

hint=255*hint/hint(end); %normalize the integral histogram to have values between 0 and 255
figure(3)
stem(?);

imh=hint(im);%modify pixel intensities
imh=uint8(imh);%normalize to byte values
figure(4)
imshow(?)

h=?
figure(5)
stem(?);

What histogram equalization does? What should be the shape of the output histogram? Why it isn't?


Related Discussions:- Image enhancement

Draw a block diagramfor a 2-to-4 decoder, Q. Draw a block diagramfor a 2-to...

Q. Draw a block diagramfor a 2-to-4 decoder. Obtain the truth table, and develop a logic diagram.

Biomedical question, Find the rms voltage of the given cardiac wave

Find the rms voltage of the given cardiac wave

Schematic symbols, Schematic Symbols The junction gate field-effect t...

Schematic Symbols The junction gate field-effect transistor or JFET gate is sometimes drawn in the middle of the channel (in place of at the drain or source electrode as in t

Relationship between the induced e.m.f and the network, Mathematical relati...

Mathematical relationship between the induced e.m.f and the network Faraday noted that the e.m.f induced in a loop is proportional to the rate of change of magnetic flux by it:

What do you mean by heat sink?, Q. What is a heat sink? List the factors, w...

Q. What is a heat sink? List the factors, which determine its efficiency. To reduce the chance of thermal runaway, the rise of temperature at the collector junction to a danger

Differences between a timer and a counter, Question : a) Embedded Syste...

Question : a) Embedded Systems will be Hard Real-Time Systems, Soft Real-Time Systems and Hybrid Real-Time Systems. Briefly explain all three types of Real-Time Systems, using

What do you mean by induction, Q. What do you mean by Induction? The es...

Q. What do you mean by Induction? The essentials for producing an emf bymagneticmeans are electric andmagnetic circuits,mutually interlinked. Figure (a) shows a load (or sink o

Transformer, how back emf is produced in transformer?

how back emf is produced in transformer?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd