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program代写 This project adopts the object-oriented principle, slightly changed the Image class, and implemented a Manipulator class.

1.Description

This project adopts the object-oriented principle, slightly changed the Image class, and implemented a Manipulator class. The main functions are encapsulated in the class.program代写

The image read in the constructor is saved in the member variable “img_”, and all subsequent operations on this image generate a copy of this member variable and write it to a new file. When the program operates the picture, it does not affect other operations.

Class diagram is as follows.

2.Pseudocode

2.1 Show R/G/B channels

  Image channel_filter(Image img, Channel channel):

      tmp_img = img

  for i from 0 to (tmp_img.w * tmp_ing.h):

      if channel == Red:

            tmp_img[i] *= kRed

        else if channel == Green:

            tmp_img[i] *= kGreen

        else if channel == Blue:

            tmp_img[i] *= kBlue

    return tmp_img

2.2 Change brightness

Image img_lighter(Image img, float light_rate):

      tmp_img = img

      for i from 0 to (tmp_img.w * tmp_ing.h):

          Rgb rate = Rgb(1 + light_rate, 1 + light_rate, 1 + light_rate)

          tmp_img[i] *= rate

          if (tmp_img[i].r > 1)

              tmp_img[i].r = 1;

          if (tmp_img[i].g > 1)

              tmp_img[i].g = 1;

          if (tmp_img[i].b > 1)

              tmp_img[i].b = 1;

          if (tmp_img[i].r < 0)

              tmp_img[i].r = 0;

          if (tmp_img[i].g < 0)

              tmp_img[i].g = 0;

          if (tmp_img[i].b < 0)

              tmp_img[i].b = 0;

    return tmp_img

3.Results

3.1 Select file

3.2 Show red channel

3.3 Show green channel

3.4 Show blue channel

3.5 Brightness increases by 0.2

3.6 Brightness decreases by 0.3

4.Analysis

This program basically implements the requirements mentioned in the documentation, but there are a few points that can be optimized. First, you can reimplement the Image class. Using C-style dynamic arrays as members of a class has drawbacks, especially when copying objects. Re-implementing it to the style of the stl template library avoids this inconvenience. In addition, the member variable property in the Image class is public, which does not conform to the encapsulation of the class. It is best to change its property to private and implement the get and set methods.program代写

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