Red image tinter7/21/2023 ![]() copy () masked_image *= red_multiplier fig, ( ax1, ax2 ) = plt. ones (( 9, 9 ))) textured_regions = noisy > 4.25 # Note that using `colorize` here is a bit more difficult, since `rgb2hsv` # expects an RGB image (height x width x channel), but fancy-indexing returns # a set of RGB pixels (# pixels x channel). entropy ( img_as_ubyte ( grayscale_image ), np. copy () sliced_image = colorize ( image, 0.82, saturation = 0.5 ) sliced_image = colorize ( image, 0.5, saturation = 0.5 ) # Create a mask selecting regions with interesting texture. top_left = ( slice ( 25 ),) * 2 bottom_right = ( slice ( - 25, None ),) * 2 sliced_image = image. To 1, so that hue, saturation, and value all share the same scale.īelow, we plot a linear gradient in the hue, with the saturation and valueįrom skimage.filters import rank # Square regions defined as slices over the first two dimensions. In scikit-image, however, hues are float values from 0 In some implementations, the hue in HSV goes from 0 to 360, since hues wrapĪround in a circle. where olive is on the low end and neon on the high end. For example, aĬolor (hue) might be green, but its saturation is how intense that green is One popular color space is called HSV, which represents hue (~theĬolor), saturation (~colorfulness), and value (~brightness). There are many other color spaces in which you can represent a color In many cases, dealing with RGB values may not be ideal. imshow ( yellow_multiplier * image ) plt. ![]() subplots ( ncols = 2, figsize = ( 8, 4 ), sharex = True, sharey = True ) ax1. gray2rgb ( grayscale_image ) red_multiplier = yellow_multiplier = fig, ( ax1, ax2 ) = plt. They could have two R cameras and sent you the wrong one.Import matplotlib.pyplot as plt from skimage import data from skimage import color from skimage import img_as_float, img_as_ubyte grayscale_image = img_as_float ( data. Good news is you could probably sell it for more – might inquire with the seller. Ok, I just checked the metadata of the file you posted – since it say's R, you don't have the Ra firmware. I'm not sure if Canon allows this or not. If you're already at 1.8.0, you might try downloading the R 1.8.0 and see if it will let you reinstall it. If that doesn't fix the issue, then it's been modified for astro. I have the Ra and checked my files – daylight shots in AWB are already close to 5K temperature, so Canon must be shifting the white balance behind the scenes and writing the compensated temperature to the RAW metadata.īut for sure check your firmware version – if you are at anything before 1.8.0, then upgrade to the R 1.8.0 firmware right away. Well, my theory on checking for #2 isn't going to work. I'll try this during daylight tomorrow, and let you know what happens. If your white balance is way off from 5K – say 3000K, then #2 is true, and the Ra firmware was installed on your R. ![]() If the white balance temperature is set to around 5000K, then that means #1 is true – camera was modified for astro. Set your in-camera white balance to Daylight, take a sample shot, and then look at the RAW file in Photoshop/Lightroom/Capture One, etc. I messed with the image you posted in the Photoshop Camera Raw Filter, and an equal shift of temperature and tint fixes the issue – this supports either of the above two options. If somehow the Ra firmware was used to upgrade your R, then it may have to go back to Canon to have the R firmware installed – or if you don't have the latest 1.80 firmware yet, download the 1.80 for the R and install it. The EOS Ra has special firmware that compensates for the extra H-a sensitivity to red by shifting the white balance automatically so that daylight photos look normal. Firmware for the EOS Ra was accidentally installed on the R.Since the electronic viewfinder picture is also affected, and since you have loaded factory settings, then if each of the above tests fail, you may be looking at a hardware issue. ![]() In any case, I would update to the v1.8.0 firmware or later. It does list a few fixes for image quality-type of problems with certain lenses, though I didn't see anything that exactly matched your issue. What MikeJ9116 said, and also anything that will help narrow this down:ī) Are there any scenes you have shot which do not show the red tint?Ĭ) If you have a grey card, what does that photo look like?ĭ) different memory card (should not matter)Īlso, I took a look at the firmware update history. Best to contact the previous owner or store and ask questions, though usually this would be highlighted during the sale. I'm not sure there is an easy way to tell externally without another R camera to compare against. Since this isn't the Ra model, the modification for astrophotography or UV/IR requires physical modification to the filter in front of the sensor. >"Has it been modified for astrophotography?" Yeah, tried resetting, and the red tint is still present.
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