Multimedia Security

Custom Profile Plot Multimedia Security 指導老師：黃文楨學生：葉博涵 9724823

目的 • Draws a line profile using getPixel() to get the pixels values along the line.

CODE getLine(x1, y1, x2, y2, width); if (x1==-1) exit("Line selection required"); values = getLineValues(x1, y1, x2, y2); Plot.create("Profile Plot", "X", "Values", values); function getLineValues(x1, y1, x2, y2) { dx = x2-x1; dy = y2-y1; n = round(sqrt(dx*dx + dy*dy)); xinc = dx/n; yinc = dy/n; n++; values = newArray(n); i = 0; do { values[i++] = getPixel(x1,y1); x1 += xinc; y1 += yinc; } while (i<n); return values; }

CODE getLine(x1, y1, x2, y2, width); … if (x1==-1) exit("Line selection required"); … values = getLineValues(x1, y1, x2, y2); … Plot.create("Profile Plot", "X", "Values", values);…

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Multimedia Security