Skip to main content

Coding Problem: Based on Caesar Cypher

This a coding problem based on Caesar Cypher(or Cipher). Caesar Cipher Technique is a simple and easy method of encryption. It is a simple type of substitution cipher in which each letter of plain text is replaced by a letter with some fixed number of positions down with alphabet. This is used in a way:

Given:
a=z 
b=y
............ z=a

For example:
Input: abc
Output should Be:  zyx

Code:

Labels:

Popular posts from this blog

Coding Problem: Sober Walk

Our hoary culture had several great persons since time immemorial and king vikramaditya’s nava ratnas(nine gems) belongs to this ilk. They are named in the following shloka: Among these, Varahamihira was an astrologer of eminence and his book Brihat Jataak is recokened as the ultimate authority in astrology. He was once talking with Amarasimha,another gem among the nava ratnas and the author of Sanskrit thesaurus, Amarakosha. Amarasimha wanted to know the final position of a person, who starts from the origin 0 0 and travels per following scheme.     He first turns and travels 10 units of distance     His second turn is upward for 20 units     Third turn is to the left for 30 units     Fourth turn is the downward for 40 units     Fifth turn is to the right(again) for 50 units … And thus he travels, every time increasing the travel distance by 10 units. Code:
Read more

Image to Pencil Sketch using Python and OpenCV

In this post, we will go through a program to get a pencil sketch from an image using python and OpenCV.  Step 1:  To use OpenCV, import the library. Step 2: Read the Image. Step 3: Create a new image by converting the original image to grayscale. Step 4: Invert the grayscale image. We can invert images simply by subtracting from 255, as grayscale images are 8 bit images or have a maximum of 256 tones. Step 5: Blur the inverted image using GaussianBlur  method in OpenCV library and invert the blurred image.  Step 6: Divide the grayscale values of the image by the values of image received from step-5 ( Note: We inverted the grayscale image and we blurred this image and then again inverted it ). Diving an image from its smoothened form will highlight the edges and we get the image like Pencil Sketch. Steps Illustration: Code: Execution Output:
Read more