64 lines
1.5 KiB
Plaintext
64 lines
1.5 KiB
Plaintext
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#include "sylib.h"
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#define width 512
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#define height 1024
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int image_in[width * height];
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int image_out[width * height];
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int cutout(int val){
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if(val < 0){
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val = 0;
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}
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else{
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if(val > 255){
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val = 255;
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}
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}
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return val;
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}
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int main(){
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int i;
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int j;
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int num = getarray(image_in);
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starttime();
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j = 1;
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while(j < width - 1){
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i = 1;
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while(i < height - 1){
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int im1jm1 =(i-1)*width + j-1;
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int im1j =(i-1)*width + j;
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int im1jp1 =(i-1)*width + j+1;
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int ijm1 =(i )*width + j-1;
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int ij =(i )*width + j;
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int ijp1 =(i )*width + j+1;
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int ip1jm1 =(i+1)*width + j-1;
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int ip1j =(i+1)*width + j;
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int ip1jp1 =(i+1)*width + j+1;
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int val = 8*image_in[ij] - image_in[im1jm1] - image_in[im1j] - image_in[im1jp1] -image_in[ijm1] - image_in[ijp1] - image_in[ip1jm1] - image_in[ip1j] - image_in[ip1jp1];
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image_out[i*width + j] = cutout(val);
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i = i + 1;
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}
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j = j + 1;
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}
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i = 0;
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while(i < height){
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image_out[i * width] = image_in[i * width];
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image_out[i * width + width - 1] = image_in[i * width + width - 1];
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i = i + 1;
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}
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j = 0;
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while(j < width){
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image_out[j] = image_in[j];
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image_out[(height - 1) * width + j] = image_in[(height - 1) * width + j];
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j = j + 1;
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}
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stoptime();
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putarray(width * height, image_out);
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return num;
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}
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