The digital-image-processing tag has no wiki summary.
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header information is missing from image, after writing using opencv
I am doing complement of an image using open-cv python, while writing the image, open-cv is not writing the header information in the complemented image. my image data are in TIFF format.
i am doing ...
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16 views
i.atcorr empty raster
I am recent GRASS GIS user who is trying to run the i.atcorr module to atmospherically correct a Landsat ETM+ image in GRASS 7 (on MacBook Pro, Mavericks OSX). This image has been already converted to ...
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1answer
141 views
How to extract vegetation polygons from Imagery using Python?
I have been trying to roughly polygonize vegetation areas from Imagery (RGB). I tried using Iso Cluster Unsupervised Classification (Spatial Analyst) but it is still too detailed for my purpose. I ...
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105 views
Atmospheric correction for RapideEye without atmospheric parameters
I'd like to perform an atmospheric correction of my RapidEye images but metadata do no include atmospheric parameters required to use the 6s algo implemented in the Orfeo ToolBox. Is there a solution ...
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58 views
How to convert decision tree to ruleset in eCognition?
I have created a decision tree which created using decision tree tool in ENVI to classify 10 land cover types. Now I want to convert it to a ruleset in eCognition. How can I convert it?
Thank you ...
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2answers
157 views
Gdal: How iterate through all pixels of a raster image?
Given a topographic raster image.
How to iterate through all pixels of this raster image ?
Solution preferably with gdal, in console. Some other libraries/script could be installed.
Related: ...
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196 views
Question related with NDVI value on water
There is a surreal thing on my NDVI images. NDVI values on lake is ranging from -0.04 to 0.7. (The lake surrounded by forest and has freshwater). Theoretically, negative value of NDVI is correspond to ...
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222 views
Why does ArcGIS Resample tool change cell size and numbers of columns and rows?
I am working with images of oxygen distribution within individual plant root systems submerged in water. The program I use to acquire these images, LookatRGB, splits the green band in half and makes ...
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How can you calculate mean value per segment in Idrisi?
I have a segmented image and the original NIR/R/G bands in Idrisi Selva. I would like to calculate the mean NDVI per segment in Idrisi. There are so many tools, I'm not sure which would do the trick.
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190 views
Novel ways of filling in missing values in a raster
I am looking for robust ways to fill in missing values in some rasters. They all have a single layer. Missing values consist of single pixels to medium sized patches. Rasters are around 1000 x 1000 ...
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266 views
Enhanced vegetation index using ENVI 4.7 bandmath
I computed Enhanced Vegetation Index using band math in ENVI 4.7 software. The expression used was:
2.5*((float(b1)- float(b2))/(float(b1)+ (6*float(b2)) +(7.5* float(b3))))
BYTSCL(float(b1), min = ...
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1answer
77 views
Find the vertices of an ROI in XROI using IDL
I need to find the vertices of an ROI shape created in IDL's XROI, so that I can redraw the ROI on multiple images. I know you can find the centroid, area and perimeter with the GEOMETRY command, but ...
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1answer
253 views
Atmospheric Calibration for Landsat 7 ETM+ Gap Filling
This is for thesis work involving mapping of above-ground mangrove forest biomass using Landsat 7 ETM+ imagery.
I am assessing correlations between biomass with vegetative indices, e.g. NDVI, and ...
3
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1answer
239 views
Questions regarding the processing of mosaic Landsat 8
Approximate Translation of Original Question:
A question of theoretical and practical about the mosaic of satellite images. I have 3 different months of Landsat images, which need to accomplish the ...
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0answers
106 views
ENVISAT ASAR .N1 file is not being opened by ERDAS IMAGINE 2011
I am not able to open ENVISAT ASAR .N1 file in ERDAS IMAGINE 2011. The software has direct read option for files of this format. Whenever I try to open the file, software closes automatically giving ...
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0answers
152 views
How to mask clouds in ER Mapper?
I am using ER Mapper. But, I'm still confused how to detect and mask the clouds.
I want to reduce or eliminate the cloud to perform supervised and unsupervised classification.
3
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2answers
342 views
How to specify the pixel depth in model builder?
I have a simple model that calculates the NDVI from bands 3 and 4 of a raster dataset. The input bands are 8-bit unsigned, whereas the default output NDVI is signed 32 bit.
How can I specify the ...
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2answers
1k views
How to determine soil moisture index values from reflectance values in a satellite image?
I'm working on determination of soil moisture by remote sensing. I would like to know how we can determine soil moisture index values from reflectance values in LANDSAT TM images.
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2answers
278 views
How to manually reclassify a contiguous region of misclassified pixels?
The attached image is the result of an image segmentation algorithm on high resolution imagery. The smaller clusters of pixels represent trees and brush and the larger cluster of pixels (marked with ...
