diff options
Diffstat (limited to 'sys/qcam/dark.c')
| -rw-r--r-- | sys/qcam/dark.c | 58 |
1 files changed, 29 insertions, 29 deletions
diff --git a/sys/qcam/dark.c b/sys/qcam/dark.c index ac462b36..cdfa2ab8 100644 --- a/sys/qcam/dark.c +++ b/sys/qcam/dark.c @@ -25,17 +25,17 @@ OTHER DEALINGS IN THE SOFTWARE. ******************************************************************/ /* Fixdark - Routine to repair dark current artifacts in qcam output. - Basic idea: the Qcam CCD suffers from "dark current"; - that is, some of the CCD pixels will leak current under - long exposures, even if they're in the dark, and this - shows up as ugly speckling on images taken in low light. + Routine to repair dark current artifacts in qcam output. + Basic idea: the Qcam CCD suffers from "dark current"; + that is, some of the CCD pixels will leak current under + long exposures, even if they're in the dark, and this + shows up as ugly speckling on images taken in low light. - Fortunately, the leaky pixels are the same from shot to - shot. So, we can figure out which pixels are leaky by - taking some establishing shots in the dark, and try to - fix those pixels on subsequent shots. The dark - establishing shots need only be done once per camera. + Fortunately, the leaky pixels are the same from shot to + shot. So, we can figure out which pixels are leaky by + taking some establishing shots in the dark, and try to + fix those pixels on subsequent shots. The dark + establishing shots need only be done once per camera. */ #ifdef HAVE_CONFIG_H @@ -77,7 +77,7 @@ read_darkmask() } if (fread(master_darkmask1, sizeof(unsigned char), MAX_WIDTH*MAX_HEIGHT, fp) != - MAX_WIDTH*MAX_HEIGHT) { + MAX_WIDTH*MAX_HEIGHT) { #ifdef DEBUG fprintf(stderr, "Error reading darkfile\n"); #endif @@ -88,14 +88,14 @@ read_darkmask() for (x = 0; x < MAX_WIDTH; x += 2) { min_bright = master_darkmask1[y][x]; if (y < MAX_HEIGHT-1 && master_darkmask1[y+1][x] < min_bright) - min_bright = master_darkmask1[y+1][x]; + min_bright = master_darkmask1[y+1][x]; if (x < MAX_WIDTH-1 && master_darkmask1[y][x+1] < min_bright) - min_bright = master_darkmask1[y][x+1]; + min_bright = master_darkmask1[y][x+1]; if (y < MAX_HEIGHT-1 && x < MAX_WIDTH-1 && master_darkmask1[y+1][x+1] < min_bright) - min_bright = master_darkmask1[y+1][x+1]; + min_bright = master_darkmask1[y+1][x+1]; master_darkmask2[y/2][x/2] = min_bright; - assert(y/2 < MAX_HEIGHT/2+1); - assert(x/2 < MAX_WIDTH/2+1); + assert(y/2 < MAX_HEIGHT/2+1); + assert(x/2 < MAX_WIDTH/2+1); } } @@ -103,14 +103,14 @@ read_darkmask() for (x = 0; x < MAX_WIDTH/2; x += 2) { min_bright = master_darkmask2[y][x]; if (y < MAX_HEIGHT/2-1 && master_darkmask2[y+1][x] < min_bright) - min_bright = master_darkmask2[y+1][x]; + min_bright = master_darkmask2[y+1][x]; if (x < MAX_WIDTH/2-1 && master_darkmask2[y][x+1] < min_bright) - min_bright = master_darkmask2[y][x+1]; + min_bright = master_darkmask2[y][x+1]; if (y < MAX_HEIGHT/2-1 && x < MAX_WIDTH-1 && master_darkmask2[y+1][x+1] < min_bright) - min_bright = master_darkmask2[y+1][x+1]; + min_bright = master_darkmask2[y+1][x+1]; master_darkmask4[y/2][x/2] = min_bright; - assert(y/2 < MAX_HEIGHT/4+1); - assert(x/2 < MAX_WIDTH/4+1); + assert(y/2 < MAX_HEIGHT/4+1); + assert(x/2 < MAX_WIDTH/4+1); } } @@ -121,15 +121,15 @@ read_darkmask() /* fixdark - We first record a list of bad leaky pixels, by making a - number of exposures in the dark. master_darkmask holds - this information. It's a map of the CCD. - master_darkmask[y][x] == val means that the pixel is - unreliable for brightnesses of "val" and above. + We first record a list of bad leaky pixels, by making a + number of exposures in the dark. master_darkmask holds + this information. It's a map of the CCD. + master_darkmask[y][x] == val means that the pixel is + unreliable for brightnesses of "val" and above. - We go over the image. If a pixel is bad, look at the - adjacent four pixels, average the ones that have good - values, and use that instead. + We go over the image. If a pixel is bad, look at the + adjacent four pixels, average the ones that have good + values, and use that instead. */ int |