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Image.cpp
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Image.cpp
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#include "Image.h"
#include <cstdint>
#include <algorithm>
#include <QElapsedTimer>
#include <QDebug>
static inline uint8_t clamp_uint8(int v)
{
return v < 0 ? 0 : (v > 255 ? 255 : v);
}
static inline uint8_t gray(int r, int g, int b)
{
return (r * 306 + g * 601 + b * 117) / 1024;
}
Image Image::convertToFormat(Image::Format dformat) const
{
Image::Format sformat = format();
if (sformat == dformat) return *this;
const int w = width();
const int h = height();
if ((sformat == Format::UYVY8 && dformat == Format::YUYV8) || (sformat == Format::YUYV8 && dformat == Format::UYVY8)) {
Image newimage(w, h, dformat);
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
for (int x = 0; x < w; x++) {
d[0] = s[1];
d[1] = s[0];
s += 2;
d += 2;
}
}
return newimage;
}
if (dformat == Format::RGB8) {
if (sformat == Format::UYVY8) {
Image newimage(w, h, dformat);
// if (cuda) {
// cuda->convert_uyvy_to_rgb(w, h, this->bits(), newimage.bits());
// } else
{
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
uint8_t Y, U, V;
U = V = 0;
int w2 = w / 2;
for (int x = 0; x < w2; x++) {
int R, G, B;
U = s[0];
V = s[2];
Y = s[1];
R = ((Y - 16) * 1192 + (V - 128) * 1634) / 1024;
G = ((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024;
B = ((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024;
d[0] = clamp_uint8(R);
d[1] = clamp_uint8(G);
d[2] = clamp_uint8(B);
Y = s[3];
R = ((Y - 16) * 1192 + (V - 128) * 1634) / 1024;
G = ((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024;
B = ((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024;
d[3] = clamp_uint8(R);
d[4] = clamp_uint8(G);
d[5] = clamp_uint8(B);
s += 4;
d += 6;
}
if (w & 1) {
int U = s[0];
int Y = s[1];
int R = ((Y - 16) * 1192 + (V - 128) * 1634) / 1024;
int G = ((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024;
int B = ((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024;
d[0] = clamp_uint8(R);
d[1] = clamp_uint8(G);
d[2] = clamp_uint8(B);
}
}
}
return newimage;
}
if (sformat == Format::YUYV8) {
Image newimage(w, h, dformat);
// if (cuda) {
// cuda->convert_yuyv_to_rgb(w, h, this->bits(), newimage.bits());
// } else
{
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
uint8_t Y, U, V;
U = V = 0;
int w2 = w / 2;
for (int x = 0; x < w2; x++) {
int R, G, B;
U = s[1];
V = s[3];
Y = s[0];
R = ((Y - 16) * 1192 + (V - 128) * 1634) / 1024;
G = ((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024;
B = ((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024;
d[0] = clamp_uint8(R);
d[1] = clamp_uint8(G);
d[2] = clamp_uint8(B);
Y = s[2];
R = ((Y - 16) * 1192 + (V - 128) * 1634) / 1024;
G = ((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024;
B = ((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024;
d[3] = clamp_uint8(R);
d[4] = clamp_uint8(G);
d[5] = clamp_uint8(B);
s += 4;
d += 6;
}
if (w & 1) {
int U = s[1];
int Y = s[0];
int R = ((Y - 16) * 1192 + (V - 128) * 1634) / 1024;
int G = ((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024;
int B = ((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024;
d[0] = clamp_uint8(R);
d[1] = clamp_uint8(G);
d[2] = clamp_uint8(B);
}
}
}
return newimage;
}
if (sformat == Format::UINT8) {
Image newimage(w, h, dformat);
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
for (int x = 0; x < w; x++) {
d[0] = d[1] = d[2] = *s++;
d += 3;
}
}
return newimage;
}
}
if (dformat == Format::UINT8) {
if (sformat == Format::RGB8) {
Image newimage(w, h, dformat);
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
for (int x = 0; x < w; x++) {
int R = s[0];
int G = s[1];
int B = s[2];
*d++ = gray(R, G, B);
s += 3;
}
}
return newimage;
}
if (sformat == Format::UYVY8) {
Image newimage(w, h, dformat);
// if (cuda) {
// cuda->convert_uyvy_to_gray(w, h, this->bits(), newimage.bits());
// } else
{
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
