Questions tagged [resize-less]
The resize-less tag has no usage guidance.
46 questions
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Invalid or Unsupported Image Format
When I run my code and try to open the image that it created, I receive the following error: "Invalid or unsupported image format."
Can someone please help me understand why this is happening? I ...
CommunityBot
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39
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PSET 3: Color is messed up
I can't figure out how to fix the colors of large.bmp when I run it. It resizes correctly but the pixels are all messed up and don't look like the original. Someone help me? Please and thank you!
// ...
CommunityBot
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72
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pset3 resize (less) compiles but doesn't write into new file for factor != 1
I've been stuck with the pset3 for a long time now and can't figure out why my code isn't working; it compiles fine but doesn't produce an image except for the factor 1. Could someone point me in the ...
CommunityBot
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resize.c write to array
I think i made a breakthrough in this one with the rewrite method but i need to know how to write the triple to the array i tried a couple of things but didn't work out here's my code :
int main(int ...
CommunityBot
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48
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resize less help needed
i'm feeling so close to solve it but have some issues with the for loops i tried to
debug it and see what's going on but yet there's some things i can't explain specifically with triple variable i'm ...
CommunityBot
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2
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47
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Resize less fails when trying to resize small.bmp when n is not multiple of 4 or is 1(probably padding issue)
int oldHeight = bi.biHeight;
int oldWidth = bi.biWidth;
bi.biWidth *= n;
bi.biHeight *= n;
int padding = (4 - (bi.biWidth * sizeof(RGBTRIPLE)) % 4) % 4;
bi.biSizeImage = ((sizeof(RGBTRIPLE) * bi....
CommunityBot
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162
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pset4: resize (less comfortable)
I am receiving the below when I check Pset4:
:) resize.c and bmp.h exist.
:) resize.c compiles.
:) doesn't resize small.bmp when n is 1
:( resizes small.bmp correctly when n is 2
Byte 22 of pixel ...
CommunityBot
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2
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40
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Code divides image
I run my code and it complies and provides a (kind of) reflected image. It breaks the image in half and mirrors it instead of just reflecting. My goal was to switch the place of each pixel in the row, ...
- 1,571
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1
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25
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Resize Less - failing to resize small.bmp
Hi guys I've scratched my head about this for a week now and I'm struggling to see what the issue is. The smiley.bmp file seems to be resizing correctly but not the others. Can anyone offer some ...
- 69.3k
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pset3 resize less comfortable problem - mixed colour
I have been struggling with cs50 resize for quite some time.
Can't figure out why my code is wrong. The output seems to have a right size but it is in a bunch of random colour.
// Copies a BMP file
...
- 21k
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PLS help, not working
So this is my code and I really don't know where I am wrong. I followed the pseudocode but it still doesn't work. It compiles successfully, but it doesn't resize correctly or at least that is what ...
- 21k
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CS50 Resize(less comfortable) I can't create OUTFILE
I've been working on this pset for quite a few days now, but my program doesn't seem to be compiling. It keeps saying "could not create outfile"(my message). I have no idea what to do. Any help would ...
- 3,050
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60
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writing pixels n times to array
i'm struggling trying to figure out how to store pixels n times to an array
for (int i = 0, biHeight = abs(oldheight); i < biHeight; i++)
{
// iterate over pixels in scanline
for (...
- 21k
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93
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Pset3 Resize (less) - working fine except on small.bmp
Currently doing resize (less) problem on the CS50 course and can't understand why this code is not working as it should.
It will resize the large.bmp and the smiley.bmp but not the small.bmp ...
- 21k
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56
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PSet 3: resize (less) bfsize error
I'm SO close (I think!) to being done with "Resize (Less)" after a grueling run. After running check50, I'm a bit kerfuffled. Hexadecimal form of output file seems correct, as do the values of and ...
- 69.3k
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debugger only check the first breakpoint then jump to the end of code
I have tried many times , the debugger can only check the first if statement and it can be step over in the first if statement. But When it finished the if statement, just jump to the end of code, ...
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pset3 resize less
I'm having some problems and cannot seem to find the bugs. The program seems to function correctly but cs50 check says that the file is too large. Would love to have someone to look at my code and ...
- 115
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31
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Confusion with understanding how new values are assigned
I do not quite understand how this reuse of variables is incorrect:
// save initial values
int initial_Height = bi.biHeight;
int initial_Width = bi.biWidth;
int initial_padding = (4 - (...
- 115
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44
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resize less help needed please
I've been watching the walkthrough for 3 days now and can't understand the whole idea, i read the spec and wrote couple lines of code finally i decided to write the code with only psuedocode in the ...
- 118
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49
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cs50 pset3 resize less
im having some problme with resize and cant find them..
would love some help, ty!
// Copies a BMP file
#include <stdio.h>
#include <stdlib.h>
#include "bmp.h"
int main(int argc, char *...
CommunityBot
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35
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What does the loop for padding do in Resize(less)?
// skip over padding, if any
fseek(inptr, padding, SEEK_CUR);
// then add it back (to demonstrate how)
for (int k = 0; k < old_padding; k++)
{
...
- 14
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72
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Problem with CS50 Pset3 Resize Less
The issue that keeps occurring after compiling and running the file, is that the resulting output bmp file changes to an unsupported file format(as stated when clicking on the bmp image file after ...
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PSET3- Resize (Less)- Problem resizing horizontally
I've been stuck on this problem for over a week now, and even after reading answers to a few similar questions, I'm not getting where I'm going wrong :(
Watching the walkthrough, I wasn't quite sure ...
