FAQs

Q: Does piRAWnha support my camera?
A: piRAWnha supports raw files from cameras that Apple supports, listed here:  http://support.apple.com/kb/ht3825 However, if you want to use very large raw images in piRAWnha (>20MB), some users experience problems due to the iPad’s limited memory.

Q: How do I load raw images into piRAWnha?
A: You can load raw files into piRAWnha through the Apple iPad Camera Connection Kit or by syncing via iTunes on your computer.

Q: What happens if piRAWnha says it does not have access to my photo library?
A: You need to give piRAWnha access to Location Services.  To do this, see this link: http://support.apple.com/kb/HT1975.

Q: piRAWnha doesn’t recognize my raw files.  What should i do?
A: The iPad will occasionally mislabel a raw file as a tiff, or some other image format. The solution is to have piRAWnha look at all your images, not just those that your iPad thinks are raw. To do this, load an image, then click “[Help]” on the lower-right beneath the image view. Then click the wrench icon in the top-right to load the piRAWnha Preferences screen. Here you can select “piRAWnha should process: ” and top the “all images” side of the button. Then click done to return to the main screen, and tap “Load Photo”. The photo picker should now show non-raw images labeled with a red triangle in the lower-right corner, including those raw images that it *thinks* are non-raw.  Choose the problematic raw image. piRAWnha will load the image, and when it determines it is actually a raw image, you will be allowed to edit it with the full feature set of raw editing options. Proceed as normal to edit and export the image to your Photo Library.

Q: What can I do with the images after piRAWnha exports them?
A: Since the iPad writes the images to your Photos library, you can email or upload the piRAWnha-developed images as you would with any picture you have stored on your iPad.

Q: Does piRAWnha support raw+jpg?
A: In raw+jpg mode, your digital camera writes two files: a raw file and a jpeg file. The iPad Camera Connection Kit will sometimes only copy over the jpeg file, not the raw file, and piRAWnha cannot read the raw file if it was not copied to your iPad.  However, if you experience this, you can copy over the raw files via iTunes.

Q: Can I edit multiple pictures and export them as a batch?
A: Yes! You can edit an individual raw image and add it to the queue by tapping “Add to Queue” below the histogram. You can then load another image, and continue adding images to the queue. When you are ready to export the batch, just tap “Export Queue.”

Q: What file type and color space are the exported images?
A: Developed raw images are saved as sRGB jpeg files to your iPad’s Photo Library.

Q: What can I do to speed up piRAWnha?
A: Turning off the prompts (under Preferences) can sometimes help.  Additionally, make sure you have closed other programs, and if its been a while since you restarted the iPad, try restarting.

Q: The contrast slider is different than I’m used to, how does it work?
A: piRAWnha uses sigmoidal contrast, which is superior to regular contrast adjustments which can result in a loss of detail in the brightest and darkest parts of an image. piRAWnha’s contrast control will not “blow-out” bright highlights in your image, or send the shadows to pure black. The top slider, “Contrast Amount” controls how much contrast is to be applied to the image. The “Contrast Midlevel” slider controls where mid-tones end up in the adjusted image: negative values brighten the image mid-tones, 0% neither brightens nor darkens the image, and positive values darken the mid-tones. If the “Contrast Amount” slider is set to 0, moving the “Contrast Midlevel” slider does not cause any changes in the image.

Q: Can I set white balance from a selected area in a raw image?
A: piRAWnha does not currently support selected-area white balance, but we are working on this and will be possible in a version to be released as a free update in the near future.

Q: What sharpening and denoise settings should I use?
A: We recommend you use conservative settings for denoising and sharpening (low numbers for denoising, “Low,” “Medium,” “General,” or “Portrait” for sharpening) because aggressive settings of these algorithms can cause images to look too fake and “digital.”  Experimenting with these settings is the best way to figure out what looks best to you!

Q: After some edits, the histogram appears to have holes in it, why is this?
A: Changes in certain settings, like contrast and saturation, will cause various pixel values to be sent to the same value. This effect is not usually noticeable to the human eye, unless extreme adjustments are made.

Q: When should I change the black point and white point?
A: These two values are usually correct as calculated by piRAWnha. The black point is calculated by piRAWnha from hidden sensor pixels. However, if shadows appear foggy, then the Black Point slider should be increased from its default position. If there is a magenta cast on an image, it is possible that the white point used in the raw developing is incorrect; decreasing the white point slider could fix this issue. If the white point slider is too low, bright regions in the image (highlights) can be turned totally white, resulting in a loss of information in these areas.

Q: Can I modify the file format of the exported picture?
A: Currently piRAWnha just exports images as jpeg, but in the future we will offer support for other file types.

Q: What features will be coming to the next version of piRAWnha?
A: We will soon implement the following features: cropping, rotating, and exporting as other file types.  If you have ideas for new features, please contact us.

Q: Where did you get the image of the pirawnha?
A: The icon is a photograph of a piranha by Marcelo Jorge Vieira.