uint8_t Y, U, V;
U = V = 0;
int w2 = w / 2;
for (int x = 0; x < w2; x++) {
int R, G, B;
U = s[0];
V = s[2];
Y = s[1];
R = clamp_uint8(((Y - 16) * 1192 + (V - 128) * 1634) / 1024);
G = clamp_uint8(((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024);
B = clamp_uint8(((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024);
*d++ = gray(R, G, B);
Y = s[3];
R = clamp_uint8(((Y - 16) * 1192 + (V - 128) * 1634) / 1024);
G = clamp_uint8(((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024);
B = clamp_uint8(((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024);
*d++ = gray(R, G, B);
s += 4;
}
if (w & 1) {
U = s[0];
Y = s[1];
int R = clamp_uint8(((Y - 16) * 1192 + (V - 128) * 1634) / 1024);
int G = clamp_uint8(((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024);
int B = clamp_uint8(((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024);
*d = gray(R, G, B);
}
}
}
return newimage;
}
if (sformat == Format::YUYV8) {
Image newimage(w, h, dformat);
// if (cuda) {
// cuda->convert_yuyv_to_gray(w, h, this->bits(), newimage.bits());
// } else
{
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
uint8_t Y, U, V;
U = V = 0;
int w2 = w / 2;
for (int x = 0; x < w2; x++) {
int R, G, B;
U = s[1];
V = s[3];
Y = s[0];
R = clamp_uint8(((Y - 16) * 1192 + (V - 128) * 1634) / 1024);
G = clamp_uint8(((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024);
B = clamp_uint8(((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024);
*d++ = gray(R, G, B);
Y = s[2];
R = clamp_uint8(((Y - 16) * 1192 + (V - 128) * 1634) / 1024);
G = clamp_uint8(((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024);
B = clamp_uint8(((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024);
*d++ = gray(R, G, B);
s += 4;
}
if (w & 1) {
U = s[1];
Y = s[0];
int R = clamp_uint8(((Y - 16) * 1192 + (V - 128) * 1634) / 1024);
int G = clamp_uint8(((Y - 16) * 1192 - (U - 128) * 400 - (V - 128) * 832 ) / 1024);
int B = clamp_uint8(((Y - 16) * 1192 + (U - 128) * 2065 ) / 1024);
*d = gray(R, G, B);
}
}
}
return newimage;
}
}
if (dformat == Format::UYVY8) {
if (sformat == Format::RGB8) {
Image newimage(w, h, dformat);
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
for (int x = 0; x < w / 2; x++) {
d[1] = ( 263 * s[0] + 516 * s[1] + 100 * s[2]) / 1024 + 16;
d[3] = ( 263 * s[3] + 516 * s[4] + 100 * s[5]) / 1024 + 16;
int R = (s[0] + s[3]) / 2;
int G = (s[1] + s[4]) / 2;
int B = (s[2] + s[5]) / 2;
int U = (-152 * R - 298 * G + 450 * B) / 1024 + 128;
int V = ( 450 * R - 377 * G - 73 * B) / 1024 + 128;
d[0] = U;
d[2] = V;
s += 6;
d += 4;
}
if (w & 1) {
d[1] = ( 263 * s[0] + 516 * s[1] + 100 * s[2]) / 1024 + 16;
int R = s[0];
int G = s[1];
int B = s[2];
int U = (-152 * R - 298 * G + 450 * B) / 1024 + 128;
d[0] = U;
}
}
return newimage;
}
if (sformat == Format::UINT8) {
Image newimage(w, h, dformat);
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
for (int x = 0; x < w; x++) {
d[1] = (*s++) * 225 / 256 + 16;
d[0] = 128;
d += 2;
}
}
return newimage;
}
}
if (dformat == Format::YUYV8) {
if (sformat == Format::RGB8) {
Image newimage(w, h, dformat);
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
for (int x = 0; x < w / 2; x++) {
d[0] = ( 263 * s[0] + 516 * s[1] + 100 * s[2]) / 1024 + 16;
d[2] = ( 263 * s[3] + 516 * s[4] + 100 * s[5]) / 1024 + 16;
int R = (s[0] + s[3]) / 2;
int G = (s[1] + s[4]) / 2;
int B = (s[2] + s[5]) / 2;
int U = (-152 * R - 298 * G + 450 * B) / 1024 + 128;
int V = ( 450 * R - 377 * G - 73 * B) / 1024 + 128;
d[1] = U;
d[3] = V;
s += 6;
d += 4;
}
if (w & 1) {
d[0] = ( 263 * s[0] + 516 * s[1] + 100 * s[2]) / 1024 + 16;
int R = s[0];
int G = s[1];
int B = s[2];
int U = (-152 * R - 298 * G + 450 * B) / 1024 + 128;
d[1] = U;
}
}
return newimage;
}
if (sformat == Format::UINT8) {
Image newimage(w, h, dformat);
for (int y = 0; y < h; y++) {
uint8_t const *s = scanLine(y);
uint8_t *d = newimage.scanLine(y);
for (int x = 0; x < w; x++) {
d[0] = (*s++) * 225 / 256 + 16;
d[1] = 128;
d += 2;
}
}
return newimage;
}
}
return {};
}