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261
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Pset4 resize less comfortable; doesn;t resize; please help
#include <stdio.h>
#include <stdlib.h>
#include "bmp.h"
int main(int argc, char *argv[])
{
// ensure proper usage
if (argc != 4)
{
fprintf(stderr, "Usage: ./copy ...
- 5,179
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1
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53
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CS50 - Pset3 - Resize (Less) - Wrong Bitmap Size
Could someone please review my code for Resize (Less) pset? My code resized everything correctly before I added a couple of extra variables and changed some things up, so I had some base sizes that ...
- 69.3k
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38
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CS50 pset3 i want to resize this image, code is working for some and not for others? Can anyone tell me whats the problem?
int n = atoi(argv[1]);
// read infile's BITMAPFILEHEADER
BITMAPFILEHEADER bf,bfR;
fread(&bf, sizeof(BITMAPFILEHEADER), 1, inptr);
bfR = bf;
// read infile's BITMAPINFOHEADER
BITMAPINFOHEADER bi,...
- 69.3k
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79
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pset3 Resize - Invalid or unsupported Image Format
So i think i finished resizing horizontally but when i try to open the output image
to check i get an error saying "Invalid or unsupported Image Format",
I read other similar questions here and i ...
- 69.3k
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56
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Is scan line not moving to the next line? I'm badly stuck. Please advice
I am getting only one green line, then a brown line and rest (about 90%) of the space filled with white and grey squares. I think, I am facing problem in moving the cursor to the next line. I tried to ...
- 69.3k
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51
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PSET3 Resize (Less) - works in debug50 but segmentation error when executing
I'm working on resize (less comfortable) in pset3 and it returns segmentation error when I execute the code. However, when I try to work out which line actually went wrong using debug50 and go through ...
- 69.3k
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96
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Where am I going wrong with this resize?
My output is a grey square with a white rectangle at the top and bottom. What is it fwriting?
// iterate over infile's scanlines (for each row)
for (int i = 0; i < bi.biHeight; i++)
{
//...
- 21k
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104
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Resize less comfortable (recopy method) need help
I implemented resize using recopy method as bellow but I think there are still some mistakes in my code that why it didn't yield the correct result. The thing is I'm not really sure how to implement "...
- 69.3k
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121
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Rewrite method in Resize (less) is printing wrong large.bmp
So my small image is resizing vertically but I get all the wrong colors. Can someone take a quick peek at my rewrite method to see where I've gone wrong? I've attached a pic of my large.bmp passing in ...
- 69.3k
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167
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CS50 - Pset3 - Resize (Less)
Can someone please review this code for Resize Less pset. It seems to me that it is functioning correctly and resizing the images appropriately. However, I am failing all of the checks when is submit ...
- 69.3k
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pset 3resize (less) how to store RGBTRIPLES in array
I am trying to store the RGB triples in the source file in an array, but I don't understand which variable type they are supposed to be.
I have tried char, int, BYTE, unsigned long.
The latter ...
- 69.3k
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132
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Pset3 - Resize (less confortable)
I am getting an error at IDE "Invalid or unsupported file format" for an input "n" equal or greater than:
68 for small.bmp
36 for smiley.bmp
27 for large.bmp
I also tried to peek with staff's ...
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147
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Pset 4 resize - problems with resizing
Can anyone help point out what's wrong with my resize algorithm? I have researched and tried out many ways to do it and watched the walkthrough so many times. Here's the resizing part of my code and ...
- 69.3k
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66
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[Pset 4 resize (less comfortable)]: problem with getting the correct RBG output
I have been stuck at Pset 4 resize (less comfortable) for some time.
The program is expected to resize a bmp by a factor n. I get the correct image size but the pixel contents are not correct.
Here ...
- 69.3k
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1
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1k
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PEST4 Resize (less comfortable)
Could you assist me to look at my codes, no idea why after resizing small imagine,
it turns out very weird result.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#...
- 1,009
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74
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pset4 resize(less) vertical
My code seems only work for horizontal but not vertical. I have tried different for loops but nothing works. Any suggestions would be extremely helpful. Thank you.
// Copies a BMP file
#include <...
- 69.3k
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resize(less) am baffled dont know whats changed pls help
okay so yesterday I started resize and made a bit of progress, today I played around with it to try and fix the alignment issues I had and somehow totally screwed it up and now I'm getting colours ...
- 69.3k
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Could someone please tell me where I'm going wrong here in resize-less(pset4)?
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bmp.h"
int main(int argc, char *argv[])
{
// ensure proper usage
if (argc != 4)
{
fprintf(stderr, "Usage: ...
- 69.3k
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1
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51
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Pset 4 - resize. Problem with proper padding
I've been stuck on resize for a while and I think I nearly have it. My outputs are nearly accurate except for the fact that some of the pixels are not being placed properly, and I think this has ...
- 21k
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1
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77
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Resize less confortable : issue writing new file header info and printing new image
I have been struggling for a couple of days on the resize less confortable problem.
So far my resized image looked enlarged by the right coefficient but the white section remains too small compared ...
- 21k
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1
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103
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pset 4 resize (less)
Having some growing pains with this pset. I think I have the horizontal resizing figured out with my for loop. My problem is iterating over the same line x number of times (where x is the scale ...
- 69.3k
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115
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Resize less comfortable; still stuck; cannot understand f(seek)
I thought I got it, but still stuck. any help appreciated
/**
* resizes bmp piece by piece
*/
include
include
include "bmp.h"
int main(int argc, char *argv[])
{
// ensure proper usage
...
- 162
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78
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resize/less - testing with cs50/pset4/peek lits all green but check50 shows some error
I have tried many times to find the error but have failed to do so ... here is my resize/less code
#include <stdio.h>
#include <stdlib.h>
#include "bmp.h"
int main(int argc, char *argv[...
- 21k