Cuda Modifier

This project is based on the use of CUDA and the FreeImage library. The objectives of this project are multiple and include the black-and-white effect, edge detection, colour saturation, among others. To do this, we modify an image by performing several transformations on all or part of it. An image is an array of pixels encoded according to the RGB standard, where each pixel has three components: R (red), G (green) and B (blue). FreeImage is an open-source library that provides functionality for image manipulation, including loading, saving and converting a wide variety of image formats.

How to ?

This program uses the arguments given at program startup to apply filters and effects to the image, if a filter option is not given (if the filter needs one) the default value will be used.

./modif_cuda --

List of availables options:

• sobel | Apply Sobel filter for edge detection Level: Integer number to define black to white in the result Default: 5000

• canny | Apply Canny filter for edge detection Level: Integer number to define black to white in the result. Default: 1

• popart | Apply a pop-art filter with 4 same images with 4 differents saturation filter (blue/red/green/grey)

• resize | Resize image factor: Double number for the resizing factor, it will be (width/height*factor), to divide the size, use > 1 numbers, ie: size/2 = 0.5. Default : 0.5

• only | Keep only one colour on the pixels Colors: RED/BLUE/GREEN/GREENBLUE/GREENRED/REDBLUE

• saturation | Saturate a colour on the pixels Colors: RED/BLUE/GREEN/CYAN/GREY/YELLOW/MAGENTA

• sym | Apply an horizontal symmetry

• blur | Apply a blur effect Iterations: Integer number, how many time the blur effect will be done, at minimum 20 iterations is recommended Default: 20

• output | Custom output image name Name: String value, will still be stored in the ./output/ directory Default: new_img.png

• input | Custom input image name Name: String value, will still be retrieved from the ./input/ directory Default: img.png

• help | Prints help message and exits program

/!\ The order of the arguments is necessary, the actions will be executed in order. If for example, you perform a filter before modifying the input file, then the filter will be done on the base image.

Example: ./modif_cuda --saturation RED

Existing filters

• Sobel
• Canny
• Resize
• Only
  • Red
  • Blue
  • Green
  • Green-Red
  • Green-Blue
  • Red-Blue
• Diapositive
• Blur
• Saturation
  • Blue
  • Red
  • Green
  • Cyan
  • Grey
  • Yellow
  • Magenta
• Horizontal symmetry
• Pop-art