README-en.md edited on August 3, 2016 at 3:40pm

README-en.md

@@ -39,7 +39,7 @@ Before coming to the laboratory session you should have:
 
 ## Image Editing
 
-In this laboratory experience, you will work with various concepts and basic skills of image editing. We have provided a simple graphical user interface that allows the user to load an image and invert it vertically and horizontally. Your task is to create and implement a function to convert the colored image into an image with gray tones, and another function that converts the colored image into a black and white image.
+In this laboratory experience, you will work with various concepts and basic skills of image editing. We have provided a simple graphical user interface that allows the user to load an image and invert it vertically and horizontally. Your task is to create and implement a function that converts a colored image into an image with gray tones, and another function that converts the colored image into a black and white image.
 
 ### Pixels
 
@@ -53,11 +53,12 @@ The smallest element in an image is called a *pixel*. This unit consists of a si
 
 ---
 
-`Qt` uses the `QRgb` type to represent `RGB` values. Using certain functions that are described below we can obtain the red, green and blue components of the `QRgb` value of the pixel and manipulate the images.
+`Qt` uses the `QRgb` type of data to represent `RGB` values. Using certain functions that are described below, we can obtain the red, green, and blue components of the `QRgb` value of the pixel and manipulate the images.
+
 
 ### Library
 
-In today's laboratory experience you will use the `QImage` class. This class allows access to the data in the pixels of an image to manipulate it. The documentation for the `QImage` class can be found in http://doc.qt.io/qt-4.8/qimage.html.
+In today's laboratory experience you will use the `QImage` class. This class allows access to the data in the pixels of an image in order to manipulate it. The documentation for the `QImage` class can be found in http://doc.qt.io/qt-4.8/qimage.html.
 
 The code provided in this project contains the following objects of the `QImage` class:
 
@@ -186,13 +187,15 @@ In today's laboratory experience, you will design and implement simple image pro
 
 ### Exercise 2 - Convert a Colored Image to an Image with Gray Tones
 
-Image grayscale is an operation that is used to convert a colored image to an image with only tones of gray. To make this conversion the following formula is used in each pixel:
+Image grayscale is an operation that is used to convert a colored image to an image with tones of gray only. To make this conversion the following formula is used in each pixel:
+ 
  `gray = (red * 11 + green * 16 + blue * 5)/32 ;` where `red`, `green` and `blue` are the values for the tones of the red, green and blue colors in the pixel of the original colored image, and `gray` will be the assigned color to the red, green, and blue colors in the pixel of the edited image. That is,
+
 `editedImage.setPixel( i, j, qRgb(gray, gray, gray) )`.
 
 #### Instructions
 
-1. Using pseudocode, express the algorithm to convert a colored image to an image with only gray tones. The appendix in this document contains some advice about good techniques for writing pseudocode.
+1. Using pseudocode, express the algorithm to convert a colored image to an image with gray tones only. The appendix in this document contains some advice about good techniques for writing pseudocode.
 
 2. Complete the `GreyScale` function in the `filter.cpp` file to implement the grayscale algorithm. The function should produce a result similar to that in Figure 3, where the image on the left is the original image and the one on the right is the edited image.