C/C++ :: Enable User To Upload Image And Convert It Into ASCII Text Using SDL
Apr 29, 2015
Using C . I have been tasked (for a University assignment) to create a program that will enable a user to upload an image and convert that image into ASCII text using SDL on a Linux system. I've managed to open a window, display an image (non-selected) and convert it into grayscale using
case SDLK_g:
for (int y = 0; y < image->h; y++) {
for (int x = 0; x < image->w; x++) {
Uint32 pixel = pixels[y * image->w + x];
Uint8 r = pixel >> 16 & 0xFF;
Uint8 g = pixel >> 8 & 0xFF;
Uint8 b = pixel & 0xFF;
Uint8 v = (0.212671*r)+(0.715160*g)+(0.072169*B)/>;
pixel = (0xFF << 24) | (v << 16) | (v << 8) | v;
pixels[y * image->w + x] = pixel;
I am absolutely clueless as to how I can get the user to upload an image to the program and then begin the image -> ASCII conversion. I've found seem to be written in C++ or C# to make the conversion I should be using the GetPixelColour command?
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{ string filePath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\DG1.txt "; if(File.Exists(filePath)) { StreamReader reader = new StreamReader(filePath); string line = reader.ReadLine();
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#include <iostream> using namespace std; int main() { cout<<"Text to ASCII converter"<<endl<<"Enter text to convert into ASCII - "; char text; //defining input type, which is single character
[Code] ....
Try it here - URL.....Is there any way to run a similar program, which converts a string with spaces into ASCII code?
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Code: #include <stdio.h> #include <string.h> #include <stdlib.h> int main(void){
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I need to make program which converts text (letters and digits only) into 7-digit ascii code. The start and end code is "1100011", so it must not appear inside the output code, thus a zero should be added in it (11000011).
Not that it matters much what my task is - I have a problem. Here's the code:
Code: #include <iostream> #include <stdlib.h> using namespace std; int main() { string in,out="",pk="1100011"; getline(cin,in);
[Code] ....
The 'pk' string loses its value here when I enter a character in the input and I cant figure out why... I got that the problem is somewhere in the first if loop, since the code prints pk nicely when cout is before the loop (comment 1)..however, after the loop (comment 2) it prints nothing..... When compiled, it works nice when I input numbers, but 1 character - and 'pk' disappears...
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compiled with -std=c99.
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[URL] ....
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In short I'm converting a floating point bilinear image resampling routine into one that only uses fixed point arithmetic. I've gotten rid of nearly all the floats now, in fact all but one and the results at the moment are in distinguishable from the floating point version. It's a maths issue really. Some pseudocode goes like this.
Code: for( int xx=0; xx<ow; xx++ ) { int_center = (ccx >> 16); int temp = xx * 2; for (j = int_center; j <= int_center + 1; j++)
[Code] ....
Where ccx is and integer error accumulator that gives me a scaled integer. Shifting down buy 16 gives me the relative pixel I need to be working on. The line just after where the inner loop begins is where I have the last remaining float. FILTER_FACTOR is essentially a percentage by which I scale the error accumulator to the correct amount.
For example.
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Code:
#include <stdio.h> #include <string.h> int main() { char string[100], ch; int c = 0, count[26] = {0}; printf("Enter a string
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